Monday

September 1, 2014

September 1, 2014

Number of results: 13,508

**repost Calculus**

the length of the curve of intersection of the cylinder (4x^2) + y^2 = 4 and the plane x + y + z = 2 I'm so lost. Any help is appreciated!
*April 24, 2009 by Anonymous*

**Pre Calculus Repost Please Help**

Can someone help me solve this problem: cos^2x + 5cosx - 2= 0 I am having some trouble finding x
*February 5, 2009 by Anonymous*

**Bobpursley can you help me with my problems below?**

I had problems from yesterday but I still don't get them can you help?do you want me to repost? repost: I cant find them.
*March 4, 2007 by Margie*

**Calculus - repost**

Find the derivative of F(x)= integral from -2 to x of sqrt(t^3+8)dt? My answer: sqrt(x^3+8)? Is this right?
*September 6, 2008 by Amanda*

**Science [repost]**

What is the difference between an ionic bond and a covalent bond? I just keep forgetting which one is which...any easy way to remember these? PS> I know that you're not supposed to repost until 24 hours but I really need this answer! Thanks -MC
*February 5, 2009 by mysterychicken*

**Calculus (repost)**

Find the limit: lim {[1/(2+x)]-(1/2)}/x as x->0 How do you remove the complex fraction??? (or just complex fractions in general, I have trouble with them...) Thank you!
*February 15, 2010 by Momo*

**english**

Homework Help Forum: brain teaser help Current Questions | Post a New Question Answer this Question | Further Reading Posted by sam on Sunday, April 2, 2006 at 3:34pm. try to find the error. I couldn't; it's very hard. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z did ...
*September 10, 2006 by chris*

**Repost- Already Solved-Calculus**

is the inverse function of x+ floor(x) equal to x - floor (x/2) i got this after plotting points but i'm not sure. thank you Thank you 'gain!
*March 31, 2013 by Matt*

**Calculus (repost)**

Use implicit differentiation to find dy/dx if cos xy = 2x^2 - 3y. I'm stuck on this problem because I'm getting thrown off on how to factor this. Here's my work so far: -{[(dy/dx)y + y]sin xy} = 4x - 3(dy/dx) -{[(dy/dx)y + y]sinxy} + 3(dy/dx) = 4x ...now what? Thx
*May 31, 2010 by Katy*

**CALCULUS (REPOST)**

If dy/dx = x (cos x^2) and y = −3 when x = 0, when x = pi, y = . A. −3.215 B. sqrt(2) C. 1.647 D. 6 E. 3pi For some odd reason, I keep getting -0.5325989. I can't come up with any of the answers given.
*May 29, 2012 by Anonymous*

**Calculus - Urgent!!!**

In case this looks familiar, yes, it is a repost. I really need help. Find the anti-derivitive of f(x)= x^3(x-2)^2. Multiple choice gives me the options: A: 1/6 x^6 - 4/5 X^5 + x^4 + C B: 1/6 x^6 - 4/5 X^5 + 1/4 x^4 + C C: x^6 - X^5 + x^4 + C D: x^5 - 4x^4 + 4x^3 + C I got as ...
*April 26, 2012 by In Need Of Help!*

**history**

on the 1st page can someone please help me??????? Its the 2nd and 3rd black dot next to my nasme. Even if this is a repost, more information needs to be given before we can adequately respond. Please repost with more information. Thanks for asking.
*April 29, 2007 by Mack*

**algerba!2!**

(-2x2y)3 * (5xy3)2 *I don't get this on at all!!! Are there any exponents in this one? If so, repost showing the caret to indicate the exponent. oh sorry I forget to do that.LOL!Here it is now: (-2x^2y)^3 * (5xy^3)^2 Are there any exponents in this one? If so, repost showing ...
*November 8, 2006 by Sandro!*

**Calculus (repost)**

This problem uses a TI-89 calculator) Find the largest and smallest values of the following function on their given intervals: y=(cos x)^x [-1.5, 4.75] This is what I put in the calculator (home screen): fMin((cos(x))^x,x I -1.5 < x < 4.75 (I = "with" symbol, < is ...
*June 8, 2009 by Anonymous*

**To Lynn,Alex,Physics_student,Natasha**

Please refrain from reposting the same question within a short time (less than a day). If you do repost, add "repost" at the end of the subject. Quadruple posting within an hour and a half means that teachers have to spend time reading the extra posts, which actually slows ...
*October 6, 2009 by MathMate*

**calculus repost, please assist pleassssssse**

Hi Trying to work with confusing Taylor series....any assistance would be much appreciated!! How can I use T(x)=5-9((x-2)^2)-3((x-2)^3) to approximate the f(0) ???? I realize that Taylor series f(x)=f(a)+f'(a)(x-a)+f''(a)((x-a)^2)etc... but the above T(x) is centered at x=2, ...
*March 15, 2011 by kiksy*

**chem -repost for bobpursley**

i don't know how to solve this. looked through all my notes but i'm not sure what kind of formula i am to use or if i even need one! please help me to understand the theory behind this: "calculate the work need to make room for the products in the combustion of S8(s) to SO2(g...
*April 17, 2011 by please, help me *

**Science [improv/repost]**

What is the difference between an ionic bond and a covalent bond? I just keep forgetting which one is which...any easy way to remember these? PS> I know that you're not supposed to repost until 24 hours but I really need this answer! Would this answer work?: In an ionic ...
*February 5, 2009 by mysterychicken*

**physics, error calculation repost**

I need to derive an error equation for Bohr's model to use in my physics lab this week. I am really bad at calculus, so if anyone can help me that would be really great. the equation is (1/lambda)=R[(1/n^2final)-(1/n^2initial)] I've never had to derive anything like this ...
*March 8, 2011 by Trace*

**Pre-Algebra [repost]**

I'm sorry I had to repost, but this is urgent and i need it done by today!! Can someone please show me how to do these problems? I've been trying but I'm having a hard time... 1.Simplify the expressions on each side of the equation to obtain an equivalent equation: 5x + 12 + ...
*May 2, 2009 by mysterychicken*

**Repost Repost Bio**

I asked this, and didn't get a very helpful response. Question: hi, i did this lab, from this website and I was wondering if anyone could come up with 3 sources of error, and they can't be human error. Thanks! You are saving me! Seeing as I am not allowed to post to the ...
*February 26, 2008 by InSANELY URGENT(Science teacher help)*

**Repost- Calculus; someone please help**

Please help out. Thank you. A right triangle has one leg on the x-axis. The vertex at the right end of that leg is at the point (3,0). The other vertex touches the graph os y=e^x. the entire triangle is to lie in the first quadrant. Find the maximum area of this triangle....
*February 9, 2011 by Amanda E.*

**Just a repost, in case the old isnt seen**

sorry! I never noticed..the mass should be 52000kg sorry about that! For Further Reading physics repost - Alexis, Sunday, October 14, 2007 at 6:07pm so it should be a 52000kg train slows from 25 m/s to 14m/s in 5.0 s. Calculate the work done on the train. so I found the ...
*October 14, 2007 by Alexis*

**My algebra repost**

1)
*April 18, 2007 by Antonio*

**math (repost)**

y =x+2 y =x^2
*April 8, 2008 by michael*

**Calculus**

Posted by CMM on Wednesday, October 13, 2010 at 12:50am. Calculate the following: a) Find g(f(1)) b) Find lim x-> 1+ g(f(x)) c) Find f(g(0)) d) Find lim x->0- f(g(x)) f(x)= 1-x, x<1 1, x=1 x-1, x>1 g(x)= -x, x<0 2, x=0 x+2, x>0 This is where it gets hard. I ...
*October 13, 2010 by CMM*

**Pre-Calculus/Calculus**

I am too embarassed to ask this Calculus (really pre-calculus) question in tutoring, because I know I should know. Is the inverse of f(x)=3x-1 actually f(x)=1/3x+1? How do I find it? What if it asks the same equation replaced with f to the -1 power (x)? I think I know how the ...
*July 1, 2008 by Molly*

**About Posting**

sorry for repost ~C
*August 16, 2007 by ~christina~*

**math (repost)**

if f(x)=2x-1 and g(x) 1/2 (x+2) calculate a)f(3) now if 2(3)-1=5 how do i find for gf(3)????
*April 14, 2008 by cassie*

**algebra repost**

simplify radical sqrt a^10
*July 24, 2009 by Melissa*

**To Danii**

I cannot read your 11:55 post. Can you repost it here?
*May 20, 2010 by Jen*

**english**

sorry i havent really used this site and im not sure how to repost my question instead of putting it as an answer to my question so heres the repost: I had to find embedded clauses I deplore the fact that bats have wings. --> bats have wings That Guinevere loves Lorian is ...
*July 7, 2008 by Anonymous*

**Abby**

Please repost your question, I accidently deleted it.
*April 9, 2008 by bobpursley*

**6TH GRADE MATH**

Repost perimeter is 30 and area 36
*November 29, 2010 by William*

**algebra 117**

repost sorry about that (k^1/8)^-4 oer(k^7)^1/2
*July 22, 2012 by BERNIE*

**Calculus**

What is the use of Calculus? How is it use in jobs? What jobs use Calculus? Calculus is used in engineering, economics, any physical science, and in business (e.g., actuary studies and statistics).
*May 5, 2007 by Anonymous*

**History opinion repost for Kate**

Is the Bayeux Tapestry an accurate source? Why or Why not?
*April 28, 2009 by Ms. Sue*

**Math (repost)**

Given f(x) and g(x)=f^-1(x). If f(1)=4 and f'(1)=-3, then find g'(4). ...No idea where to start with this. Please help? Thanks much!
*April 27, 2010 by Nikki*

**Algebra(repost of one question)**

Bobpursley: 89. Solve for x in the equation: (6/7)x - 6 = -2 I got x=28/3
*May 1, 2010 by y912f*

**Algebra (repost)**

Can you help me on this problem as well? (or anyone.) Solve each inequality and check your solution. h - > -7 4 (bumping)
*May 10, 2010 by Dean*

**Repost 2 PLz Help**

6-y/y^2-2y-24=? *I don't get it at all!!! You need parentheses around portions of this thing so we know what the problem is.
*February 20, 2007 by steve the hippo*

**Algebra**

|a+2 3z+1 5m|+|3a 2z 5m|=|10 -14 80| |4k 0 3 | |2k 5 6| |10 5 9| I needed to repost this. This is a matrice and I am trying to find the values of the variables in each equation.
*December 17, 2009 by mike*

**ethnics help**

sorry to interrupt is someone available for help. Please repost with your question, and we will do our best to help. Thanks for asking.
*November 2, 2006 by minemine*

**Science repost for help**

Sciece (chemistry) - help, Tuesday, September 25, 2007 at 4:32pm what is the particle theory
*September 25, 2007 by Ms. Sue*

**REPOST biochem**

i don't understand this why can carboxyl and phosphate groups act as acids? as in, what makes an acid?
*October 18, 2007 by J*

**calculus-repost-thanks**

Is this correct? determine if abslutely convergent and convergent 1. the series from n=0 to infinity of ((-1)^n)/n! I said it was abs. conv, and therefore conv 2. the series from n=0 to infinity of (-1)^n/(the square root of (n^2+n+1)) I said ratio test was inconclusive so not...
*March 17, 2008 by john*

**egg protection**

how can i protect an from a 6m fall and make it go 3m please look at your question. It makes no sense to us. Repost it
*March 5, 2007 by chris*

**repost**

bobpursely, I posted at 709 from our previous dialogue, can you please help me again? Much appreciated!
*September 30, 2007 by RSVP*

**Science - Repost for ?????**

which moon is the brightest from the surface of jupiter? this question is driving me BLOODY crazy 4 my homework!
*June 24, 2008 by Writeacher*

**physics repost**

Calculate the force of gravatational attraction between two spheres of mass 10.1 kg and 45.4 kg that are 38.5 m apart. F = G(m1)(m2)/r^2 = 6.67 x 10^-11(10.1)(45.4)/38.5^2 = 2.06 x 10 ^-11 N
*April 3, 2008 by Jon*

**To Happy --**

Please repost your math question -- and remove Ms. Sue's and my screen names from YOUR NAME'S space. Thanks. =)
*February 8, 2009 by Writeacher*

**Grammar [Repost]**

Is this an adverb phrase? The tangy scent of barbeque drew us TOWARD THE LITTLE CAFE. Thanks -MC
*May 12, 2009 by mysterychicken*

**algebra repost**

Simplify each expression. Assume all variables represent nonzero real numbers. -40^0- 30^0
*July 24, 2009 by Melissa*

**math**

2Tons=____oz Try the method DrWLS or I showed you. Then repost if you don't understand but tell us what you are having trouble with.
*November 30, 2006 by brooke*

**English**

Bloom's taxonomy, anyone? (Yeah, it's a repost.) Anything found on the wiki or the first page of google I've tried.
*September 11, 2007 by Samantha*

**chemistry [repost]**

In a recrystallization of vanillin, can you purify a substance whose solubility decreases as the temperature increases? Any help is appreciated!
*June 23, 2008 by Anonymous*

**physics repost**

A 1.00-kg ball is attached to a string of 0.50 m and swung in a horizontal circle with a velocity of 2.00 m/s. Find the centripetal acceleration. ac=v^2/r = 2.00^2/.50 = 8.0 m/s^2
*April 3, 2008 by Jon*

**To "Cutie..."**

Please choose a better "First Name" -- make sure it's not offensive in the least! Then repost your question. Thanks. =)
*July 7, 2008 by Writeacher*

**MzLynn - auditory learning**

Your post has been removed. We'll be glad to help you if you repost it along with your attempts to answer the questions.
*January 17, 2009 by Ms. Sue*

**Physical Science**

if you tear a piece of material in haft, how is the density affected? sorry i repost it, just the title
*October 11, 2012 by Laruen*

**Algebra**

In an interview of 50 math majors, 12 liked calculus and geometry 18 liked calculus but not algebra 4 liked calculus, algebra and geometry 25 liked calculus 15 liked geometry 10 liked algebra but neither calculus nor geometry 2 liked geometry and algebra but not calculus. Of ...
*January 11, 2010 by Anita*

**To Ray -- college**

I've removed your biotechnology post. Please repost it with your thoughts about completing it and specifically how you would like us to help you.
*February 17, 2009 by Ms. Sue*

**math repost**

name two numbers with decimal hundredth that round to the same whole number but different tenths.
*October 12, 2012 by marco*

**French for Anonymous/E.G.**

If you go back before the "repost" I found the first post just now! There is an answer there. Sra (aka Mme)
*November 18, 2008 by SraJMcGin*

**To Sha -- Child Development**

I've removed your lengthy post asking you to comment on a complex scenario. Please repost with your analysis of this situation. We'll be glad to help you then.
*February 27, 2009 by Ms. Sue*

**Math(repost of #2 of last ?)**

Write XY(with line over it) as the sum of unit vectors for X(8,2,-9) and Y(-12,-1,10). There's an example just like this in my book but I really don't understand it.
*April 25, 2009 by Jon*

**science-repost! please help**

Determine if the following substances are soluble (at room temperature, 1 atm) in water or in hexane (: grease and CS2 how do you know this
*January 17, 2013 by Samantha*

**Chemistry **

Repost:: sorry couldn't understand it What is the concentration of C2O4^-2 in a 0.370M oxalic acid solution? Ka1=5.6x10^-2 and Ka2=5.1x10^-5
*March 20, 2013 by V*

**Calculus**

What is the simplest solution to the Brachistochrone problem and the Tautochrone problem involving calculus? (I know that the cycloid is the solution but I need a simple calculus proof as to why this is the case)
*May 27, 2010 by Sam*

**Repost: Biology!**

What would be the consequences of the following be on photosynthesis? These are the only ones I am stuck on! a.) Photosystem I is not functional b.) NADP+ is not present in the thylakoid space
*March 23, 2008 by HELP! PLEASE SOMEONE ANSWER!*

**physics repost**

Which of the following physical properties can be used to measure temperature using a thermometer? A)volume B)pressure C)density D)viscosity I got A
*April 4, 2008 by Jon*

**True or False econ repost**

Relative PPP is a better approximation of reality when one of the two countries is suffering hyperinflation and the other is not.
*May 29, 2008 by wilde*

**Pre-Algebra [repost for Reiny]**

In my last post for #1, I asked my teacher and she said that it's actually k=30 . Could you have gone wrong somewhere? That's the only one. -MC
*May 1, 2009 by mysterychicken*

**math**

8. In an interview of 50 math majors, 12 liked calculus and geometry 18 liked calculus but not algebra 4 liked calculus, algebra, and geometry 25 liked calculus 15 liked geometry 10 liked algebra but neither calculus nor geometry 2 liked geometry and algebra but not calculus. ...
*November 30, 2009 by poo*

**Science**

I dont noe ne thng about fluids. HELp..my test is in two days If you repost your question and spell the words right, I'll help you. lol pwnT
*January 30, 2007 by Sana*

**government**

describe a hypothetical situation in which collective naturalization might be applied? We do not do your homework for you. However, if you will repost your answer, we will be happy to proofread and give suggestions.
*May 7, 2007 by angie*

**To: Troyer0269 - Sci245**

I've removed both of your science posts. Please repost when you can tell us what you've done so far to fulfill these complex assignments and where you specifically need our help.
*February 8, 2009 by Ms. Sue*

**To: Computer -- Cultural Diversity**

I've removed your post with the complex assigment about subordinate groups. Please repost it and tell us what you've already done on this assignment and how we can help you complete it.
*February 11, 2009 by Ms. Sue*

**Repost PLease Help!**

d+7/d^2+49= / (d+7) (d+7)*I got the bottom but I don't know what to put at the top...please help!!! answered below
*February 20, 2007 by steve the hippo*

**physics repost**

Calculate the sound level in decibels of a sound wave that has an intensity of 2.25 µW/m2. F
*April 19, 2008 by chris adison*

**To JMartina**

Please do not post your e-mail address here. Repost your question, please.
*June 19, 2012 by Ms. Sue*

**Repost physics**

PLEASE SOMEONE HELP ME!! I POSTED DOWN AT AROUND 10 something!! PLEASE!!! I NEED HELP!!!
*September 30, 2007 by Cooper-Nichol*

**physics repost**

sorry! I never noticed..the mass should be 52000kg sorry about that!
*October 14, 2007 by Alexis*

**S.S. Repost for Brittani**

S.S. - Brittani, Friday, October 26, 2007 at 5:47pm Where are charges for the impeachment made?
*October 26, 2007 by Ms. Sue*

**MATH Introduction to Math Skills and Strategies**

Evaluate when x+y/3 when x=17 and y=4 sorry had to repost the question thank you
*November 15, 2009 by nikki C*

**Physical Science**

According to the well known equation, energy equals mass times the speed of light squared..... ? You question is unclear. Please repost with more specifics.
*March 29, 2007 by Gina*

**Repost repost physics**

Posted by Meredith Mcneeds Help! on Monday, November 19, 2007 at 8:08pm. Hey, ok so I am supposed to be helping my cousin this with this physics problem, and this is the only one that has ever stumped me! Neutral metal spheres A and B each of mass 0.2 kg hang from insulating ...
*November 19, 2007 by Meredith Mcneeds Help!*

**english**

rearrange thes letters into one word Imbillie, you did not give us the letters... please repost.
*January 9, 2007 by imbillie*

**Math repost for Spenser**

History - Spenser, Wednesday, October 10, 2007 at 1:33pm Find the center and radius of x^2 + y^2 - x + 2y - 3 = 0
*October 10, 2007 by Ms. Sue*

**Math repost for Samantha**

Maths - samantha, Wednesday, October 10, 2007 at 3:24pm how do you graph linear equations?
*October 10, 2007 by Ms. Sue*

**physics repost**

A force of 200 N acts on a 7.20-kg bowling ball for 0.350 s. Calculate its change in velocity. 7.20/0.350 = 20.57 m/s
*April 3, 2008 by Jon*

**physics repost**

Venus has radius 6.05 x 10^6 m and mass 4.87 x 10^24 kg. Calculate the value of acceleration due to gravity on Venus's surface. don't know this one
*April 3, 2008 by Jon*

**Chemistry**

Can you please look at my repost. I made an error in my question, so now I need your help for a different part of the question. :) Thanks. -Sadie
*February 14, 2009 by Sadie for drwls*

**business-repost**

How does inflation affect monetary assets? real assets??? Can anyone please give me some ideas????THANKS A LOT!!!!!
*April 1, 2009 by Ally*

**Science**

What is the boiling point of ethanol when the atmospheric pressure is 60kPa? I decided to repost this ? under Science instead of Chemistry. Thanks.
*April 14, 2012 by Gerald*

**math**

3 3/4pt=____c show steps and work please Try the method DrWLS or I showed you FIRST. Repost if you still don't get it but tell us what you don't understand about the procedure.
*November 30, 2006 by brooke*

**Dogs**

Thank you for using the Jiskha Homework Help Forum but posting so close together is considered "flooding." Only repost if you don't receive an answer in several hours. The volunteers here are not on 24/7.
*May 8, 2007 by SraJMcGin*

**CHEMISTRY REPOST**

Calculate the concentration, in percent by mass, of a refrigerant brine solution which is 4.03 M in NaCl with a density of 1.116 g mL-1. detailed answer, please, i dont understand how to do this at all!!!
*November 10, 2007 by keely*

**Math (Algebra) Repost from July 27, 2010 at 4:13pm**

Could someone help to explain to me how factoring is used to solve quadratic equations? Also could you give me some example to try? Thank You.
*July 28, 2010 by Lynn*

**To Katey**

This is not a "let's gather opinions" website. If you have a real homework question (and don't expect others to do your thinking for you), please repost correctly, including the correct school subject.
*March 23, 2011 by Writeacher*

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