content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
set of linear simultaneous equations
January 5th 2006, 07:01 PM #1
Newbie
Joined
Jan 2006
Posts
3
Algebra Homework Help URGENT!!!
I have a huge algebra problem, that i need solved for me, and show me how it's done, if possible. Urgent reply needed its due very soon.
8k - 5n = 8r
3u + 2o = 189
... | 5 | [
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-0.068847... | 900 | 900 | |
A very difficult problem for me
October 18th 2008, 10:12 AM
Maccaman
A very difficult problem for me
A long cylinder of material with a with a rectangular cross-section occupies the region 0 < x < a, 0 < y < b in space. The faces at x = 0 and x = a are held at temperature u=0 , and the face at y
= b is therm... | 5 | [
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-0.0223388671875,... | 901 | 901 | |
Quadratic equations
Posted by Marysvoice on Monday, February 11, 2008 at 10:32am.
OK. I think I have my head around most of this but for one question. I have plotted a graph with the quadratic equation tickets=-02x^2+12x+11.
My graph opens down and shows I will sell tickets for 60 days peaking at the vertex at 30 day... | 4 | [
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-0.033203125,... | 902 | 902 | |
Math (Pre-cal)
Posted by Dragon on Wednesday, January 26, 2011 at 8:24pm.
I can't seem to figure this out.
A ship leaves at noon and travels due West at 20 knots. At 2:00 it changes to N54°W...Find the bearing and the distance FROM port at 3:00 pm.
I've looked at this program for a while but can't figure it out.
... | 4 | [
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0.0262451171875,
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0.0478515625,
-0.0084228515625,
-0.040... | 903 | 903 | |
Solar system
Posted by Kim on Monday, January 1, 2007 at 3:36pm.
According to the theory of gravitation, the earth must be continually “falling” toward the sun. If this is true, why does the average distance between earth and sun not grow smaller?
Without gravity, the Earth would go in a straight line. It falls towar... | 5 | [
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-0.0... | 904 | 904 | |
Homework Help
Posted by Christine on Sunday, June 7, 2009 at 5:12pm.
A) A rectangle has perimeter 64 cm and area 23 cm^2. Solve the following system of equations to find the rectangle's dimensions.
length=23/width
length + width = 32
B) Solve the system of equations
x^2+y^2=1
xy=0.5
• Math - MathMate, Monday, ... | 4 | [
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0.002258... | 905 | 905 | |
Math Help
March 4th 2007, 09:04 AM #1
Junior Member
Joined
Jul 2006
Posts
73
supremum
For each of these sets for their, supremum and infimum (if they exist), maximum and minimum (if they exist), interior (explain your reasoning), boundary (explain your reasoning), set of
accumilation points (explain... | 4 | [
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0.005767822265625,
0.0263671875,... | 906 | 906 | |
maths --plse help me..
Posted by sania on Wednesday, December 12, 2012 at 11:13am.
prove that the lines through a(0,-1,-1) and b(4,5,1) intersects the line through c (3,9,4) and d (-4,4,4). also find their point of intersection
• maths --plse help me.. - Steve, Wednesday, December 12, 2012 at 11:38am
L1:
x... | 4 | [
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Homework Help
Posted by mkcolema on Friday, March 13, 2009 at 8:44pm.
Consider the function f(x)= (2x+8)/(6x+3). For this function there are two important intervals: (-inf, A)
(A, inf) and where the function is not defined at A .
Find A
For each of the following intervals, tell whether is increasing (type in INC) o... | 5 | [
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-0.0625,
... | 908 | 908 | |
What is the third root of i?
$z^3 = i$ $\Rightarrow r^3 \text{cis} (3 \theta) = \text{cis} \left( \frac{\pi}{2} + 2n \pi\right)$ where n is an integer. Therefore $r = 1$ and $\theta = \, .....$ (get three values of $\theta$ that
give three distinct solutions for z). This gives the three cube roots of i in polar form. C... | 5 | [
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0.01336669921875,... | 909 | 909 | |
Overview of Frequentist Hypothesis
COMMON MISTEAKS MISTAKES IN USING STATISTICS: Spotting and Avoiding Them
Overview of Frequentist Hypothesis Testing
Most commonly-used frequentist hypothesis tests involve the following elements:
1. Model assumptions (e.g., for the t-test for the mean, the model assumptions can b... | 4 | [
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Homework Help
Posted by kai on Tuesday, December 11, 2012 at 10:45am.
Two lookout stations, which are 25 miles apart along the coast on a north-south line, spot an approaching yacht. One lookout station measures the direction to the yacht at N 33degrees E, and the
other station measures the direction of the yacht at S... | 4 | [
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Supplement & Complement
October 15th 2009, 09:45 AM #1
Newbie
Joined
Oct 2009
Posts
2
Supplement & Complement
I been out of school for a weak because I had a appendix attack. Can you guys help me with these two so I can do the rest.
1) The measure of a supplement of an angle is 12 more then twice th... | 4 | [
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... | 912 | 912 | |
Homework Help
Posted by julia on Wednesday, December 5, 2007 at 1:16pm.
A 20 kg child on roller skates, initially at rest, rolls 4 m down an incline at an angle of 30 degrees with the horizontal. If there is no friction between incline and skates, what is the kenetic
energy of the child at the bottom of the incline? (... | 4 | [
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0.07080078125,
0.0194091796875... | 913 | 913 | |
Trig Equation
Posted by sqleung on Saturday, March 1, 2008 at 1:52am.
Solve for x (exact solutions):
sin x - sin 3x + sin 5x = 0
-¦Ð ¡Ü x ¡Ü 0
------
Now, using my graphics calculator, I discovered that the following equation has 5 solutions. I have managed to come up with 3 of them but I'm having trouble finding ... | 4 | [
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... | 914 | 914 | |
Help with Math
Posted by Rachel on Tuesday, July 22, 2008 at 9:56pm.
How would i determine the values of 'k' if the graph y=2x^2-2x+3k intersects the x-axis at two distinct points?
• Help with Math - Dr Russ, Wednesday, July 23, 2008 at 7:31am
This is similar ot the other problem.
If the equation crosses ... | 4 | [
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-0.017944335937... | 915 | 915 | |
Kepler's Third Law
Problem : A geostationary satellite remains at the same position above the earth's surface at all times. What height above the surface must it be (assume the orbit is circular)? (Hint: What must the
period be?) ($M_e = 5.98 \times 10^{24}$ kilograms and $r_e = 6.38 \times 10^6$ meters).
The period o... | 5 | [
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... | 916 | 916 | |
resolving forces
April 27th 2010, 12:40 AM
furor celtica
resolving forces
a lamp is supported in equilibrium by two chains fixed to two points A and B at the same level; the lengths of the chains are 0.3m and 0.4m and the distance between A and B is 0.5m. Given that
the tension in the longer chain is 36N, sh... | 4 | [
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Homework Help
Posted by Anonymous on Thursday, May 3, 2012 at 8:04pm.
1/2 life of R 226 if A(t)=600e^-0.00043t
i got stuck
A(t)=A(t)=600e
A(t)=600/2=300
300=A(t)=600e
• math - Steve, Friday, May 4, 2012 at 10:45am
300 = 600e^-.00043t
1/2 = e^-.00043t
-ln2 = -.00043t
t = 1612
so, after 1612... | 4 | [
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standard deviation
Number of results: 7,857
Statistics
The law of large numbers tells us what happens in the long run. Like many games of chance, the numbers racket has outcomes so variable - one three-digit number wins $600 and all others win nothing -
that gamblers never reach "the long run." Even after many bets, t... | 4 | [
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rearranging an equation
November 27th 2006, 01:54 PM
mesterpa
rearranging an equation
hi
im trying to rearrange an equation to make y the subject to then use partial fraction expansion and laplace inverses to solve.
so far i have simplified to give
y(S^4 + 3S^2 -12) = 104/s+3 -24 +12S^3 - 3S^2 + 25S... | 5 | [
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[SOLVED] Series - Geometric Sum Formula
August 6th 2008, 09:52 AM #1
Member
Joined
Jul 2008
Posts
119
[SOLVED] Series - Geometric Sum Formula
Problem:
Find a formula for
a.
$\frac{1}{1+x^2}+\frac{1}{(1+x^2)^2}+...+\frac{1}{( 1+x^2)^n}$
b. Also, show that if $a eq 0$, then
$\frac{1}{a}... | 5 | [
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-0.0659179687... | 921 | 921 | |
Recurrence relation.. does this look correct?
April 25th 2009, 09:03 PM #1
Newbie
Joined
Apr 2009
Posts
4
Recurrence relation.. does this look correct?
I have to find the recurrence relation by the sequence
a(x) = x - (-1)^x
initial conditions are x(0) = -1 x(1) = 2
A(x) - a(x-1) = x-(-1)^... | 4 | [
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... | 922 | 922 | |
Homework Help
Posted by Sachiyo on Tuesday, January 24, 2012 at 9:30pm.
city A is 300 miles directly north of city B assuming the earth to be sphere of radius 4000 miles determine the difference in latitude in degrees of the two cities
• trig - Steve, Wednesday, January 25, 2012 at 12:54pm
arc length s = rθ
... | 4 | [
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numpy.polynomial.polynomial.polyint
numpy.polynomial.polynomial.polyint¶
numpy.polynomial.polynomial.polyint(c, m=1, k=[], lbnd=0, scl=1, axis=0)[source]¶
Integrate a polynomial.
Returns the polynomial coefficients c integrated m times from lbnd along axis. At each iteration the resulting series is multiplie... | 5 | [
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0.051025390625,
-0.074218... | 924 | 924 | |
Homework Help
Posted by Arielle on Monday, November 21, 2011 at 11:21am.
The force of attraction between the earth and some object is called the weight of that object. The law of gravitation states, then, that the weight of an object is inversely proportional to the
square of its distance from the center of the earth.... | 4 | [
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0.04077148437... | 925 | 925 | |
Integration Problem, sector of a circle.
December 8th 2011, 02:55 PM #1
Newbie
Joined
Dec 2011
Posts
3
I am currently studying for my calculus 1 final (which is on the 12th) and have reached some questions I cannot answer. For those who might have the book they are in section 8.2.8 of "Modern
Engineer... | 5 | [
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Cayley Transform for all reductive groups a.k.a an algebraic logarithm
up vote 5 down vote favorite
1
Is it true that for every reductive algebraic $G$ over ${\mathbb C}$ with a Lie algebra $\mathfrak g$ there is an open neighborhood $U$ of the identity in $G$ and an algebraic function (in a sense of
algebraic geometr... | 4 | [
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0.09912109375,
0.0224609375,
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-0.00848388671875,
-0.00494384765625,
-0.01434326171875,
-0.126953125,
... | 927 | 927 | |
Homework Help
Posted by jota on Sunday, May 6, 2012 at 11:44pm.
if $9,000 is to be invested, part at 13% and the rest at 8% simple interest , how much should be invested at each rate so that the total annual return will be the same as $9,000 invested at 9% set up
as a system of linear equation
• math - MathMate, Mo... | 4 | [
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Homework Help
Posted by jacqueline on Tuesday, April 30, 2013 at 1:09pm.
write a rational and irrational number between 1.12301 and 1.1230101.
• math theory - Steve, Tuesday, April 30, 2013 at 2:03pm
rational: 1.12301005
for an irrational, try this:
1.12301^2 = 1.2611514601
1.1230101^2 = 1.26115168... | 4 | [
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Positive definite symmetric matrix has maximal elements on diagonal
February 4th 2013, 09:31 AM
blmalikov
Positive definite symmetric matrix has maximal elements on diagonal
Let A be a positive definite symmetric matrix. Prove that for any column (or row) the maximal element of that list is on the diagonal. I've... | 5 | [
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0... | 930 | 930 | |
Quantum Physics
Posted by Anonymous on Tuesday, September 17, 2013 at 10:26am.
I try to make a Quantum Fourier Transformation with N=6:
w=e^(2*pi*7/6)
so we have 6-th roots: 1,w,w^2,-1,-w,-w^2
My matrix is QFT6= 1/sqrt(6)*
(1 1 1 1 1 1 )
(1 w w^2 -1 -w -w^2)
(1 w^2 -w 1 w^2 -w )
(1 -1 1 -1 1 -1 )
(1 -w w^2 1 -... | 4 | [
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A Gentle Introduction to Wavelets
This is a paper written out of frustration.
This summer I decided to go to the SigGraph ’96 graphic conference in New Orleans. Through the courses I attended there I got really interested in the recent developments in wavelet theory and
applications (image synthesis, compression etc.... | 4 | [
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0.0311279296... | 932 | 932 | |
Homework Help
Posted by Debbie on Sunday, March 14, 2010 at 4:31am.
A cold metal bar at -30 degrees Celsius is submerged in a pool maintained at a temperature of 40 degrees Celsius. Half a minute later, the temperature of the bar is 20 degrees Celsius. How long will
it take the bar to attain a temperature of 30 degree... | 5 | [
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-0... | 933 | 933 | |
stuck on integration
April 14th 2009, 06:41 AM #1
Junior Member
Joined
Feb 2009
Posts
41
How do you integrate:
sin(x)sin(nx)dx between Pi and Pi/2 when n doesnt equal 1
by parts doesnt work does it?
any help would be great
Remember that:
$\cos(A+B) = \cos(A)\cos(B) - \sin(A)\sin(B)$... | 5 | [
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[amsat-bb] Re: maximum AO-7 distance
Stephen Melachrinos melachri at verizon.net
Mon Oct 1 18:48:56 PDT 2012
On 10/01/12, Bob- W7LRD<w7lrd at comcast.net> wrote:
> to my AO-7 afictionados...what is the maximum distance one can work edge to edge, and how did you figure that out?
> 73 Bob W7LRD
Bob -
Here's my ta... | 4 | [
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Equation of a tangent to a curve calculus help!
January 31st 2009, 01:28 PM
kimberlyann
Equation of a tangent to a curve calculus help!
So for the following question, I have gone through the steps to solve it. I am just not confident in my answer so if anyone could help that would be appreciated!
Q. Find th... | 4 | [
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Falling Object in Straight Line
April 27th 2010, 12:26 AM
Lukybear
Falling Object in Straight Line
An object falling in a vertical line passes a window 3 m high in 1/6 seconds. Find the distance above the top of the window from which the object let fall.
No idea about this question at all.
I did
a=... | 4 | [
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Maximizing the probability with standard normal random variables
November 30th 2010, 01:37 PM
Zennie
Maximizing the probability with standard normal random variables
Let $Z$ be a standard normal random variable and $\alpha$ be a given constant. Find the real number $x$ that maximizes $P( x < Z < x+\alpha)$.
... | 5 | [
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help with a differential equation
Can anyone solve the Abel differential equation x y \frac{dy}{dx} = x + y It looks so easy (Shake)
Hi! Edit: Aaaargh, mr fantastic is right, Edit: the following is the wrong: $x*y \frac{dy}{dx} = x+y$ $x*y - y \frac{dy}{dx} = x$ $y (x-1) \frac{dy}{dx} = x$ $y \frac{dy}{dx} = \frac{x}{... | 5 | [
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College physcs
Posted by Lanise on Wednesday, February 10, 2010 at 11:02pm.
A capacitor in a single-loop RC circuit is charged to 64% of its final voltage in 1.5 s.
Find the time constant for the circuit.
Find the percentage of the circuit's final voltage after 3.9 s .
Vc/Vi= %
• College physics - drwls, Thursda... | 5 | [
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... | 940 | 940 | |
derivative of an integral
April 17th 2008, 07:05 AM #1
Member
Joined
Oct 2007
From
Nevada
Posts
188
derivative of an integral
d/dx of the integral from 0 --> x^2 of sin^2t * dt
can you guys understand that. i don't know how to do that fancy synthax.
and the question i have about this was wh... | 5 | [
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0.0654296875,
0.01501464... | 941 | 941 | |
Homework Help
Posted by Harm on Saturday, July 27, 2013 at 11:26am.
Q2_2: QUIZ 2, PROBLEM #2
The composite beam AB, of length L=2m, is free at A (x=0) and fixed at B (x=L) and is composed of a round cylindrical core of constant radius R0=1cm bonded inside a sleeve of thickness R0 (outer
radius 2R0=2cm). The beam is l... | 4 | [
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0.060546875,
0.0032501220703... | 942 | 942 | |
Calculation of the Focal Length
To take a practical example, the appendix to http://www.qsl.net/n1bwt/chap5.pdf describes the calculation of the focal length of an offset dish by measuring three points along the curve of the dish,
and using the coordinates to solve three quadratic equations with three unknowns - the fo... | 5 | [
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0.04833984375,
... | 943 | 943 | |
Several problems regarding Ideals
February 19th 2008, 07:52 AM #1
Newbie
Joined
Feb 2008
Posts
16
Several problems regarding Ideals
Hello, i am stumped on these problems, and i am wondering if anybody could help me
1. Prove or disprove that in the ring Z[X], <2X> = <2,X>
2. Suppose that I is an... | 5 | [
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word problem using implicit differentiation
November 28th 2008, 12:31 PM #1
word problem using implicit differentiation
fluid is entering a spherical tank with a 6 inch radius at a constant rate of 30 pi cubic inches per hour. when the water is h feet deep, the volume of the water in the tank is given by:
V =... | 5 | [
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-0.023193359375... | 945 | 945 | |
Rotated ellipse equation sought
March 14th 2008, 01:05 PM #1
Newbie
Joined
Jan 2008
Posts
24
I'm looking for a Cartesian equation for a rotated ellipse.
h is x-koordinate of the center of the ellipse.
k is y-koordinate of the center of the ellipse.
a is the ellipse axis which is parallell to ... | 5 | [
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... | 946 | 946 | |
SparkNotes
Multiplication of a Polynomial by a Monomial
To multiply a polynomial by a monomial, use the distributive property: multiply each term of the polynomial by the monomial. This involves multiplying coefficients and adding exponents of the
appropriate variables.
Example 1: 3y ^2(12y ^3 -6y ^2 + 5y - 1) = ?
=... | 4 | [
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0.07958984375,
... | 947 | 947 | |
Homework Help
Posted by Anonymous on Monday, March 14, 2011 at 4:58pm.
what does x equal if x/4-3x/2=-1/2
• MATH - Anonymous, Monday, March 14, 2011 at 5:14pm
3x/2=(3*2*x)/(2*2)=6x/4
x/4-3x/2=(x/4)-(6x/4)= -5x/4
• MATH - Anonymous, Monday, March 14, 2011 at 5:19pm
-5x/4= -1/2 Multiply with 4
... | 4 | [
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0.05517578125,
-0.05419921875,
-0... | 948 | 948 | |
Homework Help
Posted by mike on Thursday, October 28, 2010 at 8:16pm.
6 burgers and 3 hot dogs cost $27. 5 burgers and one hot dog cost $18.75. what is the price of a hot dog? what is the price of a hamburger?
• algebra - jai, Thursday, October 28, 2010 at 9:47pm
first, represent unknowns using variables:
... | 4 | [
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-0.080078125,
0.014221191... | 949 | 949 | |
Just 2 questions
February 13th 2007, 02:08 PM #1
Junior Member
Joined
Oct 2006
From
canada
Posts
68
Just 2 questions
sorry to ask for so much help
they ask me to find the average rate of change from x=1 to x=2 in the equation x-2x^2
then they give me the equation x^2-2 and ask me to find f(... | 4 | [
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0.0458984375,
-0.061767578125,
-0.0820... | 950 | 950 | |
Homework Help
Posted by Alexis on Tuesday, October 25, 2011 at 11:46pm.
An air traffic controller spots 2 planes at the same altitude converging on a point as they fly at right angles to each other. One plane is 150 miles from the point moving at 450 miles per hour. The
other plane is 200 miles from the point moving a... | 5 | [
0.006439208984375,
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0.0242919921875,
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0.13671875,
-0.054931640625,
-... | 951 | 951 | |
Homework Help
Posted by Anonymous on Saturday, September 24, 2011 at 2:54pm.
Let f be defined as follows:
h(x)=
-x-3 for x greater than or equal to 1
ax+b for -2<x<1
x(squared) for x less than or equal to -2
Find the values of "a" and "b" that make h(x) continous.
I'm a bit stumped on how to go about solving thi... | 4 | [
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-0.046630859375,
-0.1... | 952 | 952 | |
Applications of Vector Addition
February 14th 2010, 08:03 PM #1
Newbie
Joined
Feb 2010
Posts
12
Applications of Vector Addition
Hi, I need help with another vector word problem.
A supply boat needs to cross a river from point A to point B, as shown in the attached diagram. Point B is 1.5 km downstre... | 5 | [
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-0.08544921875,
0.01... | 953 | 953 | |
electric field
March 30th 2008, 01:26 AM #1
Member
Joined
Jan 2008
Posts
154
Find the electric field a distance $z$ above the center of a flat circular disk of radius $R$, which carries a uniform surface charge $\sigma$. What does your formula give in the limit $R \to \
infty$. Also check the case $z ... | 5 | [
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-0.01214599609375,
-0.043212890625,
-... | 954 | 954 | |
Homework Help
Posted by Tell on Saturday, April 18, 2009 at 10:07am.
1) Lowering the price by 10%. What is the break-even level of output?
The company produces specialized glass units and is concerned that, as the market leader, they should be able to make higher profits than they currently are. The firm’s costs are ... | 4 | [
-0.0306396484375,
-0.00341796875,
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0.0098876953125,
-0.063... | 955 | 955 | |
Mostly Differential Equations and 3 others
April 21st 2006, 09:45 AM #1
Junior Member
Joined
May 2005
Posts
60
Mostly Differential Equations and 3 others
Hi, I am having trouble with differential equations . I studied these a long time ago and I'm having difficulty remembering them now. Also there are a ... | 5 | [
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Few things with my Cardano triplet algorithm
February 1st, 2013, 04:02 PM #1
Member
Join Date
Feb 2012
Posts
173
Thanks
6
Thanked 10 Times in 10 Posts
I'm trying to work through problem 251 on Project Euler. Problem 251 - Project Euler
I've got a working algorithm with a few shortcuts while m... | 4 | [
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... | 957 | 957 | |
Lens Form: Sphere, Cylinder, and Axis
It can be helpful to think of very basic lens forms in terms of prisms. Recall, as light passes through a prism it is refracted toward the prism base. Minus lenses therefore resemble two prisms apex
to apex spreading light rays outward as they pass through the lens, while plus lens... | 4 | [
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... | 958 | 958 | |
In equalities
Because in Case 2 you require the denominator to be negative.
Yes, Prove It's method is very nice. You could also consider this method to avoid making a lot of calculations.... $\displaystyle\frac{x}{3-x}<2$ Start by examining the denominator and realise that
if $x>3$ the denominator is always negative. ... | 4 | [
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Homework Help
Posted by Anonymous on Sunday, November 4, 2012 at 8:56pm.
Gravel is being dumped from a conveyor belt at a rate of cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always equal to each other.
How fast is the height of the pile increasing whe... | 5 | [
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Wolfram Demonstrations Project
A Reluctant Random Walk
There are cards labeled 1, 2, ..., . Initially, the cards are randomly divided between two players, A and B. For example, if is even, each player could get half of the cards. At each move of the
game, one of the numbers from 1 to is chosen at random and the player... | 4 | [
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-0.04345... | 961 | 961 | |
Quadratic Polynomials: The Quadratic Formula
The quadratic formula is nothing else but completing the square once and for all.
Let us find the roots of the polynomial
ax^2+bx+c
by completing the square. First we write the... | 4 | [
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Invertible matrix
November 20th 2012, 11:10 AM
tinabaker
Invertible matrix
Find the value (A power of T) power -1 where
A power -1 =
1 2 3
2 0 1
1 1 -1
the answer in the book is
1 2 1
2 0 1
3 1 -1
Not sure how they got this.
November 20th 2012, 11:23 AM
bonfire09
Re: In... | 5 | [
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Computing Integrals
The change of variables method for antidifferentiation comes from the chain rule. We will first demonstrate the method for definite integration and then formulate it in terms of indefinite
integration.
The change of variables formula states that for functions f and g ,
... | 5 | [
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0... | 964 | 964 | |
Math Help
February 13th 2011, 12:31 PM #1
Newbie
Joined
Nov 2010
Posts
19
sequences
Hi all,
I'm trying to solve the following 2 questions , can anyone help?
1. Let
2.Let
For the first part , I think for
If $\displaystyle \sum_{k=1}^{\infty} |a_{k}|< \infty$, then the series conver... | 4 | [
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0.00933837890625... | 965 | 965 | |
Statistics
Welcome to the Teachers' Choice Software web site.
Our FREE on line mathematics 'How-To' library is open 24 hours a day.
The ever-growing library now has 71 helpful topics, and every topic includes a free download!
Statistical data can by typed in by hand, or imported as a text file. This makes it po... | 4 | [
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0.004180908203125,
-0.03... | 966 | 966 | |
Quick Question logs
July 12th 2009, 06:36 AM #1
Newbie
Joined
Jul 2009
Posts
8
Quick Question logs
Hi,
I was just wondering if someone could take a look at this question and take a look at how i worked it out and if they thought it looks right.
The worlds total proved reserves of oil have recent... | 4 | [
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-... | 967 | 967 | |
Extended IDL Help
This page was created by the IDL library routine mk_html_help. For more information on this routine, refer to the IDL Online Help Navigator or type:
? mk_html_help
at the IDL command line prompt.
Last modified: Sun Jan 12 09:22:23 2014.
List of Routines
Routine Descriptions
ALPHA_BEAM
[Ne... | 5 | [
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0.016357421875,
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0.045654296875,
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Strange Meeting
8.7 Strange Meeting
It seemed that out of battle I escaped
Down some profound dull tunnel...
Willfred Owen (1893-1918)
In the summer of 1913 Einstein accepted an offer of a professorship at the University of Berlin and membership in the Prussian Academy of Sciences. He le... | 4 | [
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... | 969 | 969 | |
Derivative help: f(x) = 6x^6 sqrt[x] + 2/(x^2 sqrt[x])
October 13th 2006, 08:35 PM #1
Junior Member
Joined
Sep 2005
Posts
62
Derivative help: f(x) = 6x^6 sqrt[x] + 2/(x^2 sqrt[x])
I know how to take the Derivative for a much simpler question but I have no idea how to do it with this one. Do I get rid of ... | 5 | [
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0.... | 970 | 970 | |
Suppose that m,n,q,r are integers satisfying n=mq+r. Then gcd(m,n)=gcd(m,r).
March 12th 2013, 10:15 AM
mokaro
Suppose that m,n,q,r are integers satisfying n=mq+r. Then gcd(m,n)=gcd(m,r).
Suppose that m,n,q,r are integers satisfying the identity n=mq+r. Then gcd(m,n)=gcd(m,r).
Let gcd(m,n)=k where k is some... | 4 | [
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-... | 971 | 971 | |
Runge-Kutta of Order 4
March 6th 2009, 09:57 PM #1
Newbie
Joined
Jan 2009
Posts
10
Good day everyone,
Until now I cannot move on with these two problems. I don't even know where to start
1.) At time t, a pendulum makes an angle x(t) with the vertical axis. Assuming there is no friction, the equa... | 4 | [
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0.033447265625,
-0.06... | 972 | 972 | |
Defining Inner Products
October 5th 2011, 09:17 PM #1
Junior Member
Joined
Oct 2009
Posts
37
Defining Inner Products
Hi everyone,
This questions has been stumping me for a few days now. But the questions asks how I could define an inner product for a vector space V such that all the vectors in a bas... | 5 | [
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0.058... | 973 | 973 | |
Fixed norm problem for analytic functions
up vote 0 down vote favorite
Hi there,
I have the following problems on my hand:
Given arbitrary positive sub-harmonic function $l(x,y)$ on plane, for all analytic functions: $f=a(x,y)+ib(x,y)$ on complex plane, consider the equation:
$|f|^2=l$, i.e. $a^2+b^2=l$
1) for wha... | 5 | [
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Isomorphism
March 27th 2006, 12:17 PM
suedenation
Isomorphism
Does anyone know how to do this question?
In each of the following cases, decide whether or not the two rings are isomorphic.
(a) Z and Q.
(b) C and H.
(c) Z6 × R and R × Z6.
(d) Q and Q × Z2.
(e) R and C.
Thanks very muc... | 5 | [
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0.017456054687... | 975 | 975 | |
Problem with basic Linear Congruence
September 17th 2007, 09:23 PM #1
Junior Member
Joined
Aug 2007
Posts
28
Problem with basic Linear Congruence
Hi, I'm trying to find all solutions to the equation 4871x=(mod7642) (congruent with).
Using the euclidian algorithm on these numbers i get, 1 = 615 * 487... | 5 | [
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Math Help
why is "nCk + nCk-1" equal to " n+1Ck " ?
Algebriacally, well Assume $k \geq 1$ $n C k + n C (k-1) = \frac{n!}{(n-k)!k!} + \frac{n!}{(k-1)!(n-k+1)!}$ Observe that $(n-k+1)! = (n-k)!*(n-k+1)$ (1) so $\frac{n!}{(n-k)!k!} + \frac{k * n! }{k*
(k-1)!(n-k+1)!}$ (i can do this since k/k = 1) $\frac{n!}{(n-k)!k!} +... | 4 | [
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Homework Help
Posted by sweety on Friday, April 3, 2009 at 1:17am.
Oxygen gas having a volume of 784 cm3 at 23.3°C and 1.03 x 105 Pa expands until its volume is 1170 cm3 and its pressure is 1.07 x 105 Pa. Find (a) the number of moles of oxygen present and (b) the
final temperature of the sample. (Unit kelvin, K, for p... | 5 | [
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-0.0159912109375,
-0... | 978 | 978 | |
sicp-ex-2.11
Ben Bitdiddle should stick to diddling his own bits. His comment just obfuscates the code. But, if we know the signs of the endpoints, we have 3 possible cases for each interval: both ends positive,
both negative, or an interval spanning zero; therefore, there are 3x3 = 9 possible cases to test for, which ... | 4 | [
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0.03784179... | 979 | 979 | |
s and
Why are there so many formulas for the inverse of Mills’ ratio?
What if I have censoring from above/below in my Heckman selection model?
Title Mills’ ratios and censoring direction in the Heckman selection model
Author Vince Wiggins, StataCorp
Date May 1999; minor revisions July 2011
Someone asked about... | 4 | [
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is my solution correct ..
August 22nd 2009, 03:16 AM #1
MHF Contributor
Joined
Nov 2008
Posts
1,401
is my solution correct ..
here is a question:
http://i25.tinypic.com/8xlcfl.gif
there is endless wire uniformly charged $\lambda=2*10^{-4}C/m$
and close to it located a wire with $l=0.12_m$
... | 5 | [
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maths economics
May 22nd 2009, 06:33 AM #1
Newbie
Joined
May 2009
Posts
1
maths economics
hi, can someone please help me with this question, im really struggling with it.
"in a certain location, house prices are decreasing at the rate of 5% per annum. How long will they take to halve? if the rate of ... | 4 | [
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collector's choice
January 19th 2007, 01:47 AM
earboth
collector's choice
I collect old school books. They have the advantage that you don't need calculators or computers to solve the problems published in those books.
In an arithmetic and algebra exercise book from 1883 I found a way to solve this equation... | 4 | [
-0.0859375,
0.099609375,
0.0062255859375,
0.0283203125,
0.00157928466796875,
0.033935546875,
-0.040283203125,
0.0167236328125,
-0.00164794921875,
-0.02490234375,
0.052734375,
-0.052490234375,
0.07275390625,
0.01458740234375,
-0.049072265625,
0.03369140625,
-0.06640625,
0.0537109375... | 983 | 983 | |
Basic trig simplification
December 2nd 2009, 01:44 PM #1
Newbie
Joined
Oct 2009
Posts
23
Basic trig simplification
I am having the HARDEST TIME simplifying this into cos y
(1+cos y)/(1+sec y)
When I do it, I always end up with cos^2 y..
Thanks guys, appreciate it.
sec(y)=1/cos(y). Com... | 4 | [
-0.00823974609375,
0.0208740234375,
-0.030029296875,
0.048583984375,
0.0089111328125,
-0.053466796875,
-0.0308837890625,
-0.002044677734375,
0.0157470703125,
0.0281982421875,
0.09814453125,
0.041015625,
-0.07177734375,
0.076171875,
0.051513671875,
-0.004486083984375,
0.00024795532226... | 984 | 984 | |
Pre-Calc (exponential growth)
Posted by Phillip on Sunday, March 28, 2010 at 6:55pm.
A COLONY OF BACTERIA IS GROWN UNDER IDEAL CONDITIONS IN A LAB SO THAT THE POPULATION INCREASES EXPONENTIALLY WITH TIME. At the end of the three hours, there are 10,000 bacteria. At the end of the 5
hours, there are 40,000 bacteria. Ho... | 4 | [
-0.06591796875,
0.0054931640625,
0.0034027099609375,
0.0281982421875,
-0.0019378662109375,
-0.06982421875,
-0.0003490447998046875,
0.03515625,
0.034912109375,
0.0791015625,
0.1240234375,
-0.080078125,
0.001983642578125,
0.0791015625,
0.043701171875,
0.0191650390625,
-0.061279296875,
... | 985 | 985 | |
co-ordinate geometry
points (1,2),(3,-4),(5,-6) laying on the circumference of a circle,find the cordinate of centre?
Hello, Anjana, I assume that the equation of a circle in $\mathbb{R}^2$ with the centre $M(m_1, m_2)$ is: $(x-m_1)^2+(y-m_2)^2=r^2$ Now plug in the values yxou know. You'll get 3 equations: $(1-m_1)^
2... | 4 | [
0.031494140625,
-0.021240234375,
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0.038818359375,
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0.1025390625,
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0.059814453125,
0.001007080078125,
0.01806640625,
0.0027618408203125,
-0.03955078125,
0.06298828125,
-0.042236328125,
0.... | 986 | 986 | |
Homework Help
Posted by Shelby on Tuesday, December 11, 2012 at 9:09pm.
a tree grew at a 3 degree slant from the vertical. at a point 60 feet from the tree, the angle of elevation to the top of the tree is 14 degrees. find the height of the tree to the nearest tenth of a
foot.
• geometry - Reiny, Tuesday, December ... | 4 | [
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0.06347... | 987 | 987 | |
Simple number theory...need solutions
February 12th 2009, 10:41 AM #1
Junior Member
Joined
Apr 2008
Posts
47
Simple number theory...need solutions
1. Let n be the product of 2 large primes. Alice wants to send a message m to bob, where gcd(m,n)=1. Alice and Bob choose integers a, and b relatively prime t... | 4 | [
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0.0107421875,
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0.031494140625,
0.06689453125,
-0.0196533203125,
0.015869140625,
0.03759765625,
-0.003509521484375,
-0.01... | 988 | 988 | |
normal distribution prove OR disprove E[x]=μ
December 9th 2010, 05:13 PM #1
Member
Joined
Jan 2009
From
Kingston, PA
Posts
96
normal distribution prove OR disprove E[x]=μ
normal distribution prove OR disprove E[x]=μ
i believe the claim is true but i'm not sure how to go along to prove it...
... | 5 | [
0.03173828125,
-0.01239013671875,
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0.0033721923828125,
-0.059814453125,
0.01422119140625,
0.0302734375,
-0.030... | 989 | 989 | |
displacement and distance
December 22nd 2008, 02:06 PM #1
Junior Member
Joined
Dec 2008
Posts
28
displacement and distance
if i had a velocity function how would i find the displacement and distance traveled? the distance i'm guessing is an arclength but how do i find displacement? say $v(t) = 2t^2+3t+1$... | 5 | [
-0.018798828125,
-0.00537109375,
0.08203125,
-0.049560546875,
0.0029296875,
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-0.055419921875,
0.10498046875,
-0.0123291015625,
-0.01300048828125,
0.050048828125,
-0.05029296875,
-0.0299072265625,
0.055419921875,
-0.07421875,
-0.0028533935546875,
0.037353515625,
0.0091... | 990 | 990 | |
Truth tables for logic operations
Truth table for "NOT"
A bit-wise NOT operation performs the logical NOT operation on each bit of the input.
i.e.
bit 7[result] = NOT bit 7[input] ,
bit 6[result] = NOT bit 6[input] ...
For the 8-bit value 10110011 (base 2), this table shows the computation:
┌───────┬──────────────... | 4 | [
0.0159912109375,
0.034912109375,
-0.04833984375,
-0.0172119140625,
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0.01080322265625,
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-0.068359375,
0.042236328125,
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0.033935546875,
-0.0294189453125,
-0.031982421875,
0.0810546875,
-0.037841796875,
0.04... | 991 | 991 | |
Ratio problem.
March 2nd 2009, 07:13 PM #1
Newbie
Joined
Oct 2008
Posts
9
Ratio problem.
I hate to bump for such a simple problem, but could someone please enlighten me on how to do this problem?
The teacher didn't explain very well, so I've come here. If I try it out, I get
x^2 + 3 = 10 so t... | 4 | [
-0.048828125,
0.020751953125,
0.000843048095703125,
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0.01300048828125,
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0.02978515625,
0.1279296875,
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-0.00946044921875,
... | 992 | 992 | |
Height above ground at time t, of ferris wheel
April 7th 2011, 12:28 PM
sydewayzlocc
Height above ground at time t, of ferris wheel
You have been riding the London Ferris Wheel for 17 minutes and 30 seconds, and the diameter of the wheel is 450 feet. What is your height above the ground at this time? Any help wo... | 4 | [
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0.0206298828125,
-0.055908203125,
0.03... | 993 | 993 | |
Strawberry Cyclesport: Hinault/Genzling Frame Sizing Method
Hinault/Genzling Frame Sizing Method:
In the 1970's and 80's a study of professional cyclists was undertaken by
Frenchman Claude Genzling to develop a rational frame sizing technique. Genzling interviewed hundreds of pro road cyclists gaining body measureme... | 5 | [
0.06494140625,
0.125,
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0.017578125,
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0.0654296875... | 994 | 994 | |
Musical Set Theory
To generate a normal matrix for any set, write the pitch numbers of the set across the top of a page, and then write the same sequence of numbers down the side. For each cell in the matrix, add
its corresponding pitches on each axis and adjust the result to mod-12. Here's a simple example, t... | 4 | [
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0.04052734375,... | 995 | 995 | |
SAT questions I did not understand
January 7th 2010, 08:19 PM #1
Junior Member
Joined
Dec 2009
From
U.S
Posts
60
SAT questions I did not understand
Can someone give me an explanation for Q1? I am still confused.
Q1.
In a supermarket, Shakira bought 5 items from aisles 1 through 7, inclusi... | 4 | [
0.08056640625,
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0.00665283203125,
0.0257568359375,
0.023193359375,
0.00445556640625,
0.11328125,
-0.1044921875,
0.01611328125,
-0.00421142578125,
0.041748046875,
-0.05419... | 996 | 996 | |
Number of solutions of x^2 + xy + y^2 = 27 in Q
How many solution does the $x^2+xy+y^2=27$ equation have in the set of $\mathbb{Q}$?
Last edited by mr fantastic; September 25th 2010 at 02:19 AM. Reason: Edited title.
There are infinitely many rational solutions to this equation. One family of solutions comes from tak... | 5 | [
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0.003875732421875,
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0.0296630859375,
0.03955078125,
0.0003833770751953125,
0.03857421875,
-0.04394531... | 997 | 997 | |
General analysis of the mode interaction in multimode active fiber
« journal navigation
General analysis of the mode interaction in multimode active fiber
Optics Express, Vol. 20, Issue 6, pp. 6456-6471 (2012)
http://dx.doi.org/10.1364/OE.20.006456
Abstract
General analysis of the mode interaction in multimode fib... | 4 | [
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0.06640625,
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0.0... | 998 | 998 | |
Homework Help
Posted by Willow on Monday, February 23, 2009 at 4:29pm.
A train leaves Danville Junction and travels north at a speed of 75 km/h. Two hours later, a second train leaves on a parallel track and travels north at 125 km/h. How far from the station will they
meet?
I have no idea what the system of equation... | 4 | [
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-0.044921875,
-0.024169921875,
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0.04638671875,
0.058837890625,
-0.032958984375,
0.0439453125,
-0.041748046875,
-0.03076... | 999 | 999 |