content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Homework Help
Posted by marie on Friday, October 8, 2010 at 6:56am.
A 72.0 kg piece of a satellite left over from an explosion with zero orbital velocity in space falls from a distance of 190 above the surface of the earth down toward earth. It arrives with 29.5 Km
(M="mega") kinetic energy on earth. How many MJ energ... | 4 | [
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0.0072326... | 300 | 300 | |
Homework Help
Posted by Steph on Friday, November 26, 2010 at 5:02pm.
A rock stuck in the tread of a 57.0 cm diameter bicycle wheel has a tangential speed of 3.00 m/s. When the brakes are applied, the rock's tangential deceleration is 1.40 m/s^2.
A) What is the magnitudes of the rock's angular acceleration at t=1.60 ... | 5 | [
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0.0... | 301 | 301 | |
maths (trigonometry)
Posted by marley on Monday, June 6, 2011 at 11:53pm.
please solve these if possible
Q1. If sinx +siny=3(cosy-cosx) then the value of sin3x/sin3y.
Q2. If sina ,cosa,and tan a are in g.p.then cos cubea+cos square a is equal to
• maths (trigonometry) - Anonymous, Tuesday, June 7, 2011 at 1:43am
... | 4 | [
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0.0390... | 302 | 302 | |
Is this done correctly?
September 16th 2007, 02:44 PM #1
Junior Member
Joined
Sep 2007
Posts
64
Is this done correctly?
A tank contains 300 gal of salt free water. A brine containing .5lb of salt per gallon of water runs into the tank at the rate of 2 gal/min and the well stirred mixtur runs out at the r... | 5 | [
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The Arrangement of Atoms in Crystalline Solids
Because a crystalline solid consists of repeating patterns of its components in three dimensions (a crystal lattice), we can represent the entire crystal by drawing the structure of the smallest
identical units that, when stacked together, form the crystal. This basic repe... | 5 | [
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solve equation
April 12th 2010, 11:17 AM #1
Newbie
Joined
Apr 2010
Posts
2
solve equation
0.5Q^2+24Q-Q^1.5-100=0
find 2 roots and maximum plz step by step
plz tell me if i am in wrong forum
this was tried by many ppl still a failure
No wonder: it is an irrational function and to fi... | 4 | [
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... | 305 | 305 | |
Re: st: How to test for equality of variance in data with sampling weigh
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]
Re: st: How to test for equality of variance in data with sampling weights
From Steven Samuels <ssamuels@albany.edu>
To statalist@hsphsun2.harvard.edu
Subject Re:... | 5 | [
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Homework Help
Posted by Bob on Tuesday, January 22, 2008 at 8:21pm.
How can I explain how I figured out the 99th Triangular Number?
I'd appreciate it if it is as simple as possible.
• Math - drwls, Tuesday, January 22, 2008 at 8:45pm
Did you figure it out? What did you get? Are you referring to the series of ... | 4 | [
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... | 307 | 307 | |
Homework Help
Posted by vaughn on Monday, January 7, 2013 at 8:56am.
A moving point is always equidistant from (5,3) and the line 3x+y+5=0. What is the equation of its locus?
Please help. how to do this problem?
• geometry - Steve, Monday, January 7, 2013 at 10:02am
the distance of the point (h,k) from the li... | 4 | [
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Finding a question related to 'finding the square' difficult
August 3rd 2012, 08:47 PM #1
Newbie
Joined
Aug 2012
From
London
Posts
22
Finding a question related to 'finding the square' difficult
I'm currently partaking a distance learning course in A-level mathematics, and have reached chapter 4 in P... | 4 | [
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PLEASE COULD SOMEONE HELP ME OUT
Posted by John on Monday, February 25, 2013 at 5:50pm.
Two long straight aluminum wires, each of diameter 0.30mm, carry the same current but in opposite directions. They are suspended by 0.50m long strings...If the suspension strings make an angle of 3.0
degree with the vertical, what ... | 5 | [
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What is an example of a σ - algebra of subsets of R?
December 30th 2009, 01:05 AM #1
Junior Member
Joined
Oct 2009
Posts
39
What is an example of a σ - algebra of subsets of R?
Here R represents the real numbers.
Let B represent a σ - algebra (sigma algebra)
Then i know that two examples are:
... | 4 | [
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LEESON Canada: Reference
EPACT and Motor Testing
Understanding IEEE 112 Method B (or CSA C390)
The goal of all of EPACT (Energy Policy Act) legislation is, of course, energy savings. This is to be accomplished by improving energy efficiency or using less energy to perform the same task. To
demonstrate or prove a produ... | 4 | [
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Simple Taylor series problem
February 14th 2009, 05:41 PM #1
Simple Taylor series problem
Hi i just got introduced to Taylor and Maclaurin series in my calculus class and it was a very short explanation at the end of class. When i got to do doing my homework i found i had no idea
where to begin, can someone h... | 5 | [
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In general, the Quantile Functions (sometimes referred to as Inverse Density Functions or Percent Point Functions) return the Value X at which P(X) = [specified cumulative probability], given that
particular distribution.
1. IDF_Beta: This function takes the specified probability and returns the va... | 4 | [
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Gormley & Matsa (2013)
Implementing Fixed Effects Estimation
Our purpose in writing this paper was to examine the econometrics underlying the ad hoc estimation methods commonly used to account for unobserved heterogeneity in the finance l... | 5 | [
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The table above shows the total sales recorded in July for
Author Message
TAGS:
The table above shows the total sales recorded in July for [#permalink] 01 Feb 2012, 07:01
... | 4 | [
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Homework Help
Posted by Anonymous on Monday, July 1, 2013 at 1:23am.
I don't understand this,so can you please explain more clearly. Where did you get the 1/5?
1.The point P divides the interval joining A(-1,-2) to B(9,3) internally in the ratio 4:1. Find the coordinates of P.
• MATH - Kuai, Monday, July 1, 2013 a... | 4 | [
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Dogs from Planet Mars
Géza Kós
Dogs from Planet Mars
(Published in KöMal, 1996/3, pp. 138-144.)
The game to be introduced here was invented by Eward F... | 4 | [
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Homework Help
Posted by jessica on Thursday, February 2, 2012 at 8:14pm.
use the discriminant to solve for the smallest value of b that would make the roots of the equation x^2+bx+5=o imaginary
• trig - Brianna, Thursday, February 2, 2012 at 8:17pm
is this algebra or pre-algebra
• trig - Reiny, Thursday, Fe... | 4 | [
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Homework Help
Posted by Fredrick E. on Tuesday, November 1, 2011 at 2:35pm.
find all points on the curve x^2y^2+xy=2 where the slope of the tangent line is -1
I know that you have to find the derivative when it equals -1
i got
y'=(2x*y^2-y)/(2x^2*y+x)
(i don't know if it is correct or not)
but i don't know how to... | 5 | [
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Homework Help
Posted by Vidal on Sunday, October 15, 2006 at 2:06am.
Intergrate ¡ì sec^3(x) dx
could anybody please check this answer. are the steps correct? thanks.
= ¡ì sec x d tan x
= sec x tan x - ¡ì tan x d sec x
= sec x tan x - ¡ì sec x tan^2(x) dx
= sec x tan x + ¡ì sec x dx - ¡ì sec^3(x) dx
= sec x tan x... | 5 | [
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Analytic Geometry
Posted by Lance on Monday, January 21, 2013 at 4:40am.
What are the equations of the circles tangent to the x-axis, of radius 4 and whose center is at (-2,y)
Please help, how do I solve this problem?
• Analytic Geometry - Reiny, Monday, January 21, 2013 at 10:37am
Since (-2,0) must be on the... | 4 | [
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Recurring decimals take a fraction of effort
Q. A student asked me how to change recurring decimals to fractions but I've forgotten how. Could you show me the method?
A. Students sometimes get confused and wrongly think that "recurring decimals" are irrational numbers (numbers that can't be written as a fraction). A ... | 4 | [
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Pi a la Mode.
Link/Page Citation
Mathematicians tackle the seeming randomness of pi's digits
Memorizing the digits of pi--the ratio ... | 4 | [
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Bond Valuation — Calculation
Bonds can be purchased at any time. To value the bond, the procedures differ depending on whether the bond is purchased on the date interest is regularly paid (interest date) or whether it is
purchased “between interest dates”.
Formula to be used:
PP = R[1-(1+i)^-n]
—————— + RD ... | 5 | [
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Homework Help
Posted by Jeremy on Monday, August 17, 2009 at 2:15pm.
1. Identify the conic section represented by: 9y^2+4x^2 - 108y+24x= -144?
Is it ellipse.
2. Find the coordinates of the vertex and the equation of the axis of symmetry for the parabola represented by: x^2 + 4x - 6y + 10 = 0.
vertex: (-2 , 1)
axis... | 4 | [
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SparkNotes: Numbers & Operations: Ratios
Ratios
Math teachers love to use pizza slices to teach fractions and ratios. Who are we to argue with tradition? Consider a humble eight-slice pizza. You eat three pieces, and your imaginary buddy,
Kronhorst, eats the other five. (Imaginary friends don’t have to worry about gai... | 4 | [
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Computing Integrals
The natural rules for the definite integral of sums and constant multiplies of functions, i.e.
sumrule, constmult
f (x) + g(x))dx = f (x)dx + g(x)dx
... | 4 | [
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-0.00933837890625,
-0.037353515625,... | 328 | 328 | |
Homework Help
Posted by angela on Sunday, July 8, 2012 at 11:53pm.
Construct a truth table for (qvp)__> ~q
• geometry - MathMate, Monday, July 9, 2012 at 2:22pm
The truth table for ~q is the opposite:
q ~q
T F
F T
The truth table for conditional, p→q is true except when p is true and q is fals... | 4 | [
-0.045654296875,
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0.0771484375,
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0.0281982421875,
0.06884765625,
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... | 329 | 329 | |
numpy.dot
For 2-D arrays it is equivalent to matrix multiplication, and for 1-D arrays to inner product of vectors (without complex conjugation). For N dimensions it is a sum product over the last axis of a
and the second-to-last of b:
a : array_like
First argument.
b : array_lik... | 5 | [
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0.078125,
-0.00518798828125,
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Homework Help
Posted by Erica on Tuesday, October 3, 2006 at 12:18pm.
The surface ares S (in square meters) of a hot air ballon is given by s(r)=4 pi r^2 where r is radius of balloon (in meters). If the radius r is increasing with time (in seconds) according to the
formula r(t) = 2/3t^3, t is greater than or equal to ... | 4 | [
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... | 331 | 331 | |
Recursive descent parsing is better than LL(1)
jan@klikspaan.si.hhs.nl
Fri, 22 Jan 1993 16:41:50 GMT
From comp.compilers
| List of all articles f... | 4 | [
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Limit of Functions
April 21st 2012, 05:05 PM #1
Member
Joined
Mar 2012
From
USA
Posts
92
Limit of Functions
Negate the definition of the limit of a function, and use it to prove that for the function
f : (0; 1) --> R where f(x) 1/x, lim x-->0 f(x) does not exist.
I think I have the negation,... | 4 | [
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-0... | 333 | 333 | |
Homework Help
Posted by Lena on Wednesday, January 23, 2008 at 9:55pm.
When completing the square:
5x^2 + 10x - 20
5 ( x^2 + 2x) -20 = 0
5 ( x + 1)^2 -15 = 0
Did I do that right? If so I have another question. When it's in this form, -15 is the y-coordinate of the vertex and 2 the x coordinate of the vertex? If so... | 4 | [
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0.11181640625,
-0.042236328125,
0.056884765625,
-0.04052734375,
0.00848388671875,
... | 334 | 334 | |
Klein Bottle
I were thinking about various geometric surfaces with Klein bottle topology, such as the most famous one(that looks like bottle), figure 8, and others. (there you can see good collection)
and have discovered (or likely rediscovered) this elegant 4D surface with Klein bottle topology:
eq 1;
x=sin(α)*(1+a*... | 4 | [
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-0.0378417968... | 335 | 335 | |
Tests for proportions,
The standard test for a simple proportion, p, is based on the use of the Binomial distribution or a z-transform of the data for large sample sizes. Tests for multiple proportions typically are based
on the chi-square distribution, as used in contingency table analysis. With multiple proportions ... | 4 | [
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(αβ)(αγ)(βγ) = α²βγ+αβ²γ+αβγ² = [{α}/{αβγ}] + [{β}/{αβγ}] + [{γ}/{αβγ}]; No?
September 3rd 2009, 10:44 PM #1
Newbie
Joined
Aug 2009
Posts
19
(αβ)(αγ)(βγ) = α²βγ+αβ²γ+αβγ² = [{α}/{αβγ}] + [{β}/{αβγ}] + [{γ}/{αβγ}]; No?
---------------------------------------------------------------------------------------... | 4 | [
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187. The Geometry of Nature: An Introduction to Fractals
By Edyta Patrzalek , Stan Ackermans Institute, IPO, Centre for User-System Interaction, Eindhoven University of Technology
Abstract
Fractals is a new branch of mathematics and art. Perhaps this is the reason why most people recognize fractals only as pretty ... | 4 | [
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0.010070800781... | 338 | 338 | |
math (calculus) PLZZZ help!
Posted by Anonymous on Monday, April 5, 2010 at 5:01pm.
Consider the function below. (Round the answers to two decimal places. If you need to use - or , enter -INFINITY or INFINITY.)
f(x) = e^x/1+e^x
find the horizontal and vertical assymptotes?
find the interval whr f is increasing?
Fi... | 5 | [
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Homework Help
Posted by Jaskiran on Sunday, January 29, 2012 at 10:15am.
A pilot flies a plane that averages approximately 210 km/hr. The plane leaves point A at a bearing of 40 degrees and flies two hours to point B. After a brief stop the plane leaves point B at a
bearing of 125 degrees and flies for another 30 minu... | 4 | [
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... | 340 | 340 | |
Simplifying polynominals
July 5th 2013, 08:35 PM
Welkin
Simplifying polynominals
Hi all, I've gone through the 'read before' threads so I hope this is in the right section and that I've typed it out ok, I'm still working with pen and paper here (Happy)
Basically I've just started to get back into mathematic... | 4 | [
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-0.052978515625,
... | 341 | 341 | |
Basic questions about integration by substitution
February 3rd 2013, 10:54 AM
jojo7777777
Basic questions about integration by substitution
1. How does it possible for ∫sin(x)cos(x) dx to have two different solutions, namely (1/2)*(sin^2x)+c and -(1/2)*(cos^2x)+c, so that would bring to (rediculous) conclusion t... | 4 | [
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... | 342 | 342 | |
Homework Help
Posted by Andrew on Tuesday, November 20, 2012 at 6:48am.
Beth Dahlke is taking a ten question multiple choice test for which each question has three answer choice only one of which is correct. Beth decides on answers by rolling a fair die and making the
first answer choice if the die shows 1 or 2 the se... | 5 | [
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SNR enhancement through phase dependent signal reconstruction algorithms for phase separated interferometric signals
« journal navigation
SNR enhancement through phase dependent signal reconstruction algorithms for phase separated interferometric signals
Optics Express, Vol. 15, Issue 16, pp. 10103-10122 (2007)
http:... | 4 | [
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Homework Help
Posted by Jossie on Thursday, March 21, 2013 at 4:19am.
determine the general solution...2.sin(2x+30)=tan 135
• mathematics - Reiny, Thursday, March 21, 2013 at 9:40am
The 135 suggests that you are working in degrees, so
2 sin(2x+30) = tan 135°
2sin(2x+30) = -1
sin(2x + 30) = -1/2
... | 4 | [
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Homework Help
Posted by Casey on Saturday, March 3, 2012 at 2:48pm.
A sporting goods store sells 100 pool tables per year. It costs $20 to store one pool table for a year, based on the average inventory on hand. It costs $40 for each delivery of pool tables. How many
times per year and in what lot size should the stor... | 5 | [
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-0.086... | 346 | 346 | |
Tricky sin equation
April 23rd 2010, 12:32 AM #1
Newbie
Joined
May 2008
Posts
12
Hello!
This is the equation Im stuck with:
$2sin (0.5x) = 3/3x+2$
Im not sure where to start, because I cant take out any of the x values,
should i let 0.5x be a completely new vale like 'y' and but then i ... | 5 | [
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Homework Help
Posted by nicholas on Tuesday, June 5, 2007 at 5:19pm.
help with solving a magic square
http://www.jiskha.com/display.cgi?id=1125461237.1125498843
MAGIC SQUARES
Magic squares, those seemingly innocent looking collections of numbers that have fascinated so many for centuries, were known to the ancients... | 5 | [
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... | 348 | 348 | |
Linear fixed- and random-effects models
Stata fits fixed-effects (within), between-effects, and random-effects (mixed) models on balanced and unbalanced data. We use the notation
y[i,t] = X[i,t]*b + u[i] + v[i,t]
That is, u[i] is the fixed or random effect and v[i,t] is the pure residual.
xtreg is Stata's fe... | 5 | [
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0.0130615234375,
-0.0473... | 349 | 349 | |
Homework Help
Posted by Chirs on Thursday, February 19, 2009 at 10:49pm.
Were doing factoring and i dont get these (^ means squared)
1) m^-3m-2
2) 6c^-5c-4
3) ab+mn+an+mb
4) The length of a rectangular garden is 5ft more than the width. The garden has a 3ft wide cement walk sorrounding it. The total area of the ga... | 4 | [
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0.083984375,
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0.051025390625,... | 350 | 350 | |
Homework Help
Posted by galileo on Monday, January 15, 2007 at 8:48pm.
Suppose that the displacement of a particle is related to time according to the expression delta x = ct^3. What are the SI units of the proportionality constant c?
My answer: delta x = ct^3
m = c s^3 (s: seconds)
m/s^3= c
The SI units for c: m/... | 4 | [
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0.096679... | 351 | 351 | |
Tricky Trig Task
February 9th 2009, 10:43 AM
jamm89
Trionometry with a bit of pythag
Hi i am new here.
Can anyone point me in the right direction on this one please
http://i75.photobucket.com/albums/i3...scan0002-1.jpg
b=15.7
I have gone as far as splitting the 2 triangles up and labeling the 2
... | 4 | [
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Algebra-- PLEASE help!
Posted by Faith on Friday, May 22, 2009 at 3:40pm.
Pete's Plymouth travels 200 miles at a certain speed. If the car had gone 10 mph faster, the trip would have taken 1 hour less. Find Pete's speed.
I am very confused about how to solve this problem! Please explain well. Thank you so much!!! :-)... | 4 | [
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de
Motivation
Everybody knows how to generate a polygonal sphere... but not everybody knows making good polygonal spheres. I mean, spheres that are usable for rendering with a rasterizer using, say, a texture,
or a normal map. Often one resorts to the polar coordinates to construct the sphere and the texture mapp... | 4 | [
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specificity/sensitivity proof
September 19th 2008, 01:28 PM
weakmath
specificity/sensitivity proof
Suppose that items belong to to one of two possible classes, C =0, 1 (0="negative", 1 = "positive"). Suppose that some feature X is known (measured) for each item, but the class membership is
unknown. Suppose t... | 5 | [
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ves
I wasn't thinking when I typed that post. An orthonormal projection always
preserves distances since it is just a generalized reflection/rotation.
Preserving all dot products (including to self) also implies distances are
preserved because |x-y|_2 = x \dot x - 2 x \dot y + y \dot y.
On Sat, Jul 2, 2011 at 10:15 ... | 5 | [
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Homework Help
Posted by Paul on Thursday, September 27, 2007 at 4:35am.
I'm doing statistics homework and am stuck on a problem using integration.
The problem gives a distribution where for x>1, f(x) = k x^-6. I am then asked to "Determine the value of k for which f(x) is a legitimate pdf. "
To be a legitimate pdf, ... | 4 | [
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0.013549804... | 357 | 357 | |
Burden Sharing in Support of the United Nations
IV. Some Estimates of Progressive Formulas
We have made several set of calculations using the following assessment rules:
1. By national shares of world GDP.
2. Proportional to a normalized size of per capita GDP.
2.1 Proportional to an unweighted average of 1 and 2... | 4 | [
-0.041259765625,
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0.0098266... | 358 | 358 | |
Homework Help
Posted by Ivan on Thursday, October 28, 2010 at 6:21am.
Calculate f'(-1)
f(x) = x^7 * h(x)
h(-1) = 5
h'(-1) = 8
Answer is 27, but I got no idea how to get there.
• Calculus 1 - jai, Thursday, October 28, 2010 at 8:08am
first, recall chain rule, since there there is a function of x multiplied ... | 5 | [
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0.0363769... | 359 | 359 | |
Find a basis and the dimension of the following subspaces:
June 23rd 2008, 03:11 PM #1
Find a basis and the dimension of the following subspaces:
1). The space of solutions to the linear system Ax=0, where $A=\begin{pmatrix} 1&2&-1&1 \\ 3&0&2&-1\end{pmatrix}$
2.) The set of all quadratic polynomials $p(x) = ... | 5 | [
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... | 360 | 360 | |
Limit using L'Hôpital
May 24th 2010, 06:24 PM
Ulysses
Limit using L'Hôpital
Hi there. Im new on this forum. And here is the deal, I'm trying to solve this limit:
$\displaystyle\lim_{x \to{0}+}{(\displaystyle\frac{sin(x)}{x})^{\frac{1} {x^2}}}$
I have made an attempt, using logaritm, that I think its th... | 5 | [
0.0283203125,
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-0... | 361 | 361 | |
In the rectangular coordinate system, are the points (a, b)
Author Message
TAGS:
In the rectangular coordinate system, are the points (a, b) [#permalink] 10 Dec 2007, 15:44
... | 4 | [
0.01507568359375,
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Math Help
All! Please, can someone help me with: $\int\frac{x-3}{x^2+1}dx$ The result should be: $\frac{1}{2}ln|x^2+1|-3arctanx+C$ Many thanks!
Write this as $\int\frac{x}{x^2+1}dx-3\int \frac{1}{1+x^2}dx$ For the first integral, substitute $u=1+x^2$. $\int \frac{x}{x^2+1}dx = \frac{1}{2}\int \frac{1}{u}du$ $=\frac{1... | 5 | [
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-0.04052734... | 363 | 363 | |
Domain and range
April 13th 2010, 11:11 PM #1
Newbie
Joined
Feb 2010
Posts
7
Domain and range
Hi,
I am stuck with finding the domain and range of $g(x)=\frac{x}{x-1}$. I think that the domain is all values except $x=1$. But what about the range?
Hi there.
That's true,
It is okay to wri... | 4 | [
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0.06689453125,... | 364 | 364 | |
Homework Help
Posted by Anonymous on Monday, August 19, 2013 at 11:56am.
ABCDEF is a regular hexagon. Square ABXY is constructed on the outside of the hexagon. Let M be the midpoint of DX. What is the measure (in degrees) of ∠CMD?
• geometry - Steve, Monday, August 19, 2013 at 1:59pm
Geometrically, I have no i... | 4 | [
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-0.... | 365 | 365 | |
Uniformly Distributed Random variables
October 5th 2009, 03:52 PM #1
Newbie
Joined
Aug 2009
Posts
15
Uniformly Distributed Random variables
Hey guys, another one of these crazy probability questions...
Let X and Y be independent, each uniformly distributed on {1, 2, ... , n}.
Find P(X + Y = k) ... | 4 | [
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... | 366 | 366 | |
How is the percentage decay of uranium found with the equation below?
October 27th 2012, 05:57 PM #1
Newbie
Joined
Oct 2012
From
Australia
Posts
2
How is the percentage decay of uranium found with the equation below?
How would you go about solving this? (it's question 13 in the image)
The decay o... | 5 | [
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Homework Help
Posted by gabs on Tuesday, June 7, 2011 at 10:56pm.
Find the values of b such that the system has one solution.
x^2 + y^2 = 36
y= x+b
and then they give me an answer box
b=_________ (smaller value)
b=_________ (larger value)
i have absolutely no idea how to even begin this and what they are asking.... | 4 | [
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Help with evaluating indefinite integral as power series?
April 13th 2009, 06:47 PM
virtuoso735
Help with evaluating indefinite integral as power series?
How would I solve this problem using power series?
Integral of [ln(1-t)]/t dt? I know that if I find the power series for [ln(1-t)]/t, then I could integr... | 5 | [
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... | 369 | 369 | |
Gibbs Sampling in R, Haskell, Jags and Stan
Introduction
It’s possible to Gibbs sampling in most languages and since I am doing some work in R and some work in Haskell, I thought I’d present a simple example in both languages: estimating the mean from a
normal distribution with unknown mean and variance. Although one... | 4 | [
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0.0250... | 370 | 370 | |
Algebra (Re.: Reiny)
Posted by Sara on Friday, July 20, 2007 at 5:44pm.
The fact that there was that nice symmetry to the question, makes it easier than it first appears.
I had it as:
(a/b + b/a)÷(b/a - a/b)
look at (a/b + b/a)
the common denominator for this would be ab, so
a/b + b/a = (a^2 + b^2)/ab
similarly ... | 4 | [
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... | 371 | 371 | |
Posts by
Total # Posts: 17,491
college algebra
h = hi + Vi t - (1/2) g t^2 in ancient English units this is h = Hi + Vi t - (1/2) 32 t^2 If Hi = 0 Vi = 128 ft/s then h = 128 t - 16 t^2 for h = 144 144 = 128 t - 16 t^2 16 t^2 - 128 t + 144 = 0 t^2
- 8 t + 9 = 0 t = [ 8 +/- sqrt(64 -36) ]/2 t = 4 +/- sqrt 7 t = 1.35 t ... | 5 | [
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Homework Help
Posted by Sue on Saturday, March 2, 2013 at 2:43pm.
Boxes of bran flakes are known to be normally distributed with a mean weight of 475g and a standard deviation of 10g.Calculate the probability of a box having a weight exceeding 485 grams. Calculate
the probability that the mean weight of sixteen boxes ... | 4 | [
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how to solve this
November 1st 2010, 07:01 AM #1
find the continuous solution of $\frac{dy}{dx}+y=g(x), 0<x<\infty, y(0)=2$ where $g(x)=3, 0<x<\frac{\pi}{2}$
$=\cos x, x\geq\frac{\pi}{2}$
for the first part, i got $-ln(3-y)=x$. but how can i solve it for the second part?
Solving for $y$ in the first ... | 5 | [
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-0.029541015625,
-0.00738525390625... | 374 | 374 | |
regular polygon
June 11th 2011, 08:05 AM #1
Member
Joined
May 2009
Posts
146
regular polygon
Choose some point A inside a regular polygon. The sum of length of line segments connecting A to the vertices of the polygon achieves minimum when A is the center of the polygon.
Can somebody give a proof of ... | 5 | [
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st: get expected error terms in multivariate probit model
Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down on April 23, and its replacement, statalist.org is already up and running.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thr... | 4 | [
0.006988525390625,
-0.051513671875,
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0.0186767578125,
-0.07177734375,
... | 376 | 376 | |
Documentation
Back to top of Surface Evolver documentation. Index.
Gradient Descent Iteration
Basic surface evolution is done by gradient descent iteration. Relevant topics are:
Gradient descent iteration step
Each g command iteration does the following:
• Calculates the force vector at each vertex as the gradi... | 4 | [
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0.04296875,
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... | 377 | 377 | |
Homework Help
Posted by Shay on Wednesday, January 17, 2007 at 6:01pm.
The ractangle given has a perimeter of 14 units. Find the value(s) of x by factoring a quadriatic equation.
x= 12/(x+1)
y= 6/ (4-x)
If anyone can help me that would be awesome, thanks a bunch.
I can only give you an example : for example x2 - x... | 4 | [
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0.0368... | 378 | 378 | |
algebra 2 help
Could any one please explain to me how to solve them thanks =)
I'll help with Q2: $y = \frac{x^2 - 4}{2x^2 + 5x - 12}$. x -int: Apply the definition: Solve $x^2 - 4 = 0$. Vertical asymptote: Apply the definition: Solve $2x^2 + 5x - 12 = 0$. Horizontal asymptote:
Apply the definition and consider the lim... | 4 | [
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-0.... | 379 | 379 | |
Homework Help
Posted by Marisol on Thursday, April 10, 2008 at 8:00pm.
I keep getting an answer with an exponent and i am not sure what i have done wrong here. Any help is appreciated.
To save for his retirement, Jeff puts $800 per month into his savings account every month for 30 years. The savings account pays 9% i... | 4 | [
0.0751953125,
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particular solution for non-homogeneous equation
May 18th 2011, 07:18 PM
break
particular solution for non-homogeneous equation
hello, i just started learning about this and i'm a little bit confused on how to find the particular solution for these 2 non-homogeneous equations.
$S_n = S_{(n-1)}+2n$ and $g_{n... | 4 | [
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0.0211181640625,
-0.06201171875,... | 381 | 381 | |
st: Non-linear regression: interpretation
Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down on April 23, and its replacement, statalist.org is already up and running.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
st: ... | 4 | [
-0.06298828125,
-0.03466796875,
0.01708984375,
0.0751953125,
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0.08544921875,
-0.0341796875,
-0.0... | 382 | 382 | |
Find the area
January 26th 2009, 06:24 PM #1
Newbie
Joined
Jan 2009
Posts
8
Find the area
y=8x2–x3+x
y=x2+11x
Find The Total area enclosed by the graphs of these 2 functions.
Can anyone show me how to solve this without graphing it, we need to make it into an integral and I can't seem to ... | 4 | [
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0.046875,
-0.0157470703125,
0... | 383 | 383 | |
Homework Help
Posted by Britney on Thursday, November 8, 2012 at 7:25pm.
Find the relative extrema, if any, of the function. Use the second derivative test, if applicable.
g(x)=4x^2+7x+6
relative maximum
(x, y) = (, )
relative minimum
(x, y) = (, )
• math - Reiny, Thursday, November 8, 2012 at 8:32pm
your... | 4 | [
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0.03759765625,
... | 384 | 384 | |
A simple DE...for some.
August 31st 2006, 02:52 AM
a4swe
A simple DE...for some.
If $y=e^{ax}cos(bx)$ and $y'''+2y'+3y=0$ what is a and b?
That is the problem to solve and I don't even know what to do.
Can anyone help me out a little and give me a suggestion or two for the solution of this one?
August 3... | 5 | [
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Homework Help
Posted by lauren on Wednesday, January 19, 2011 at 6:40pm.
the question is:
given sec x = 4, tan x < 0, find sin(2x), cos(2x)and tan (2x)
• trig - Reiny, Wednesday, January 19, 2011 at 7:11pm
we can see that secx > 0 and tanx < 0,
so x must be in quadrants IV
draw a right-angled triangl... | 4 | [
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Homework Help
Posted by Mimi on Tuesday, March 20, 2007 at 4:57pm.
How do I know that x^2-7=y is a function? thanks
you know its a function because its a parabola (x^2)
parabolas are functions because there is only one x value per y value.
So I know it is a function because it has (x^2)? Is that the rule? If it has... | 4 | [
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Mathematics 116 > Arakelian > Notes > finalsolutionsF05.pdf | StudyBlue
Math 116 ? Final Exam SOLUTIONS Name: Instructor: Section Number: 1. Do not open this exam until you are told to begin. 2. This exam has 11 pages including this cover. There are 9 questions. 3. Do
not separate the pages of the exam. If any pages do... | 5 | [
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Triangle find angles
November 29th 2006, 09:42 AM #1
Triangle find angles
If $a=7$, $b=4$, $c=9$; Find the angles A, B and C. Give your answer in degrees to at least 3 decimal places.
A=?
B=?
C=?
Last edited by qbkr21; November 29th 2006 at 10:05 AM. Reason: I got the Answer Myself....
Hell... | 4 | [
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Posts by
Total # Posts: 494
math(is this how you work this)
15-4x = 2(3x+1) 15-4x = 6x + 2 Combine all the 'x' terms on one side and the constant terms on the other side. 15 - 2 = 6x + 4x 13 = 10x So, x=?
math (did i do this right)
1. You substituted OK, but... 2(-1+3) =2(2) =? 2. Again, the substitution is OK, but.... | 5 | [
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Hermite-Hadamard inequality for functions whose derivatives absolute values are preinvex
Abstract
In this article, we extend some estimates of the right-hand side of a Hermite-Hadamard-type inequality for preinvex functions. Then, a generalization to functions of several variables on invex
subsets of
Keywords:
Hermi... | 5 | [
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-0.0737... | 391 | 391 | |
Homework Help
Posted by LALA on Saturday, February 27, 2010 at 3:03pm.
How do i find the derivative of
f(t)= 20- 30/rooot 9 + t^2
heres how i did it
f'(x)= 20' - 30/root(9+t^2) '
= 0 - 30/root(9+t^2) '
(Quotient rule)
f'(x)= 30' (root(9+t^2) - 30(root(9+t^2) '
f'(x)= -30(0.5(9+t^2)^-0.5) (2t)
the answer at the... | 4 | [
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... | 392 | 392 | |
Math Help
December 9th 2007, 06:49 PM #1
Newbie
Joined
Dec 2007
Posts
2
Loans
if anyone can give me a hand I am doing a test review and am stuck on this question.. thanks in advance so much
Question:
A $6500 dollar loan at 11.25% compounded monthly is to be repaid by three equal payments due t... | 4 | [
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Posts by
Total # Posts: 195
Education/Subbing
How many sub teachers can really say that they are happy working as a sub teacher? Look deep inside and honestly answer the question: Are You Happy Subbing?
Education
I was wondering how sub teachers survive during the long summer months when there is no pay, especially ... | 4 | [
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0.06... | 394 | 394 | |
Trigonometry
February 5th 2006, 01:45 AM #1
Trigonometry
I don't understand this question, and need some help greatly. Thanks!
From the top of a cliff 160m high two buoys are observed. Their bearings are 337° and 308°. Their respective angles of depression are 3° and 5°. Calculate the distance between the bo... | 4 | [
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Pre Calc-decode matrix
Posted by Stephanie on Sunday, April 27, 2008 at 6:53pm.
help!-matrix size is 3x3
clues for the encoding matrix:
1. all entries are one digit and positive
2. a11, a12, a13 are all equal and prime, their sum is also prime
3.the sum of a11, a12, a13 is equal to a21
4. the sum of a22 and the o... | 4 | [
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Stata
How can I calculate the Fourier coefficients of a discretely sampled function in Stata?
Title Discrete fast Fourier transform
Author May Boggess, StataCorp
Date October 2005
For many of us, the last time we saw a Fourier series was in math class, where the goal was to decompose a function on [0,2π] into i... | 5 | [
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Homework Help
Posted by sam on Saturday, April 21, 2012 at 6:02pm.
A random sample of n=500 households in a certain metropolitan area revealed that 150 have combined cable, phone and internet service.
a.Calculate p-hat, the sample proportion of households having such service.
b.Calculate a confidence interval for π,... | 4 | [
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Homework Help
Posted by Lisa on Tuesday, August 2, 2011 at 8:10pm.
One pump can empty a pool in 5 days, whereas a second pump can empty the pool in 7 days. How long will it take the two pumps, working together, to empty the pool?
• math - Damon, Tuesday, August 2, 2011 at 8:25pm
Pump 1 does (1/5) pool/day
... | 4 | [
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