Tuesday

March 3, 2015

March 3, 2015

Number of results: 7,684

**algebra**

Solve for s in this equation. Depreciation. D=C-s/n This is my answer D-C=C-s/n-c D-C=-s/n -n(D-C)=-s/n*(-n) -nD+nC=s s=n(C-D) Please chack to see if this is correct Looks fine to me. A slightly shorter (by 2 lines) rearragement is: D=C-s/n D+s/n=C s/n=C-D s=n(C-D) but hey, ...
*April 4, 2007 by jessica*

**math**

i got the following wrong, but don't know what I did wrong- die rolled 30 times, what is the expected value that a 5 will appear. I thought 3.5, but was told wrong. Help!
*September 5, 2009 by constance*

**english**

What is wrong with these sentences then? I have been reading and studying abouy subject-verb agreements and I keep getting this wrong so I need help becauase I just got these wrong. 1. A number of my friends have bought new cars recently. 2.Each of his sisters go to a ...
*July 24, 2009 by betty*

**Calculus**

Let f be defined as follows. y = f(x) = x^2 - 4 x (a) Find the average rate of change of y with respect to x in the following intervals. from x = 5 to x = 5.5 For some reason I keep getting this wrong. The way I did it was: f((5.5)-f(5))/(x2-x1)= 22-5/5.5-5=34 This is wrong, ...
*February 4, 2011 by Anonymous*

**Maths**

There was a question: A gallon jug of milk is 3/4 full. After breakfast, you drink 1/12 of the milk. What fraction is the gallon is left? And here was my answer: 1/12 drank --> 11/12 left 3/4*11/12=11/16 But I got the question wrong. Did I get it wrong? I got it correct, ...
*October 28, 2013 by Nana*

**URGENT Spanish help please.**

ok in the example it shows: ¿Comprendes espanol? Si, lo comprende ok for this question it's asking 1) do you and your siblings practice tennis my response: no, no los practicamos.. it said i was wrong how would I correct that 2) it asked does your mother teach biology? My ...
*April 1, 2012 by help*

**English**

They worked in the garden, but they worked wrong? What did they dod wrong? (Is the sentences grammatical? Do we have to use 'wrongly' instead of 'wrong'?)
*November 7, 2012 by rfvv*

**Antiderivatives**

For the function f, given below, find the antiderivative F that satisfies F(1)=1. f(x)= x^5 -4x^-3 -4 . I keep getting x^6/6 +x^2 -4x + 17/6 . But my answer is wrong My other answer of x^6/6 +4x^-2 +4x + 43/6 is wrong also. They both end up equaling 1. So what am I doing wrong?
*January 22, 2015 by Anonymous*

**Math**

John's car is 13 feet long. He is making a model that is 1/12 of the actual size. Which proportion below should be used to find the length, L, of the model? A(wrong) 13/L = 1/12 B(correct) L/13 = 1/12 C(wrong) L/13 = 1/L D(wrong) 12/L = 13/1 I don't get it! How is it B?
*February 28, 2010 by Sarah*

**chemistry class**

What is the pH of an aqueous solution at 25.0 °C that contains 3.98 × 10-9 M hydroxide ion? i posted this before and i tried solving it but i get it wrong 14 = ph + - log (3.98 × 10-9) 14- 8.4 = ph 5.6 = ph but the correct answer is 8.400 what did i do wrong? or is the answer ...
*November 22, 2010 by jessie*

**PLease Help Me IN Math**

Problem: 25-x^2 6 ------ * --- 12 5-x What I Got: 5-x --- 2 *Please Check My Work And Tell Me If I am Correct or wrong.If I am wrong please help me as much as possible.Thank you~ Wrong. When are you going to factor the 25-x^2 ? The 5-x then will divide out. oh...so then will ...
*February 26, 2007 by Margie*

**math11**

Solve the non linear equation x^2=3x+4 graphically using a calculator, Write the equations of the graphs you used to find the solution. I got this question wrong what would be my Y1= and Y2= equations. Not sure what I'm doing wrong but whenever I have an x^2 I get them wrong.
*October 19, 2010 by Juliet*

**math11**

Solve the non linear equation x^2=3x+4 graphically using a calculator, Write the equations of the graphs you used to find the solution. I got this question wrong what would be my Y1= and Y2= equations. Not sure what I'm doing wrong but whenever I have an x^2 I get them wrong.
*October 19, 2010 by Juliet*

**Chemistry**

NEWW- 0.10 M methylamine (CH3NH2) kb= 4.38e-4 calc the percent ionization so i did the ICE table to find that x=6.62e-3 (that was a typo the first time) and then i divided by .1 and then multiplied by 100. but i got the wrong answer whats did i do wrong? my answer was 6.62% ...
*February 15, 2009 by Spencer*

**psychology**

sociocultural theory interplay of genetic inheritance and environment(right) impact of being African American on your learning abilities (wrong) role of the unconscious in learning(wrong) role of consciousness in child development(wrong)
*December 14, 2008 by ourania*

**6th grade Math**

I got a problem wrong and I don't know why. Here it is: A highway construction warning sign blinks on and off. In all, the sign is on for 0.88 of each minute. For how many seconds is the sign on in 5 minutes? I multiplied 0.88 x 5 and got 4.40 but it was marked wrong. What did...
*September 27, 2012 by Nicole*

**Math**

Find the area of a circle whose circumference measures 100 cm. Area (to the nearest square centimeter) = cm2 I plugged in everything C = 2 r C=2x3.14x100= 628 <<< The computer said it was WRONG ! Then, I tried C= 2X3.14X50= 314 !!! If I am wrong can you EXPLAIN to me ...
*June 28, 2013 by sarah*

**Advanced Accounting**

Mr. Right and Mr. Wrong own an antique store in a partnership. They share profits and losses equally and receive an annual salary of $50,000, as per the partnership agreement. Mr. Right travels the country buying antiques. Mr. Wrong manages the store. From time to time, they ...
*December 3, 2012 by Angie*

**Algebra: Help Please**

For the given function, compute the missing values in the following table. f(x) = 8x i got the negatives wrong, but I know how to solve for it. Is there a reason it is wrong? -3: -1/512 -2: -1/64 -1: -1/8 (^These were wrong, but I don't know how to solve it) 0: 1 1: 8 2: 64 3...
*February 23, 2012 by Ann*

**chemistry**

Formal charge: kind of confused? why cant i get -1? i just want to know if the way im solving it, if its completely wrong. i have a test soon. please help! tinypic . com /view.php?pic=14buuti&s=7 ok in class we did this. and for O FC= 6-4-3=+1 but S FC = -1 (I get 6-4-1= +1) ...
*February 13, 2011 by jessie*

**MATH 2B Calculus **

Consider the area between the graphs x+4y=14 and x+7=y^2. This area can be computed in two different ways using integrals. First of all it can be computed as a sum of two integrals They ask to use two integrals so i put f(x) from -7 to 2 which is correct but for g(x) i put 2 ...
*August 20, 2010 by TOMO*

**math**

I am doing something wrong when I work this question. Can someone show me the steps. I have the answer. x<5.189 The sum of the costs in parts a and c is less than $120. Write and solve an inequality to determine the possiblities for the number of compact disks Merle ...
*April 14, 2007 by priscilla*

**Calculus-help please**

f(x)=(9x^2–8)^6(4x^2–5)^11 What's f'(x)= i found (9x^2-8)^6 *11(4x^2-3)^10*8x+((4x^2-3)^11)6(9x^2-8)^5*(18x) but my electronic homework says it wrong what did i do wrong?
*April 30, 2008 by John*

**Factor Completely**

c^2 - 4c - 32 I got (c - 4) (c - 8) but i think its wrong because the do not match to make it squared, what am I doing wrong?
*January 25, 2009 by Jennifer*

**2nd grade**

what is the wrong verb in this sentence? One person done something wrong?
*February 17, 2010 by ronald*

**Derivative**

Find dy/dx for the following: 1) x^3 + 3x^2*y + y^3 = 4 I get -3(x+2y)/x^2 + y^2 it's wrong though. 2) x + y^2= xy^2 I get y^2 + 1/ 2y- 2xy this is also wrong. can you explain thanks
*March 20, 2013 by Maryanne*

**English**

1. Is there something wrong with her? 2. Is there anything wrong with her? (Are both grammatical? What is the difference between them?)
*December 3, 2013 by rfvv*

**Algebra**

2r-5s=-14 5r+2s=23 I know the answer is s=14 and r=3 but how do I wirte this down on my assignment? If I entr it wrong, I will get it wrong.
*April 11, 2009 by Shannon*

**French**

What's wrong with this sentence? Un "A" est meilleure q'un "F". I think there's something wrong with q'un
*May 27, 2009 by Angie*

**Chemistry**

What is wrong with these sets? Fix what's wrong: n=4, l=3, ml=4 n=2,l=-1, ml=1 I don't exactly even know what the question is asking!
*November 30, 2011 by Maggie*

**algebra 1**

-2/3z=-4/9 i tried to solve, but i keep on getting the wrong answer, and i do not understand what i am doing wrong. please help.
*October 4, 2009 by zoey*

**Math**

I had to simplify the expression: -5exponent2(squared) I got the answer of 25 wrong. Why is that wrong?
*January 17, 2011 by Julie*

**Chemistry**

Calculate the pH after 0.10 mol of HCl is added to 1.00 L of the solution that is 0.57 M HF and 1.13 M KF. I got 3.01, but it is wrong. What did I do wrong?
*March 27, 2011 by Mary*

**Chemistry**

At 1100 K, Kp=0.25 for the following reaction. 2SO2(g) + O2(g) (reversible arrows) 2SO3(g) What is the value of K at this temperature? This is what I have so far: I did Kc=0.25(1100(0.0821))^-1 and got Kc=0.00276. That is incorrect. Why? What did I do wrong? I believe I gave ...
*July 31, 2007 by Taasha*

**6th grade math**

use compatible numbers to estimate the quotient: 7.35/6 answer: 1.20 is this wrong if so what did i do wrong? Thanks
*November 8, 2010 by Meg*

**Algebra**

What is the best estimate for 3 + (-14.9)(-2.3)? a 36 b 31 c 48 d 33 I came up with 36 but my teacher counted it wrong. I reworked it but still come up with A-36. What am I doing wrong?
*November 5, 2013 by Daniel*

**Math**

The problem is ; 10x+8-y X= 2 Y=5 Every time I do it I get 23 but my teacher says I'm wrong . where am I wrong ? someone help me please .
*August 25, 2014 by Belle*

**Math Question**

( (0.1095 mmol/mL)(25 mL) - (0.1482 mmol/mL)(29.04 mL) ) / ( (1000 mg/g)(1.3010 g) ) what is the answer i got -.0012 but its wrong Something is wrong with what you are trying to calculate. The first term has dimensions of millimoles and the second term has dimensions of ...
*February 21, 2007 by chris*

**algebra**

systems of linear equations in 3 variables 1/3x-2/3y+z=0 1/2x-3/4y+z=1/4 -2x-y+z=1 every time i do it is wrong and i cannot figure out what I'm doing wrong please help!!!
*April 2, 2012 by ashley*

**Algebra**

Need help finding composition of functions. I am doing something wrong continue to get wrong answer f(x)=x+6/x+5, g(x) = 2x-7. Find (fog)(x)
*March 25, 2013 by Jackie*

**Physics ~work shown pls help!**

An electron is accelerated by a 6.4 kV potential difference. The charge on an electron is 1.60218 × 10^−19 C and its mass is 9.10939 × 10^−31 kg. How strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.1 cm? Answer in ...
*April 15, 2011 by cr*

**Math**

Hi, I am getting very frustrated. I am doing an online homework for chemistry and it's telling me to round to the nearest WHOLE number. So the answer I got was -1435.650.... And I typed in -1436. and said I was wrong and so I tried it again and typed 1.4 x 10^3, wrong again. ...
*August 4, 2010 by Anonymous*

**Algebra**

In response to my previous question, I tried 115 tan 78.3. But I got -28.1. Is my calculator on the wrong setting or did I type it in wrong?
*December 6, 2009 by Victoria*

**Algebra**

Simplify the rational expression. (45y-9xy)/(x^2y-25y) I got an answer of 9y/y(x+5) but it seems to be wrong Could anyone see what I did wrong. Thank you
*September 21, 2010 by Anonymous*

**chem**

Calculate [H3O+] for each of the following solutions. a)pH = 8.59 i got 3.00e-9 but it said it was wrong. what am i doing wrong. im using the equation 10-ph = [H30+]
*April 6, 2011 by Beth*

**math**

How do you solve this? 5x- [1.5 -3.6] [0.2 1.3] [-0.3 2.8]= [-5.6 1.7] 5x/5[-1.5 -3.6] [0.2 1.3] [0.3 -2.8]=[-5.6 1.7] x = [-1.5 3.6] [0.2 1.3] [0.3 -2.8]=[-5.6 1.7] [-1.5 + 0.2 + 3.6 + 1.3] [0.3 + -5.6 + -2.8 + 1.7] x = [-1.3 4.9] [-5.3 -1.1] I have tried to work this out ...
*October 27, 2014 by treshia*

**Algebra**

m=8/9,(6,-4) I can get to the last step but my answer is always wrong what am i doing wrong
*December 6, 2009 by Julie*

**statistics**

Help!!I have tried this several times and come up with wrong answer. WHAT PERCENTAGE OF A NORMAL DISTIBUTION IS GREATER THAN THE MEAN? (GIVE ANSWER TO NEAREST PERCENT)THIS ONE I GOT 68% AND IT WRONG... AND WHAT PERCENTAGE IS GREATER THAN A VALUE THAT IS 1 STANDARD DEVIATION ...
*May 25, 2013 by Sue*

**algebra 1**

sorry but on the last question i posted the wrong equation... (3x^2-8x+1)(-2x^2+x-2) I have heard of the FOIL process but i still tend to do the problems wrong...
*November 15, 2007 by nicole*

**Chem II Oxidation Reduction**

I2 + KIO3 + HCl ----> KCl + ICl Ok, this is my thinking . . . . I^+5 + 4e^- -----> I^+1 Cl^-1 +1e^- -----> 2Cl^-1 I know that this is wrong, because the e^- are all on the same side. What am I doing wrong?
*July 27, 2008 by Ken*

**algebra**

I need help showing me how to do some problems.. 5. 28-0.3y = 0.7y-12 I got 10/400 or 0.025.. and 3c-4c+1=5c+2+3 I ended up getting c=1 but the book says it's wrong too.. What am I doing wrong?
*October 5, 2010 by Katherine*

**Please check **

Compelete the following table for an ideal gas. P= 7.74*10^3 Pa V= 10.3 mL N= ? T= 25°C I'm getting 3.20e-4, but my online homework says its wrong, what am I doing wrong?
*June 27, 2013 by Mary*

**Chemistry please help**

Compelete the following table for an ideal gas. P= 7.74*10^3 Pa V= 10.3 mL N= ? T= 25°C I'm getting 3.20e-4, but my online homework says its wrong, what am I doing wrong?
*June 27, 2013 by Mary*

**Algebra where did I go wrong**

evaluate the expression 5C2 5! 5-2!= my 1st answer was 20 than 120 either one was right. where do I go wrong Thank so much for your time
*May 22, 2014 by Mary Ann *

**Writing**

My corrections (please check grammar...etc): As I reflected back I realized that my friends got better grades than me. ...better grades than me... What is wrong with this? ...seek for help... What is wrong with this? ... it instead learns... What is wrong with this? Literally...
*June 30, 2013 by Anonymous*

**History**

I need loads of info on why slavery is wrong. It must say why making people live in harsh conditions is wrong aswell.
*March 3, 2009 by Nabiha*

**math**

hi i need to solve this question but i don't know how to do it when there is dividing included x(x-8):5=92 i did this much and then i found out that what i was doing was wrong x(x-8):5*5=92*5 2x-8=460 2x=468 x=234 but it seems wrong
*October 27, 2010 by louise*

**Chemistry**

Calculate the pH after 0.13 mol of NaOH is added to 1.00 L of the solution that is 0.57 M HF and 1.13 M KF. I got the answer of 3.66 to 3 sig figs, but it's wrong. Can you please tell me what I did wrong? -Thanks
*March 27, 2011 by Katrina*

**Chemistry**

What is the energy of a photon corresponding to radio waves of frequency 1.475 106 /s? I got 9.77e-28 as an answer and its wrong so what is wrong with my calculations.
*June 12, 2011 by Lance*

**philosophy**

can anyone tell me is there any strong response aganist norcoss argument that if it wrong to kill puppies, so it is also wrong to support farming factory
*December 8, 2011 by jessica *

**Chemistry problem check **

Compelete the following table for an ideal gas. P= 7.74*10^3 Pa V= 10.3 mL N= ? T= 25°C I'm getting 3.20e-4, but my online homework says its wrong, what am I doing wrong?
*June 27, 2013 by Mary*

**math**

When I worked this problem out I got the answer $250.80. It was graded wrong. Can you explain what I did wrong. A deposit of $8,000 at 9.5% for 120 days $
*July 10, 2013 by sarah*

**math**

When I worked this problem out I got the answer $250.80. It was graded wrong. Can you explain what I did wrong. A deposit of $8,000 at 9.5% for 120 days $
*July 10, 2013 by sarah*

**tere**

what did i do wrong? i need to find lowest vapor pressure. a 0.13 m FeCl3 b 0.50 m sucrose c 0.24 m NaNO3 d 0.15 m Na2PO4 so i solved. a 4 x 0.13 = 0.52 b 1 x 0.50 = 0.50 c 5 x 0.24 = 1.2 d 7 x 0.15 = 1.05 i chose C but the answer is A. did i do something wrong?
*October 16, 2010 by chemistry*

**Math: Trig**

What is Arcsec(-2) equal to and how can you find the correct answer? I got 2pi/3 but it was marked wrong on my test and I'm not sure why it's wrong. Can you please explain this to me? Thanks!
*June 16, 2014 by Cici*

**English**

Why did it go wrong? What is the opposite of 'go wrong'? is it 'go right'?
*March 19, 2009 by John*

**physics**

I DONT KNOW WHAT IM DOING WRONG!!!!!!NASA has built centrifuges to enable astronauts to train in conditions in which the acceleration is very large. The device in the figure below shows one of these "human centrifuges." If the device has a radius of 8.3 m and attains ...
*September 21, 2010 by tom *

**French**

I'm having difficulty with these two sentences. There is something wrong with them and I can't figure out what it is. I'm pretty sure it have to do with pluralization but I don't know what I'm doing wrong. Ils avaient un job. Ils travaillaient dans un garage. & Vous n'aviez ...
*June 11, 2012 by Lissa*

**dif. bet. Mm and mm**

I was just working on a problem and i seem to keep getting it wrong. I think i might be converting wrong. all im wondering is.. is Mm the same as mm(millimeters)?
*August 24, 2010 by Hannah*

**chem class**

What is the pH of an aqueous solution at 25.0 °C that contains 3.98 × 10-9 M hydroxide ion? i posted this before and i tried solving it but i get it wrong 14 = ph + - log (3.98 × 10-9) 14- 8.4 = ph 5.6 = ph but the correct answer is 8.400 what did i do wrong?
*November 21, 2010 by jessie*

**Can someone please check my answer for chemistry **

Compelete the following table for an ideal gas. P= 7.74*10^3 Pa V= 10.3 mL N= ? T= 25°C I'm getting 3.20e-4, but my online homework says its wrong, what am I doing wrong?
*June 27, 2013 by Mary*

**Math**

75 + -63 + 7( 115/ -5 + (-8)2 ) -63 is -6 to the third power and (-8)2 is (-8)to the 2nd power. I got 15913 I think that that is wrong and my calculater wouldn't fit all the numbers so I don't know how to check it! Can you please try it so I can double check answers? it is ...
*October 29, 2006 by Lanna*

**Math Help Please! **

My investment in Edgewater stocks is losing half its value every 2 years. Find and interpret the associated decay rate. If I use the formula y=100(1/2)^x (<-- Is that correct?) I got the answer of 0% (its wrong), I used a different formula, which should be wrong and got the...
*February 29, 2012 by Amie*

**Math**

First, give the technology formula for the given function and then use technology to evaluate the function for the given values of x. (Round your answers to four decimal places.) r(x) = 4x2 + 1/4x2 − 1; x = −1, 0, 1, ..., 9 f(6)= f(7)= For f(6), I got 1.0103, but ...
*February 5, 2012 by Anonymous*

**French**

my teacher marked these phrases as wrong but i don't know what about them is wrong: 1. je revelerais sans prevenir 2. j'ai vendu mes robes plus jolies both of them need "un mot a ajouter"
*October 10, 2007 by JJ*

**chemistry**

0.10 M methylamine (CH3NH2) kb= 4.38e-4 calc the percent ionization so i did the ICE table to find that x=6.26e-3 and then i divided by .1 and then multiplied by 100. but i got the wrong answer whats did i do wrong?
*February 14, 2009 by Spencer*

**alegbra**

find the monthly payment for a loan. Round off to the nearest cents. I did 300*0.10 = 30.00 330.00 divide by 12 years 27.50. Where did I go wrong. It say my answer is wrong. Thank you for who ever helps me
*May 15, 2014 by Mary Ann *

**Physics *work shown ~ pls help!**

An electron is accelerated by a 6.4 kV potential difference. The charge on an electron is 1.60218 × 10^−19 C and its mass is 9.10939 × 10^−31 kg. How strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.1 cm? Answer in ...
*April 15, 2011 by cr*

**chemistry**

I posted a question similar to this one a few days ago and someone helped me with it. but now im on a similar one and i did the same thing to find the answer but it was wrong. what am i doing wrong? An equilibrium mixture of the following reaction was found to have [CH4] = 0....
*April 17, 2011 by Rebekah*

**US history HELP**

From late 1941 into early 1942, World War II in the Pacific experienced: 1.(i am not sure) a string of American victories that put Japan on the defensive 2.(wrong) the Japanese invasion and capture of Australia 3.(wrong) the Japanese on the Philippines surrender to General ...
*November 13, 2011 by HM*

**Math SOMEONE PLEASE PLEASE PLEASE PLEASE HELP**

Find sin(θ), cos(θ), tan(θ). Assume a = 40, b = 9, and c = 41. (Do not use mixed numbers in your answers.) Okay for some reason I keep getting this problem wrong. For sin(θ) I put 9/41, but it's wrong. Could someone please tell what I did wrong.
*December 13, 2010 by Anonymous*

**chem**

For each of the following equilibria, use Le Chatelier's principle to predict the direction of reaction when the volume is increased. (a) C(s) + H2O(g) CO(g) + H2(g) (b) 2 H2(g) + O2(g) 2 H2O(g) (c) 2 Fe(s) + 3 H2O(g) Fe2O3(s) + 3 H2(g) a i put no change because there are the ...
*February 21, 2013 by Hannah*

**weird maths sum!!**

The questions is simply: Find the range of values of x for which x(2-x)<-15 This is what i did: x(2-x)+15<0 2x - x^2 + 15 < 0 -x^2 + 2x + 15 < 0 (x+3)(-x+15) < 0 -3<x<5 but when i check by subbing the number, say, 4 into x, the answer is always greater ...
*June 16, 2009 by Bailey*

**math**

perform indicated operations. (a+3)/(5a+25)-(a-1)/(3a+15) (a+3)/5(a+5)-(a-1)/3(a+5)=(a+3)5(a+5)/5(a+5)3(a+5)-(a-1)5(a+5)/5(a+5)3(at5)= 5a^2+25a+15a+75+5a^2+25a-5a-25/5(a+5)3(a+5) i got (10a^2+60a-50)/5(a+5)3(a+5)and that's wrong. where did i go wrong?
*December 7, 2011 by Ruthie*

**math**

what percent of 300 is 60 F)20% G)50% H)2% J)5% i think I'm just doing it wrong because i got (180) and then the 2 time i got (500) so do you mind telling me what Am doing wrong
*March 23, 2010 by nick*

**math-calculus**

i think i do something wrong again(2x+1)/(x-3)-(4x-1)/(2x-3) = 0 (2x-3)(2x+1)-(4x-1) = (0)(x-3)(2x-3) 4x^2+2x-6x-3-4x-1 = 2x^2-3x-6x+9 4x^2-4 = 2x^2-3x-6x+9 -2x^2-9x+13 i put this in quadratic formula and i think it wrong becaue i get 9/2 and 0for x and it have to be 2/3.
*January 7, 2012 by Shreya*

**Math-- PLEASE CHECK**

234 - 145 3/4 233 4/4 -145 3/4 ___________ 88 1/4 or am I wrong? How do I solve this if I am wrong? Thank you!! you're correct
*February 22, 2007 by Candace*

**Algebra**

I solved (2x-8)/z=y, and got 2yz-8=x as an answer, which my teacher said was wrong. What would the right answer be then? What did I do wrong? Thanks!
*February 10, 2009 by Kerry Hennessy*

**integral calculus**

intergrate the following: a) (y+1)^-1 dy b) (1+1/x) dx I think the answers are: a)ln(y+1) + C b)x + ln (x) + C but I am not to sure about them. Can you please tell me if they are right/wrong and if wrong, show me how to get it/them right....
*December 29, 2007 by josh*

**Algebra**

On my quiz for (3x+2)^2, I wrote the answer as 21x=4. My teacher gave me a minus one, which meant it was half wrong. What is wrong about my answer? Thanks
*September 22, 2009 by Amelie*

**math**

the question asks to integrate cos(t)/(5sin(t)+8)^2 the answer i got was xcos(t)/(5sin(t)+8)^2 i think the x is wrong but i am not sure what i am doing wrong...help please.
*November 19, 2009 by sonia*

**Physics**

Which of the following are the correct units for mass? Tons, u, g, slugs, dyn, lb, oz, kg I put g, slugs, and kg but got it wrong. What part do I have wrong?
*September 28, 2014 by Sandra*

**Calculus**

After t hours of an 8-hour trip the distance a car travels is modeled by: D(t)= 10t + (5)/(1+t) - 5 where D(t) is measured in meters. a) derive a formula for the velocity of the car. b) how fast is the car moving at 6 hours? c) derive a formula for the car's acceleration. I'm ...
*March 18, 2007 by Aletha*

**chem**

Calculate the solubility of magnesium hydroxide (Mg(OH)2), ksp=1.1x10^-11? i have done this problem so many times and keep getting it wrong, i know the answer is 1.4x10^-4 but how do i get there? i did an ice chart and tried doing the cube root but its wrong. help!
*December 12, 2010 by jessie*

**Maths ..equation**

Is this right please .... 3( y - 4 ) - 2 ( 5 - 6y ) = 3 x y = 3y, 3 x - 4 = - 12 -2 x 5 = -10, - 2 x -6y = - 12y Therefore, 2y -12 -10 -12y If I am wrong can you advise where I am going wrong .Thanks !!!
*October 24, 2007 by leo*

**pre-cal**

Solve (x+2)/(x+1) -2 < 0 I know the LCD is x + 1. (x+2-2x-2)/(x+1) < 0 (-x )/(x+1) < 0 But somehow, I got the wrong answer. The answer is (4, 7]. But I don't know where I went wrong.
*September 18, 2010 by Priscilla*

**Math**

How would you order the following from least to greatest? 1/4, 0.2, 3/8, 30% Would it be 0.2, 1/4, 30% and 3/8? This was my answer but it was marked wrong? Where did I go wrong? Thanks for your help
*November 10, 2014 by Kyle*

**chemistry**

85.0 of is initially at room temperature (22.0). A chilled steel rod at 2.0 is placed in the water. If the final temperature of the system is 21.2, what is the mass of the steel bar? Specific heat of water = 4.18 Specific heat of steel = 0.452 My answer was 32.752. I rounded ...
*March 26, 2013 by Joshua*

**chemistry**

85.0 of is initially at room temperature (22.0). A chilled steel rod at 2.0 is placed in the water. If the final temperature of the system is 21.2, what is the mass of the steel bar? Specific heat of water = 4.18 Specific heat of steel = 0.452 My answer was 32.752. I rounded ...
*March 26, 2013 by Joshua*

**Chemistry II**

What am I doing wrong? I am trying to balance the equation: NO3^-(aq)+Sn^2+(aq)-->Sn^4+(aq)+NO(g) here are the coefficients I have. what is wrong with them? 2NO3^-(aq)+3Sn^2+(aq)+8OH-(aq)-->3Sn^4+(aq)+2NO(g)+4H2O(l)
*April 27, 2010 by Carl*

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