content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Integer programming: converting to binary
April 11th 2009, 02:44 PM #1
Member
Joined
Jun 2006
Posts
93
Integer programming: converting to binary
Maximize 2X1 + 5X2
subject to X1 + X2 <= 15
-X1 + X2 <= 2
X1 - X2 >= 2
X1 + X2 >= 2
X1, X2 >= 0 and integer
I am supposed to convert th... | 5 | [
0.02783203125,
0.05908203125,
-0.031005859375,
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0.02001953125,
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0.0299072265625,
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0.024169921875,
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0.00885009765625,
0.10693359375,
0.03564453125,
-0.017211914... | 34,100 | 34100 | |
y=-2x+6 is the perpendicular bisector of the line segment
Author Message
TAGS:
y=-2x+6 is the perpendicular bisector of the line segment [#permalink] 25 Sep 2007, 23:36
y=-2x+6... | 4 | [
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Indefinite Integrals...I've got a good start but...
February 16th 2009, 11:36 AM #1
Member
Joined
Oct 2008
Posts
242
Indefinite Integrals...I've got a good start but...
A picture is attached...both involve substitution but what I don't understand is for the first one I know u would be e^7x and du would t... | 5 | [
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0.0208... | 34,102 | 34102 | |
Filling in table
October 5th 2009, 10:55 AM #1
Member
Joined
Oct 2009
Posts
123
Filling in table
Hey there, can someone help me out with this question?
Using graphing software, fill in the table below for this function f(x)= 12x3 - 5x2 - 11x + 6
What I need:
X intercepts
Degree of Poly... | 4 | [
0.0257568359375,
0.0016632080078125,
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Matrices
January 21st 2013, 03:20 AM
Tutu
Matrices
Hi Thank you all very much for your answers to my previous questions, really appreciate them. Unfortunately, I have one more..
Find the values of a for which the system of equations has a unique solution.
3x-ay+2z = 4
x+2y-3z = 1
-x-y+z = 12
... | 5 | [
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... | 34,104 | 34104 | |
[SOLVED] fundamental counting principal.
May 17th 2009, 10:52 AM
brentwoodbc
[SOLVED] fundamental counting principal.
I am alright at the questions where you are told how many objects there are, and are asked how many combinations there are of those objects. My question is what about when it says something
l... | 4 | [
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Bayesian network and distributions
September 24th 2012, 08:26 AM #1
Newbie
Joined
Sep 2012
From
Netherlands
Posts
8
Bayesian network and distributions
Hi,
I'm new when it comes to Bayesion networks and would be glad if someone could give me some hints on a problem.
I have the following prob... | 5 | [
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... | 34,106 | 34106 | |
Latin American applied research
Servicios Personalizados
Articulo
Indicadores
Links relacionados
Bookmark
versión impresa ISSN 0327-0793
Lat. Am. appl. res. vol.40 no.4 Bahía Blanca oct. 2010
LPV control of a magnetic bearing experiment
A.S. Ghersin^†, R.S. Smith^‡ and R.S. Sánchez Peña^§
^† Dpto. de Electr... | 4 | [
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-0.0815... | 34,107 | 34107 | |
Find the equation of the line
November 19th 2011, 11:02 AM #1
Senior Member
Joined
Jul 2008
Posts
313
Find the equation of the line
I am presented with coordinates (5,3) and (-7, 7). These coordinates as I understand are;
x = 5
y = 3
and
x = -7
y = 7
I have produced a graph, s... | 4 | [
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Canonical and Singular Propagation of Ultrashort Pulses in a Nonlinear Medium
International Journal of Optics
Volume 2012 (2012), Article ID 868274, 8 pages
http://dx.doi.org/10.1155/2012/868274
Research Article
Canonical and Singular Propagation of Ultrashort Pulses in a Nonlinear Medium
^1Department of Mathematics... | 4 | [
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833 Cents Scale
An 833 Cents Scale
An experiment on harmony
... | 4 | [
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Pressure/Area word problem of a oil tank help?
February 24th 2014, 06:38 PM #1
Member
Joined
Feb 2014
From
USA
Posts
231
Pressure/Area word problem of a oil tank help?
A cylindrical oil storage tank 12 feet in diameter and 17 feet long is lying on its side. Suppose the tank is half full of oil weighi... | 5 | [
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Ferris wheel!
July 12th 2008, 10:40 PM #1
Newbie
Joined
Jul 2008
Posts
10
Ferris wheel!
A spider attached itself to the point P on the side of car C when the point P was at its lowest point at 1.00pm.
The height, h meters, of the point P above ground level, at the time t hours after 1.00pm is given ... | 4 | [
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Differentiation Question
May 22nd 2008, 07:05 PM #16
f(2) from left equals 4+12+13=29
f(2) from right 2a+b
f'(2) from left equals 4+6=10
f'(2) from right equals a
so $a=10$
and $2a+b=29$
so a=10 and b=9
Wow, that was a lot easier than what I was trying to do. I knew it was somet... | 4 | [
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Baseball Stats
August 2nd 2007, 07:26 AM
Jonboy
Baseball Stats
Just out of curiosity does anyone here have the book: Algebra and Trig w/Analytic Geometry by Swokowski Cole?
I'm using the book and it doesn't explain the best but I only payed $15 for it so I'm satisfied.
Here's a problem I'm totally stum... | 4 | [
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Wolfram Demonstrations Project
Dirichlet L-Functions and Their Zeros
Dirichlet -functions are important in number theory. For example, -functions are used to prove Dirichlet's theorem, which states that the arithmetic progression () contains infinitely many primes,
provided and are relatively prime. The zeros of -func... | 4 | [
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Nth roots of unity
December 12th 2010, 09:17 AM #1
Junior Member
Joined
Nov 2010
Posts
37
Nth roots of unity
So here was my initial postulate:
Show that Q/Z is isomorphic to the multiplicative group U∗ consisting of all roots of unity in C. (That is, U∗ = {z ∈ C|zn= 1 for some n ∈ Z+}.)
This is... | 4 | [
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Mathematics
• Pre-requisite: While there are no specific pre-requisites, this course is intended for students at stage 3 of either an MSci or BSc Mathematics/Applied Mathematics and Physics/Theoretical Physics
pathways, and a mathematical knowledge and ability commensurate with this stage is assumed.
Introd... | 4 | [
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Modern Geometry: Proving Angles Congruent
February 22nd 2009, 01:52 PM
ilikedmath
Modern Geometry: Proving Angles Congruent
If WS = WT and RS = ST = TU, with R-S-T-U, prove that ∠RWS http://i42.tinypic.com/1222p20.gif∠TWU.
http://i39.tinypic.com/ehmz5e.jpg
My work so far:
Proof:
Given: WS = WT an... | 4 | [
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L'Hopital Rule
July 18th 2012, 10:02 PM #1
Junior Member
Joined
May 2010
Posts
35
L'Hopital Rule
1.) What is the limit of ( e^x - (1+x) ) / x^n as x approaches 0 from the right?
Using the L'Hopital rule, I'm a little confused with regard to the denominator.
2.) What is the limit of (squareroot(... | 5 | [
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BBA Basic Business Mathematics Previous Year Question Paper University of Pune 2009 model question papers
Download Model question papers & previous years question papers Awards & Gifts
... | 4 | [
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Another quad formula word prob
August 28th 2009, 05:30 AM #1
Junior Member
Joined
Oct 2008
Posts
42
Another quad formula word prob
Block 4 by 5 by 3 feet. Wants to reduce volume by shaving off the same amount from length width and height.
Could you give me a clue as to where I should start? I know I... | 4 | [
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0.10... | 34,121 | 34121 | |
Surds Help needed ASAP
January 4th 2008, 03:56 AM #1
Junior Member
Joined
Sep 2007
Posts
69
Surds Help needed ASAP
Hi im doing a past paper, and i was wondering how id do this surds question. Im not alowed to use a calculator.
Not sure how to use the equation tool btw so...
(Route 17) multiplied... | 4 | [
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Homework Help
Posted by please help me! on Tuesday, March 23, 2010 at 2:20pm.
Find the indicated binomial probabilities. Round to the nearest 3 decimal places.
In a local college, 20% of the math majors are women. Ten math majors are chosen at random.
1) What is the probability that exactly 2 are women?
2) What is ... | 4 | [
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Exact Analytical Solution for Suction and Injection Flow with Thermal Enhancement of Five Nanofluids over an
Isothermal Stretching Sheet with Effect of the Slip Model: A Comparative Study
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 721578, 14 pages
http://dx.doi.org/10.1155/2013/721578
Research Artic... | 5 | [
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-0.0... | 34,124 | 34124 | |
A Sextuple Product Identity with Applications
Mathematical Problems in Engineering
VolumeΒ 2011Β (2011), Article IDΒ 462507, 11 pages
http://dx.doi.org/10.1155/2011/462507
Research Article
A Sextuple Product Identity with Applications
^1Department of Mathematics, East China Normal University, Shanghai 200241, China
... | 5 | [
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0.034667968... | 34,125 | 34125 | |
Wind Resistance Problem
October 18th 2009, 02:50 PM
Caturdayz
Wind Resistance Problem
If a plane flying 60 degrees northeast at 200 km/hr is struck by a wind that blows due west at 50 km/hr, what angle must the plane fly to maintain the sixty degrees northeast bearing.
--
To be honest, I really have no ... | 4 | [
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... | 34,126 | 34126 | |
Homework Help
Posted by Bella on Wednesday, September 30, 2009 at 5:14pm.
A force sensor is used to measure a force applied to a 7.5 kg box on a hard, horizontal surface. It records that the box starts to move when the force is equal to 16.5 N. This force makes the box
start to move with an acceleration of 0.5 m/s2. F... | 4 | [
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... | 34,127 | 34127 | |
Countability Question
April 16th 2011, 11:54 AM
StaryNight
Countability Question
Prove the following assumption:
If C is a countable set and f: A->C is an injection, then A is countable.
I'm stuck on how to prove this, as I originally learnt it as the very definition of a countable set. Actually, I thi... | 5 | [
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Implicit Differentiation (iii)
The first derivative is correct $\frac{dy}{dx}=\frac{-y^{2}}{x^{2}}$ Now, continue from there by taking the derivative of that. BUT, do not forget to sub in what dy/dx equals. That is where many go
astray. Quotient rule: $\frac{x^{2}(-2y)\frac{dy}{dx}-(-y^{2})(2x)}{x^{4}}$ $\frac{-2y}{x^{... | 5 | [
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... | 34,129 | 34129 | |
Help in Solving a Trigonometric Equation
Here goes the equation: x/tan23 - x/tan32 = 10 Thanks in advance
Cheers for you swift reply. Any chance you could do a brief explanation on how you reached your answer because I am a newbie at solving such equations? P.S Did you make a mistake in the bracket
(tan23-tan32) becau... | 4 | [
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0.02954101... | 34,130 | 34130 | |
volumes of cylinders
August 15th 2010, 10:24 AM #1
Junior Member
Joined
Aug 2010
Posts
49
volumes of cylinders
a right circular cylinder has a diameter of 5.7 inches and a height of 6.4 feet
a.) what is the volume of the cylinder in ft^3?
b.) what is the volume of the cylinder in cubic metres?
... | 4 | [
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Row echelon form or Reduced row echelon form?
September 20th 2011, 03:00 PM #1
Member
Joined
Nov 2009
Posts
171
Row echelon form or Reduced row echelon form?
I am very new to linear algebra and am having a bit of trouble understanding exactly what reduced row echelon form and row echelon form mean. ... | 4 | [
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Solution of the Lane-Emden Equation Using the Bernstein Operational Matrix of Integration
ISRN Astronomy and Astrophysics
Volume 2011 (2011), Article ID 351747, 7 pages
http://dx.doi.org/10.5402/2011/351747
Research Article
Solution of the Lane-Emden Equation Using the Bernstein Operational Matrix of Integration
^1D... | 5 | [
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Euler problems/81 to 90
From HaskellWiki
Find the minimal path sum from the top left to the bottom right by moving right and down.
Solution:
import Data.List (unfoldr)
columns s = unfoldr f s
where
f [] = Nothing
f xs = Just $ (\(a,b) -> (read a, drop 1 b)) $ break (==',') xs
firstLine ls = sc... | 5 | [
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07. Future Value
Overview
To navigate this multi-page article:
Use the drop-down lists and arrow icons located at the top and bottom of each page.
Click here to download a copy of the
This article shows how Sage can take a single function with ... | 5 | [
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Maths Induction
May 6th 2010, 06:40 PM #1
Junior Member
Joined
May 2010
Posts
26
Maths Induction
Hi Everyone,
Still trying to grasp doing inductions, saw this question today but i got it completely wrong.
Any assistance would be most appreciative.
Using induction to pove that for all n≥4 ... | 5 | [
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What will be the dimension of the subspace of all symmetric matrices in 2x2matrices?
May 26th 2011, 09:34 AM #1
What will be the dimension of the subspace of all symmetric matrices in 2x2matrices?
We know by definition that If a vector space $W$ has a basis consisting of $n$ vectors, then the number $n$ is called... | 5 | [
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Calculus - Derivatives
Posted by UMich1344 on Monday, September 29, 2008 at 10:05pm.
The approximation to a definite integral using n=10 is 2.346; the exact value is 4.0. If the approximation was found using each of the following rules, use the same rule to estimate the integral with
n=30.
A) Left Rule
B) Trapezoid ... | 5 | [
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s
Background Notes
In considering plane stress i.e. stress in the x-y plane the z plane is assumed to be stress free Three dimensional stress analysis is similar in principle but a bit more complicated. The diagram
below represents a small point in a solid which is under stress in the x and the y direction. The poin... | 4 | [
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Homework Help
Posted by isha on Thursday, February 12, 2009 at 9:09pm.
the roots of 2x^2 - 3x = 4 are a and b. find the simplest quadratic equation which has roots 1/a and 1/b
• math - Reiny, Thursday, February 12, 2009 at 10:53pm
the sum of the roots of the original is 3/2
the product of the roots is -2
... | 4 | [
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-0.028076171... | 34,140 | 34140 | |
complex numbers - Equilateral triangle
March 27th 2009, 04:13 PM
stud_02
complex numbers - Equilateral triangle
a,b,c are complex numbers.
if abc is an Equilateral triangle,show
$a^2 + b^2 + c^2 = ab + bc + ca$
i cant thin of a equation about an Equilateral triangle. please help
March 28th 2009, 0... | 5 | [
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-0.013122558... | 34,141 | 34141 | |
Trigonometric differentiation help!
May 31st 2010, 08:16 PM #1
Junior Member
Joined
May 2010
Posts
36
Trigonometric differentiation help!
Hi, I'm having a lot of trouble solving the following question related to trig differentiation. I would greatly appreciate any help.
1) Differentiate $tan^2 (cos ... | 5 | [
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0... | 34,142 | 34142 | |
Find Eigenvectors in a 3x3-matrix
September 18th 2013, 10:32 AM
aprilrocks92
Find Eigenvectors in a 3x3-matrix
Hi,
I'm having trouble with finding the eigenvectors of a 3x3 matrix. The matrix M, is defined as the following:
0 0.3 0.4
0.6 0 0.6
0.4 0.7 0
Having found det(M - ... | 4 | [
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0.0... | 34,143 | 34143 | |
Math B problem (please help)
June 2nd 2005, 08:13 PM
max333
Math B problem (please help)
this is a Math B problem for June 2004 # 31. I have the answersheet but i cant figure out how they got the answer.
31 An archaeologist can determine the approximate age of certain ancient
specimens by measuring the ... | 4 | [
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-0.087... | 34,144 | 34144 | |
Math Help
September 21st 2011, 01:14 AM #1
Junior Member
Joined
Sep 2010
From
Oslo
Posts
57
Thanks
4
1+2+3+...+n
Hi, can anyone tell me why
1+2+3+...+n=n(n+1)/2
I can see that it works when I choose a number for n, but I don't really see how I could have come up with it myself.
Re: 1+... | 4 | [
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-0.0230712890625,
-0.0... | 34,145 | 34145 | |
Prove the equation won't be satisfied for any complex number Z?
April 30th 2009, 08:23 PM #1
Prove the equation won't be satisfied for any complex number Z?
If $|Z| < \frac{1}{3}$, then prove that the equation $1 + 2\cos^2 \theta_{1}Z + 2\cos^2\theta_{2}Z^2 + ... + 2\cos^2\theta_{n}Z^n = 0$, will not be satisfied... | 4 | [
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0.01324462890625,
-0.04809570... | 34,146 | 34146 | |
Solve y ′′ − 3 y ′ − 4 y = −3 x+5
June 2nd 2010, 10:43 PM
lemonlime
Solve y ′′ − 3 y ′ − 4 y = −3 x+5
Solve the differential equation
y ′′ − 3 y ′ − 4 y = −3 x+5
I've worked out the independent solution which is
r^2 - 3r - 4 = 0
(r + 1) (r - 4)
{e^(-1*x), e^(4*x)}
(as a set of functio... | 4 | [
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-0.0439453125,
-0.049560546875,
-0.... | 34,147 | 34147 | |
Math Help
March 14th 2011, 07:04 AM #1
Newbie
Joined
Feb 2011
Posts
24
Functions
I really don't get this...
If anyone could solve the following for me and explain every step it would be great.
If $f(2x-1)=x$ then $f(f(x))=?$
A journey towards my math enlightenment has begun
Denote $t... | 4 | [
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... | 34,148 | 34148 | |
Rouché's theorem
February 2nd 2011, 02:20 AM #1
Junior Member
Joined
Apr 2010
Posts
58
Rouché's theorem
Help me please with this one:
Locate the zeros of
$f(z)=e^{z}-4z^{2}+1 \;, \left \{ |z|<1 \right \}$
and show that they are simple
If it is compulsory to apply Rouche's theorem... | 4 | [
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0.01226806640625,
-... | 34,149 | 34149 | |
Parabolic problem
February 17th 2007, 02:04 PM #1
Junior Member
Joined
Jan 2007
Posts
40
Parabolic problem
If I had a parabolic reflector that had a width w=20 feet and a depth d= 4 feet, how far from the center would the focal point be?
The focal point, or focus, is "p" away from the vertex.
L... | 4 | [
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Complex number problem
March 22nd 2006, 04:38 AM #1
Junior Member
Joined
Mar 2006
From
Manchester
Posts
25
Complex number problem
Just wondering how i would solve (z^6) -2(z^3) +4 = 0 (where z is a complex number)
any help would be greatly appreciated.
Shaun
Shaun Gill
Just wonderi... | 4 | [
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0.011108398437... | 34,151 | 34151 | |
show that a set is closed
September 23rd 2013, 03:09 AM #1
Member
Joined
Sep 2010
From
Germany
Posts
112
Thanks
4
show that a set is closed
I have a set $A:=\{(x,x)|x\in[0,1]\}\subset [0,1]\times [0,1]$ i.e the diagonal of the unit square. How to show that A is closed??
By definition a set i... | 4 | [
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Pythagoras Question
January 28th 2013, 09:21 AM #1
Pythagoras Question
Hi All, Happy New-Year to everyone.
I've attached below a diagram of the question. My attempts at it have left me stumped...
I have to find the length AB and length AB= x
I started this off by finding length AC using pythagoras a... | 4 | [
0.035888671875,
0.09423828125,
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0.0361328125,
-0.02880859375,
0.0... | 34,153 | 34153 | |
Is my solution correct?
Last edited by CaptainBlack; April 16th 2010 at 02:54 AM.
Dear noteiler, You can't obtain, $C_{1}-\frac{1}{p}=\frac{y}{p^{2}}$ by integrating both sides of $\frac{dp}{p^2}=\frac{dy}{p^2}-\frac{2y}{p^3}$. This is because, $\frac{dp}{p^2}=\frac{dy}{p^2}-\frac
{2y}{p^3}dp$ $\int{\frac{dp}{p^2}}=\c... | 5 | [
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Homework Help
Posted by lauren on Thursday, March 22, 2007 at 12:20pm.
find all solutions in the interval [0,2 pi)
sin(x+(3.14/3) + sin(x- 3.14/3) =1
sin^4 x cos^2 x
Since sin (a+b) = sina cosb + cosb sina
and
sin (a-b) = sina cosb - cosb sina,
the first problem can be written
2 sin x cos (pi/3)= sin x
The sol... | 4 | [
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0.0301513671875,
-0.026123046875,
0.03369140625,
-0.08740234375,
0.03369140625,
0.031982421875,
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0.006622314453125,
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0.0400390625,
-0.05322265625,
0.053955078125,
0.037109375,
0.0184326171875,
0.01031494140625,
0.021240234375,
-0.0... | 34,155 | 34155 | |
Parallel and Perpendicular Lines in Polygons
Parallel and Perpendicular Lines
Topics
Fine, polygons are everywhere. They're unavoidable. But what do they have to do with parallel and perpendicular lines?
Well, let's have a look-see. Squares are made up of two sets of parallel line segments, and their four 90° angles... | 4 | [
-0.0142822265625,
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Solving Equations
Honors Geometry – This packet is due on the first day of class.
There will be a quiz on the first day of class on this material. If you have any questions as you work on this packet, please email the Geometry Honors lead teacher,(I may not answer right away in
July). This packet is worth 30 points (s... | 4 | [
-0.044189453125,
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Equation of tangent line (rec. form) to a polar curve!!
June 4th 2010, 12:42 PM #1
Equation of tangent line (rec. form) to a polar curve!!
Hello
Quesiton:
Find the rectangular form of the equation of the tangent line to the polar curve $r=cos^3(\theta)$ at the point corresponding to $\theta=\frac{\pi}{4}$... | 4 | [
-0.08251953125,
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0... | 34,158 | 34158 | |
Differential Equations Applications in Physics: Rising Balloon Problem
April 12th 2013, 11:35 PM #1
Newbie
Joined
Mar 2013
From
New York, NY
Posts
16
Differential Equations Applications in Physics: Rising Balloon Problem
A ball is released from a balloon at an altitude of 100 feet, The balloon at tha... | 4 | [
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0.08203125,
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Circles and Angle Bisectors again help plsss...
January 12th 2007, 07:18 AM #1
Senior Member
Joined
Jul 2006
From
Shabu City
Posts
381
Circles and Angle Bisectors again help plsss...
Hi, im still confused about inscribed circles , well heres the prob:
The sides of a triangle are on the lines $6x... | 4 | [
-0.049560546875,
0.0184326171875,
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0.0634765625,
0.025146484375,
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-0.046875,
-0.04... | 34,160 | 34160 | |
Proof by induction that 4| 5^n - 1
May 17th 2010, 09:46 AM #1
Proof by induction that 4| 5^n - 1
I have this problem that I know ( by just knowing ) that its true, but I have to prove by induction, and I am stuck on the induction step.
The question asks:
Use induction to show that 5^n - 1 (5 to the powe... | 4 | [
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0.056396484375,
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0.083984375,
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-0.026489257... | 34,161 | 34161 | |
Robust Backstepping Control for Cold Rolling Main Drive System with Nonlinear Uncertainties
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 387890, 7 pages
http://dx.doi.org/10.1155/2013/387890
Research Article
Robust Backstepping Control for Cold Rolling Main Drive System with Nonlinear Uncertainties
^... | 4 | [
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-0... | 34,162 | 34162 | |
egression)
I101: Introduction to Informatics
Lab 9: data analysis (linear regression)
Detailed Instructions for Tasks
Introduction
The aim of this lab is to understand and work with linear regression using Excel. Microsoft Excel has many powerful features for handling data analysis. Data analysis is complex, takes ... | 4 | [
-0.06396484375,
0.036376953125,
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0.0625,
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-0.020263671875... | 34,163 | 34163 | |
Help with identifying certain constraints in a Standard maximization Problem
December 11th 2007, 05:23 PM #1
Newbie
Joined
Dec 2007
Posts
2
i am asked to consider the following senario:
making a trail mix with particular ingredients: Peanuts, Raisins, M&Ms, Mini-preztels (x1+x2+x3+x4) respectively
... | 4 | [
0.01324462890625,
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0.004364013671875,
0.140625,
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integral
Challenge Problem: Show that $\displaystyle \int^{\infty}_{0} \frac{\cos (x^{2}) - \sin (x^{2})}{1+x^{4}} \ dx = \frac{\sqrt{2} \pi}{4e}$
I wonder whether the following fact is of any use here $\int_{0}^{\infty}e^{-y}\cos(x^2y)\;{dy} = \frac{1}{1+x^4}$ I'm not familiar with double integrals, unfortunately!
... | 5 | [
0.029296875,
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Robert Katz
Date of this Version
October 1971
Comments
Published in Third Symposium on Microdosimetry: Stresa (Italy), October 18-22, 1971. H. G. Ebert, ed. (Luxembourg: Commission of the European Communities, Directorate General for Dissemination of
Information, Centre for Information and Documentation - CID, 1972)... | 4 | [
0.03076171875,
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0.0218505859375,
-0.015625,
... | 34,166 | 34166 | |
Trigonometric equation:
December 15th 2008, 08:16 PM #1
Trigonometric equation:
I am trying to find the solutions for this equation.
I have worked it twice and keep getting different answers. Can someone show me step by step how to work it?
sin(2x)-cos(x)=0
Recall that $\sin\left(2x\right)=2\sin\left... | 4 | [
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0... | 34,167 | 34167 | |
Brazilian Journal of Physics
Services on Demand
Article
Indicators
Related links
Share
Print version ISSN 0103-9733
Braz. J. Phys. vol.37 no.1a São Paulo Mar. 2007
http://dx.doi.org/10.1590/S0103-97332007000100020
X (3872) in QCD sum rules
R. D. Matheus
Instituto de Física, Universidade de São Paulo, C.P. 66... | 4 | [
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0.01177978515625,
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Homework Help
Posted by Ms. Suzie on Monday, March 2, 2009 at 12:27pm.
1.A plane takes off at an angle of 6 degrees traveling at the rate of 200 feet/second. If it continues on this flight apth at the same speed, how many minutes will it take to reach a n altitude of
8000 feet?
2. A plane takes off at an angle of 5 d... | 4 | [
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-0.061767578125,
-0.... | 34,169 | 34169 | |
Probability, where am I going wrong?
May 19th 2010, 11:10 AM #1
Newbie
Joined
May 2010
Posts
7
Probability, where am I going wrong?
An urn contains 10 white and 5 red marbles. Three marbles are selected at random without replacement from the urn. Set up the probability distribution for the randomn variab... | 4 | [
0.0211181640625,
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0.06884765625,
-0.0294189453125,
0.040771484375,
0.03662109375,
... | 34,170 | 34170 | |
Homework Help
Posted by jack on Monday, August 23, 2010 at 4:15am.
It took a faster runner 10 sec. longer to run a distance of 1500 m than it took a slower runner to run a distance of 1000 m.If the rate of the faster runner was 5 m/sec more than the rate of the
slower runner,what was rate of each?
• math - drwls, M... | 4 | [
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... | 34,171 | 34171 | |
Homework Help
Posted by Physics on Friday, September 18, 2009 at 9:18pm.
I gues I'm looking at this the wrong way i do not understand the work you do to get to the answer
Question:
Find the air velocity of a plane that must have a realtive ground velocity of 250.0 h^-1 km norht if it encounters a wind pushing it tow... | 4 | [
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-0.... | 34,172 | 34172 | |
Few HW problems involving Logs, Natural logs, and Continuity.
February 12th 2011, 03:38 PM #1
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Joined
Feb 2011
Posts
7
Few HW problems involving Logs, Natural logs, and Continuity.
Hi. I'm having problems with a few HW problems.
1) log5 (x) + log5 (x+4) = ?
How would I solve this? I get a... | 4 | [
-0.03173828125,
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0.0203857421875,
-0.07861328125,
-... | 34,173 | 34173 | |
Couple differential equations
February 1st 2011, 02:14 PM #1
Junior Member
Joined
Oct 2009
Posts
48
Couple differential equations
Hey guys, Ive been doing some Diffy Q work and I have a few problems I am stuck with. I figured id post up some of the ones Im stuck on and hopefully someone can help. Im havi... | 5 | [
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-0.08105... | 34,174 | 34174 | |
Webwork assistance
November 13th 2013, 05:49 AM #1
Newbie
Joined
Nov 2013
From
Pittsburgh
Posts
3
Webwork assistance
I have solved a few math problems for my webwork homework, yet when I enter them into the website it tells me my answers are wrong and I am becoming quite frustrated, can anybody help ... | 5 | [
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-0.008056640625,
-0.031005859375,
0.022... | 34,175 | 34175 | |
Homework Help
Posted by michelle on Tuesday, May 1, 2007 at 8:27pm.
How do you find: cot(-5pie/4)?
you have to know that cotx = 1/tanx
so you could just trustfully change your calculator to radians
enter 5*pi/4, press =, press +/-,
then press Tan, =, then the 1/x key
you should get -1
or...
you could do it the ... | 4 | [
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-0.08154296875,
-0.020141... | 34,176 | 34176 | |
0327-0793 0327-0793 S0327-07932011000100001 00 01 2011 00 01 2011 41 1 1 9 ARTICLES
Efficient non homogeneous CFAR processing
N.B. Galvez^†, J.E. Cousseau^†, J.L. Pasciaroni^† and O.E. Agamenoni^†∇
^† SIAG -Servicio de Análisis Operativos, Armas y Guerra Electrónica
Base Naval Puerto Belgrano -Av. Colón s/n -(8111) ... | 4 | [
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-0.079589843... | 34,177 | 34177 | |
Probability winning lottery
December 18th 2006, 06:45 PM
Luv
Probability winning lottery
I really ned help with this math question.
1. What are your chances of winning a lottery of 45 numbers if 7 numbers wins it?
December 18th 2006, 07:10 PM
ThePerfectHacker
Quote:
Probability is the ratio of... | 4 | [
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-0.1181640625... | 34,178 | 34178 | |
Hopefully a simple f'(x) sign diagram question...
March 25th 2009, 07:52 AM #1
Newbie
Joined
Jan 2009
Posts
21
Hopefully a simple f'(x) sign diagram question...
my teacher did a bad job of explaining how to do the sign diagrams for f'(x).
i know that you need to find the critical points and then put... | 4 | [
0.004119873046875,
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-0.... | 34,179 | 34179 | |
Homework Help
Calculus - MathMate, Tuesday, May 8, 2012 at 2:14pm
Work done by a force F along a vector P is F.P (dot product). So total work done is
F.P + F.A
where A=<1,-3,4>, P=<7-1, 2-(-3), 5-4>
and F=15<1,2,2>/sqrt(1^2+2^2+2^2)=<5,10,10>
The division by sqrt(...) is required to normalize the direction vector to a... | 5 | [
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... | 34,180 | 34180 | |
Homework Help
Posted by Anonymous on Monday, March 25, 2013 at 7:53pm.
I'm stuck on 2 problems I know the answers but need to learn to show the work.
X^4+x^3=16-8x-6x^2. Answer: -2,1,+-√8
3x^3+4x^2+6=x. (-2,1/3, i√8/3)
Please help so I know how to figure these equations out.A big THANKS
• college algebra - Reiny... | 5 | [
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Logarithmical Regularity Criteria of the Three-Dimensional Micropolar Fluid Equations in terms of the Pressure
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 395420, 13 pages
http://dx.doi.org/10.1155/2012/395420
Research Article
Logarithmical Regularity Criteria of the Three-Dimensional Micropolar Flu... | 5 | [
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-0.150390625,
-0.0147705078... | 34,182 | 34182 | |
Ideal
November 11th 2006, 06:21 PM
JaysFan31
Ideal
Let R be any commutative ring and let a1,......,an be elements of R. We define
(a1,.....,an) to be the set {r1a1+...rnan for all i, ri in R}.
Prove that (a1,......,an) is an ideal of R. We call it the ideal generated by a1,......, an.
I appreciate a... | 5 | [
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Volume and Surface Area of a Sphere
October 22nd 2011, 07:59 AM #1
Member
Joined
Oct 2008
Posts
131
Volume and Surface Area of a Sphere
If the volume of the sphere doubles, what is the ratio of the surface area of the new, larger sphere to the old, smaller sphere? The answer is 2^(2/3). A good method for... | 4 | [
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Homework Help
Posted by Christy on Wednesday, December 15, 2010 at 1:04am.
There are a total of 107 foreign language students in a high school where they offer only Spanish, French, and German. 42 take Spanish.
46 take French.
45 take German.
8 take Spanish and French but not German.
8 take Spanish and German but ... | 4 | [
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... | 34,185 | 34185 | |
Determine an equation
October 28th 2012, 08:29 PM #1
Junior Member
Joined
Aug 2012
From
Winnipeg
Posts
57
Determine an equation
Hey guys,
the task:
If you drink a cola and an energy drink, you consume 111 mg of caffeine. The energy drink has 6 more than twice the number of mg of caffeine as ... | 4 | [
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0.06298828125,
-0.00201416015625,
0.0169677734375,
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0.036376953125,
0.0201416015625,
0.0296630859375,
-0.044189453125,
-0.015014648... | 34,186 | 34186 | |
Rearranging fractions to isolate function
May 12th 2012, 06:17 AM #1
Newbie
Joined
Feb 2009
Posts
11
Rearranging fractions to isolate function
I'm working through past papers for A-Level C3 maths and i'm stuck on how the answer book arrived at the following rearrangement.
$\frac{\tan^2\theta-3}{1-3\... | 4 | [
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0.00408935546875,
0.00... | 34,187 | 34187 | |
Homework Help
Posted by jane on Friday, April 22, 2011 at 10:26pm.
Express all the solutions to the following equations in a + bi form:
(a) z^2 +2z+4 = 0
(b) z^3 −8 = 0 [Hint: z^3 −8 = (z−2)(z^2 +2z+4)]
(c) 2z+iz = 3−i
thank you!
• math - MathMate, Friday, April 22, 2011 at 11:03pm
I'll do the first one:
... | 4 | [
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0.01153564453125,
-0.03125,
-0.064... | 34,188 | 34188 | |
j x k , vectors
May 27th 2010, 10:37 AM #1
Newbie
Joined
Sep 2009
Posts
9
j x k , vectors
Okay, I turned in a piece of homework the other day and my teacher said that I got one wrong. I was asked to solve for j x k or <0, 1, 0> x <0, 0, 1>. I said that the answer was i (<1, 0, 0>).
But, try as I migh... | 4 | [
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-0.00302124... | 34,189 | 34189 | |
More Homework Help
October 12th 2009, 03:22 PM #1
Newbie
Joined
Oct 2009
Posts
21
More Homework Help
Let C be the set of cities in the US with populations greater than 200,000 and let L be the relation on C defined by xLy (i.e., (x,y) are members of L) if and only if the population of x is not
greate... | 5 | [
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Statistics Problem
June 19th 2009, 02:20 AM
tikimasala
Statistics Problem
A car fleet of a delivery company consists of 145 cars.
Data recorded during the last month shows that the mean fuel consumption of cars is 6 liters per 100 km with standard deviation 1.4 liters and exhibit Uniform Distribution.
... | 5 | [
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0.01092529296875... | 34,191 | 34191 | |
cartesian coordinates / two circles
April 8th 2010, 02:06 AM #1
Newbie
Joined
Apr 2010
Posts
3
cartesian coordinates / two circles
hello,
I have two circles with known r1 & r2 radii.
I know the centers cartesian coordinates C0(a0,b0) & C1(a1,b1).
I know the distance "d" between centers of Ci... | 4 | [
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-0.03100... | 34,192 | 34192 | |
Lessons In Electric Circuits -- Volume II
Lessons In Electric Circuits -- Volume II
Chapter 4
REACTANCE AND IMPEDANCE -- CAPACITIVE
Pure resistive AC circuit: voltage and current are in phase.
If we were to plot the current and voltage for a very simple AC circuit consisting of a source and a resistor, (Figure... | 5 | [
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Exponential dist expected value help
October 21st 2009, 11:00 PM
Danneedshelp
Exponential dist expected value help
Q: The length of time Y necessary to complete a key operation in the construction of houses has an exponential distribution with mean 10 hours. The formula $C=100+40Y+3Y^{2}$ relates the cost C
... | 5 | [
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Inequality questions - multiple choice.
July 23rd 2010, 11:33 PM #1
Newbie
Inequality questions - multiple choice.
Last edited by mr fantastic; July 24th 2010 at 02:55 PM. Reason: Re-titled, many posts in this thread have been moved from a thread created by a duplicate posting of this question.
To #1:
... | 4 | [
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-0.05590... | 34,195 | 34195 | |
Rates of Change
March 19th 2009, 06:14 AM #1
Junior Member
Joined
Jan 2009
Posts
43
Rates of Change
1) s(t) = (t^3) - 8t + 1
Find the displacement during the first 3 seconds.
Do I find s(3) and s(1) and subtract the two? Or what?
2) At what value or values of t does the particle change di... | 4 | [
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0.0541992187... | 34,196 | 34196 | |
Isomorphism of kernel question
February 20th 2013, 04:52 PM #1
Junior Member
Joined
Oct 2012
From
Ohio
Posts
48
Isomorphism of kernel question
Consider the linear transformation T: V (+) W ---> V given by T(v,w) = v. Show that ker(T) is isomorphic to W. [V (+) W is the Cartesian sum or direct sum]
... | 5 | [
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Homework Help
Posted by lee pearce on Tuesday, June 22, 2010 at 2:54pm.
function y=4-2sin(2t+pi/2), where t is measured in radians. choose one option which gives the value of the function when t=pi radians.
a)0 b)1 c)2 d)4 e)pi/4 e)pi/4 f)pi/2 g)pi h)2pi
• Trigonometry - Reiny, Tuesday, June 22, 2010 at 4:01pm
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limit, sequence, exists
April 15th 2009, 06:49 PM
zelda2139
limit, sequence, exists
Define $a_n = 1+\frac{1}{2}+\frac{1}{3}+ \cdots + \frac{1}{n} - \int^n_1 \frac{1}{t}dt$. Prove that $a=\lim_{n \rightarrow \infty} a_n$ exists and $0<a<1$.
Attempt
My issue is the integral in the sequence. I don't know ho... | 5 | [
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