Monday

December 22, 2014

December 22, 2014

Number of results: 48,769

**Math - Precision and Significant Digits**

Please help me with the following: Find each product or quotient. Use significant digits. 0.0505m x 665m A. 33.6 m^2 B. 33.58 m^2 C. 33.50 m^2 D. 3.582 m^2 I think the answer is A. Is this correct? Please help me by checking my answer. Any help will be appreciated!! :) P.S.: ...
*August 30, 2014 by Brady*

**Calc. Checking Answer**

Find the antiderivative by hand in each case. S stands for the integral sign I want to make sure I am doing these correctly. A) S x*sqrt(10 + x^2) dx So, u= 10 + x^2 du= 2xdx du/2= xdx (1/2) S sqrt(u) du (1/2)*((u^(3/2))/(3/2)) (1/2)*(2/3)*(u^(3/2)) (1/3)*(u^(3/2)) = (1/3)*(10...
*April 6, 2011 by Chelsea*

**algebra (checking answer)**

Checking to make sure I did it right.. Remainder theorem to find the remainder when f(x) is divided by the given x-k f(x)=x^3-4x^2+2x+4; x+2 2 x -4 2 4 1 2 -4 4 1 -2 -2 8 2)x^3-4x^2+2x+4. (X^3-2x^2-2x) is the answer x^3 -2x^2+-2x -2x^2+4x 6x+4 -2x+4 8x+8 I'm not sure the ...
*March 20, 2013 by Anonymous*

**Earth Science - Please Check My Answer**

Please help with the following: Dani wants to measure the volume of a pebble. Which tool will give the most accurate measurement? A. a ruler B. a tablespoon C. a measuring cup D. a graduated cylinder I think the answer is mostly D. Is this correct? Please help me by checking ...
*October 2, 2014 by Brady*

**Garland High school**

Suppose you must maintain a balance of least $500 in your checking account in order to have free checking. The current balance in your checking account is $635.27. Which inequality describes how much can write a check for a and still have free checking? A. 635.27>500-x B. ...
*December 30, 2010 by Maria*

**algebra 1**

A college student is looking at her monthly checking account records. On September 1, 2008, her checking account held a balance of $1,050. At the end of March 2009, her checking account held a balance of $800. What is the monthly rate of change for the students checking ...
*September 6, 2013 by sabina brown *

**math**

A college student is looking at her monthly checking account records. On September 1, 2008, her checking account held a balance of $1,050. At the end of March 2009, her checking account held a balance of $800. What is the monthly rate of change for the students checking ...
*December 13, 2013 by Beebee*

**algebra**

A college student is looking at her monthly checking account records. On September 1, 2008, her checking account held a balance of $1,050. At the end of March 2009, her checking account held a balance of $800. What is the monthly rate of change for the students checking ...
*January 10, 2014 by 1215*

**Algebra 1**

A college student is looking at her monthly checking account records. On September 1, 2008, her checking account held a balance of $1,050. At the end of March 2009, her checking account held a balance of $800. What is the monthly rate of change for the students checking ...
*August 21, 2014 by Sabrina*

**math**

A college student is looking at her monthly checking account records. On September 1, 2008, her checking account held a balance of $1,050. At the end of March 2009, her checking account held a balance of $800. What is the monthly rate of change for the students checking ...
*October 23, 2014 by danielle*

**communication**

Repeating in your own words the verbal content of the critic's message is: paraphrasing. checking for feelings. checking for inferences. buying time with limited agreement.
*June 24, 2010 by anna*

**Math**

Avirus scanning program is checking every file for viruses. It has completed checking 40% of the files in 300 seconds. How long should it take to check all the files?
*April 4, 2008 by Ms. Teri*

**math**

A virus scanning program is checking every file for viruses. It has completed checking 40% of the files in 300 seconds. How long should it take to check all files?
*July 23, 2008 by Ann*

**Caplan**

A virus-scanning program is checking every file for viruses. It has completed checking 40% of the files in 300 seconds. How long should it take to check all the files
*January 29, 2009 by Julie*

**math**

Business and finance. Avirus scanning program is checking every file for viruses. It has completed checking 40% of the files in 300 seconds. How long should it take to check all the files?
*April 9, 2009 by Allen*

**Math**

I haven't done factoring in ages I'm trying to factor this X^2 - 2X + 8 If i remeber correctly sense the leading coefficent is 1 the factored form is in this format (X-A)(X-B) which would give you X^2 -AX - Bx + AB or simply X^2 -(A+B)X +AB so then in my problem -(A+B)X = -2 ...
*January 3, 2010 by Kate*

**algebra**

After solving a system of linear equations, how can you check your answer to determine whether it is correct? Demonstrate the process of checking an answer with an example
*June 9, 2011 by Gladys *

**math 116**

After solving a system of linear equations, how can you check your answer to determine whether it is correct? Demonstrate the process of checking an answer with an example.
*March 10, 2010 by earl*

**Math**

5(2a + b)-2(3a-5b) Is the answer 4a+15b just checking
*October 8, 2013 by Abby*

**Calc. checking answer**

Determine whether or not each of the following functions is invertible. Give your reasons for believing the function is invertible or not. Please check this for me. I am not sure if I am adequately explaining my answer and if my answer is right. a) y= log10(1 + 1/x) y'= ((1/(1...
*March 23, 2011 by C*

**Math 3371**

In a certain year, 26% of all teenagers in the United States had checking accounts. Your bank, TeenChex Inc., is interested in targeting teenagers who do not already have a checking account. (a) If TeenChex selects a random sample of 3,000 teenagers, what number of teenagers ...
*November 24, 2014 by John*

**pre-algebra**

Terry has 43 dollars in a checking account.If terry writes a check for 62 dollars what is the new checking balance?
*September 17, 2012 by emily h*

**Career Explorations - Please Check my Answer**

Please help me with the following question: Which statement describes the relationship between being a waitress and being a restaurant manager? A. Being a waitress is a job, while managing a restaurant is a career. B. Being a waitress and managing a restaurant can be different...
*September 4, 2014 by Brady*

**Math**

Tonia deposited a total of $174.52 into her checking account. She also withdrew a total of $186.15. Use addition to find the net change in Tonias checking account.
*September 25, 2011 by Caitlin*

**math**

The product of 3^4*3^-2 is so I multiplied the exponents and got 4*-2 =-8 so my answer is 3^-8 Is this correct? Thanks for checking my work
*January 26, 2014 by B8*

**D/dt**

Calculate d/dt when a=t^2, b=2 and sqrt(x+1)dx. My answer turns out to be incorrect despite my checking it several times. I got -2/3t* sqrt(t^2+1) Can someone explain to me what is wrong with my answer and how to go about obtaining it the right way? Thank you everyone. :-)
*May 15, 2013 by Leah*

**Algebra II**

Solve, round to four decimal places if necessary: log4(x-9)=2 Answer: x-9=4^2 x-9=16 x=11 log4(z)+log4(z-3)=1 Answer: z+z-3=1 2z=4 z=2 Thanks for checking my work.
*March 29, 2008 by Lucy*

**Math - Please Check My Answer**

Please help me with the following: Find the greatest possible error for each measurement. 4 1/2 oz A. 1/4 oz B. 2 1/2 oz C. 1 oz D. 2 1/4 oz I know it is not B(I got it wrong.), but I think it is A. Is this correct? Please help me by checking my answer. Any help is appreciated...
*September 1, 2014 by Brady*

**health**

yeah its me again :) and thank you Writeacher for checking my answer on smoking An antihistamine used to treat a common cold is intended to: A. Decongest B. Suppress the cough reflex C. Dry secretions D. Increase mucus clearance I think it could be either A or D but I'm ...
*December 9, 2007 by abby*

**Algebra II**

1)Rewrite 5pi/4 radians in degree measure. Answer: 225 2) Which angle is coterminal with a -400 degree angle in standard position? Answer: 40 Thanks for checking my answers:)
*April 6, 2008 by Lucy*

**Math**

Please help me with the following by checking it. Solve for x: √(2x^2+5)=2 A. 1 B. √2 - (This is my answer.) C. 2 D. None of the above. I am not sure about my answer, can someone check it please. Any help will be greatly appreciated.:)
*April 7, 2014 by Brady*

**Math**

A virus scanning program is checking every file for viruses. It has completed checking 40% of the files in 300 seconds. How long should it take to check all the files? I am not sure how to set this problem up, can someone please help! 40% = 40/100 40/100 = 300/x Solve for x. ...
*May 26, 2007 by Stacy H*

**Math**

What is the net price factor for trade discounts of 25/15/10? Answer: .57375 Just checking my homework answers
*May 20, 2013 by Ann*

**Math**

Another problem with my checking. The teacher says the answer is 280 but when I try to check it I never get the right one (24-d)/16=19
*September 23, 2013 by Jenny*

**Ratios and Rates - Last One!**

Please help me with the following problem: Convert each rate using dimensional analysis. Round to the nearest tenth, if necessary. 4.5 qt / min = ____ gal / h A. 67.5 B. 33.8 C. 56.3 D. 65 I think the answer is A. Is this correct? Please help me by checking my answer. Any help...
*August 24, 2014 by Brady*

**Math**

Barbara had $123.54 in her checking account. she made a deposit of $45.62. when she went shopping later that day, she saw a coat she really wanted. it was on sale for 40% off the original price of $240. Assuming that she bought nothing else that day, does she have enough money...
*September 11, 2013 by Evelyn*

**Algebra II**

Simplify: (y^2+y-20)/(y^2-2y-8) Answer: y+5/y+2 2)Simplify: (1+i)/(2-i) Answer: 1/5+3/5 i 3) Solve 3x^2-8x+4=0 by graphing. If exact roots cannot be found, state the consecutive integers between which the exact roots are located. Answer: 2; between 0 and 1 Thanks for your time...
*April 6, 2008 by Lucy*

**Math**

Hi, would someone mind just checking the answer I got for this formula and tell me if I'm on the right track or not. Question... x+y=21 3x=4y Answer I got... x=84 y= -63 I didn't get that. Check your math. I found 7y=63 but not y = 63. You can always check your answer. Is 4X...
*October 22, 2006 by Jessica*

**Language Arts - Please Check My Answer For This**

Please help me with the following: Read the sentence. Juanita used her affinity for numbers to help her design a computer program that relied on college-level math formulas, even though she was only in middle school. Based on the context clues in the sentence, what is the best...
*September 12, 2014 by Brady*

**Studying for Calc**

I have a quiz on derivatives coming up and I really want to do well, but i'm not sure how to go about studying calc. i have no trouble studying for other subjects, but i'm doing poorly in calc and i need to make some changes in my study habits. any suggestions? i usually work ...
*October 7, 2008 by Elizabeth*

**calc**

what is the derivative of y=ln (1-x^2)^1/2 so its hard for me to write all of my work on here but i got 1/2(1-x^2) as my answer and that is one of the choices but it is not the correct choice. the correct answer is -x/(1-x^2) how did they get this answer?
*December 4, 2013 by hannah*

**finance**

computing checking account balance. based on the following information,determine the true balance in your checking account. balance in your checkbook-$356 balance on bank statement,$472 service charge and other fees, $15 interest earned on account $4 total outstanding checks $...
*February 11, 2012 by sharon*

**algebra**

Delila has $1200 in a saving account and in a checking account. The ratio of money in saving to money in the checking is 3 to 2. Use a system of equation to find how much money is in each account .
*April 12, 2012 by unknown*

**math**

MS.powell has -$25 in her checking account after withdrawing money from the atm .How much did Ms.Powell withdraw if she had $85 in her checking account before she withdraw the money?
*July 10, 2013 by LESLIE*

**pre calc**

Solve the lograthmic function: ln(X+5) = ln(X-1) - ln(X+1) The answer has no solution but I do not know how to come to that answer. Help is greatly appreciated!
*March 23, 2011 by Laura Grace*

**History**

What is the goal of Japan in World War 2? A. to defeat Germany B. to capture China C. to extend its empire Is the correct answer C? Thank You for checking!
*June 22, 2010 by Anonymous*

**MATHS**

A CONE WAS CONSTRACTED FROM PLASTIC, HAVE A HEIGHT OF 20cm (PART C). THE LID IS MADE UP OF HEMISPHERE HAVE RADIUS 0F 5cm (PART A) AND PYRAMID HAVE VOLUME OF 81,667cm. THE LID FITS EXACTLY OVER THE CONE. A) CALC. THE VOL. OF PART A. B) CALC. THE VOL. OF PART C. C) CALC. THE ...
*August 9, 2010 by MTHOMBENI BAFANA*

**Science - Maps and Computers - Please Check**

Please help me with the following: A single ocean color satellite can collect how many data points? A. 2,000 B. 2,000,000 C. 20,000 D. 2,000,000,000 I know the answer is not D, because I got it wrong. I think the answer is mostly A, but I also think it is possibly B. Is A ...
*November 14, 2014 by Brady*

**statistics**

The First National Bank of Wilson has 680 checking account customers. A recent sample of 60 of these customers showed 32 to have a Visa card with the bank. Construct the 98 percent confidence interval for the proportion of checking account customers who have a Visa card with ...
*October 31, 2011 by Nathalia*

**calc check**

if you evaluate the integral of: t csc^2 t dt, is the answer -t cot t + ln|sint| + C Differentiate the answer to see if it is correct.
*May 23, 2007 by marsha*

**Pre-Calc**

Can someone check this? Thanks! :) Which pair(s) of functions are inverses? There may be more than one correct answer. a.) f(x) = x - 12, g(x) = x + 12 b.) f(x) = 3x, g(x) = 1/3x c.) f(x) = 4x, g(x) = -4x d.) f(x) = 2x + 1, g(x) = 2x - 1 My answer: A & C
*September 30, 2014 by Sofia*

**Math**

Please help me with the following by checking my answer. The length of the hypotenuse of an isosceles right triangle is √6 inches. How long, in inches, are the legs of the triangle? A. 3 B. 6 C. √3 - (This is my answer.) D. √6 I am not sure on my answer, ...
*April 8, 2014 by Brady*

**Calc**

Question: Using trigonometry, add these two vectors. 7m/s [N30E] and 2m/s [S17E]. THIS is my answer: 6m/s [N45E] is this the correct answer?
*June 29, 2008 by katie*

**Pre-calc**

The question is solve for cosx= 0.60 on the interval [0,2pi). The answer is to be posted in radians. I don't understand how to find the answer.
*October 7, 2010 by Katie*

**Pre-Calc**

Which pair(s) of functions are inverses? There may be more than one correct answer. a.) f(x) = x - 12, g(x) = x + 12 b.) f(x) = 3x, g(x) = 1/3x c.) f(x) = 4x, g(x) = -4x d.) f(x) = 2x + 1, g(x) = 2x - 1 Would the answer be just letter B.)?
*October 1, 2014 by Iggy*

**Pre-Calc/Calc**

Which set of parametric equations corresponds to this rectangular equation? y=2x-(x^2 / 10) A. x=4t, y=4t-(t^2 /10) B. x=2t, y=8t-(4t^2/10) C. x=2t, y=4t-(4t^2/10) D. x=.5t, y=2t-(t^2/10) E. x=t, y=t-(t^2/10)
*April 17, 2013 by Chris Math Hw Help*

**Algebra**

ello i need help factoring I haven't had factorin sense Algebra one and now am in Algebra two and our school is screwed up were they shove in a year of Euclidean Geometry and Basic Trig inbetween first two years of Algebra... so i need to factor X^2-12X+35 I can sit there for ...
*December 7, 2008 by Algebra*

**calc**

Let f(x)= 4 and g(x)= x-2 : X2 - 4 f o g(11)=ANSWER: X-2/ 11-2 =9=3 4/32 -4 = 4/5 f o f(0)=ANSWER Determine the Domain of f o g=ANSWER:
*December 18, 2011 by john*

**statistics math**

MEAN =10 & STANDARD DEVIATION =2. FIND THE PROBABILITIES: 9.4 X 10.6 i have 2 different answers but am checking the answer. thank you one is 0.6179 the other is 0.2358
*March 8, 2011 by Jeannie *

**ALGEBRA**

Checking algebra answer, Is it correct? 320km/1hr ↓ 320km /1hr →1m/1.609km =320m/1.609hr=199.3mph Answer: Round to nearest 10th =198.9mph
*August 25, 2014 by ALGEBRA*

**Algebra answer for checking**

relation or function? x^2 = 1 + y^2 This is a function because relations cannot be an equation right?
*October 5, 2007 by Lizzy*

**Science **

Ms.Sue would you mind checking my answer? Question~ What make sit possible for plants to complete photosynthesis? _________________________________________ My Answer~ For plants to complete photosynthesis they need water,carbon dioxide and light.
*January 11, 2014 by Anonymous *

**Calc**

Can someone help me with this calc problem? lim as x->0 (tan^3 (2x))/(x^3)
*January 8, 2009 by Nick*

**help chem!:/**

a) Calc. PH of 0.010 M HF and 0.030 M KF e) calc. PH Zn(OH)2 in wAter
*March 15, 2012 by ALISON*

**chemistry**

Just checking an answer... I was given Aluminum + Sulfur yields.. & I was to finish & balance & answer the questions. 2Al + 3S => Al2S3 If 1 mole of sulur reacts, how many moles of aluminum sulife are produced? .166 mol Al2S3 How many grams of aluminum sulfide is this? 24.9 g
*March 31, 2008 by anna*

**Pre Calc**

Does this: sqrt 3x-4=(x-4)^2-3 Multiply out to: x^4-16x^3+90^2-211x+173 I then need to put it in the graphing calc and see what the roots are.
*September 10, 2009 by muffy*

**checking to see if this is right**

just checking to see if i have this problem correct Sammy can cut wood twice as fast as Joe. When they both work together, it takes them 4 hrs. how long would it take them to do the job alone? 4/x +4/x+2 = x^2+2 4x+4x+8= x^2+2 8x+8= x^2+2 x^2-6x-8=0 (x-4)(x+2) x=4 x=-2 since i...
*March 2, 2011 by Paige*

**Calc **

Use the Intermediate Value Theorem to check whether the equation x^33x+2.1=0 has a root in the interval (0,1) answer: yes or no ? i have no idea how to answer to go about solving this question, thanks for the help!
*January 25, 2012 by UCI STUDENT*

**calculus (limits)**

lim h>0 sqrt(1+h)-1/h not sure how to factor this; not allowed to use L'Hopital's Rule. (that isn't taught at my school until Calc II & I'm in Calc I).
*January 22, 2011 by John*

**Algrebra II-please check my answer**

Determine the zeros of the function 7x^2 + 9x = 0 answers were: {-9/7} {-9/7,0} {o,9/7} {9/7} I think the answer is {-9/7,0} but I'm not positive when I worked it-If this is wrong please steer me into the correct calcs because then I don't what I'm doing wrong 2.Solution to ...
*January 14, 2011 by Sammy*

**stats-please help**

MEAN=10 & STD DEVIATION=2. FIND THE PROBABILITIES: 9.4 less than X less than 10.6? i have 2 different answers but am checking the answer. thank you
*March 8, 2011 by jean *

**algebra**

solve by using the quadratic formula prove your answer is correct by checking can someone please show me how to do this step by step 2x^2+3x+4=0
*October 5, 2013 by johnnie*

**Math**

which ordered pair is the solution of the following system of equations? y=2x-3 x+y=3 1) (1,2) 2)(2,1) 3)(3,0) 4)(3,3) MY work: y=2x-3 x+(2x-3)=3 3x-3=3 +3 +3 3x/3=6/3 x=2 x+y=3 2+y=3 -2 -2 y=1 so I got (2,1) which would be answer 2 Is this correct? Thanks for checking my work
*January 10, 2014 by B8*

**math**

what is the slope of the line represented by the equation 4x+3y=12 1) 4/3 2) 3/4 3) -3/4 4)-4/3 I did 4x+3y=12 -4x -4x 3y=-4x+12 /3 /3 divide each side by3 y=-4/3x+4 so I got answer 4 because the -4/3 is the slope Is this correct? Thanks for checking my work
*May 25, 2014 by b8*

**Pre-Calc**

Use the fundamental identities and appropriate algebraic operations to simplify the expression. cosx / (1+sinx) Answer: secx Can someone please assist as to how I get to the answer?
*April 28, 2011 by Lizette*

**social studies 7th**

I am checking my child's homework. Can you help? During what years was the Civil War fought? My child's answer is- The Civil War was fought over the span of four years. I really do not think this is the answer the teacher will be looking for. What do you think? I thought the ...
*September 17, 2011 by Mom needs help!*

**Math - Please Help Check My Answer**

Please help me with the following question: A student attempts to solve for c in the equation below. Which statement best applies to the work shown below? 3c + 6 - 4c - 12c = 7 -13c + 6 = 7 -13c + 6 + (-6) = 7 + (-6) -13c = 1 c = -1/13 A. The student followed all rules ...
*October 22, 2014 by Brady*

**Calc.**

What function would have a derivative of ′(x) = 12x2 + 4x − 10? Explain how you arrived at your answer...I believe the answer is this: f(x)=4x^3+2x^2-10x...and I got this using the power rule and multiplying. Thanks.
*July 16, 2008 by Derek*

**Brief Calc**

e^x y =3 find dy/dx using implicit differentiation the answer is -y Compare your answer with the result obtained by first solving for y as a function of x and then taking the derivative. y=? dy/dx=? help me out with these last two please I don't know what they are asking
*September 25, 2013 by James*

**algebra1**

the problem is 5f+7 less than or equal to 22. can anyone please work this out for me and check it for me? and what i mean by checking it is like when you get the answer you check it and make sure its write.
*October 1, 2013 by erica*

**econ.**

If the reserve requirement is 20% and a bank doesn't have excess reserves, why would a $100 deposit lead to a greater than $100 increase in the money supply. because of the money multiplier. A $100 deposit (e.g., into a checking account) gives the bank both a $100 liability ...
*May 6, 2007 by Carter*

**Pre-Calculus-check answers**

Which of the following results in the graph of f(x)=x^2 being expanded vertically by a factor of 3 and reflected over the x-axis? a) f(x)= (1/3)x^2 b) f(x)= -3x^2 c) f(x)= (-1/x^2)+3 d) f(x)=(-1/3)x^2 Answer: d Thanks for checking my answers
*August 10, 2008 by Lucy*

**Calc**

I need help with these two questions. I'm not getting the same answer in the back of the book. f(x) = (1+x^4)/(x^2) for which I got (6x^5-2x)/(x^4) and the answer at the back is (2x^4-3)/(x^3) And this question I don't get at all. f(x) = (5-(1/x))/(x-3)
*May 28, 2008 by Sam*

**English**

Could you please check these statements, please? Thank you. 1) the first who trusts/to trust are both possible? 2) "Let's check the answer to those exercises" She proposed checking the answers... She told/ordered us to check.... She suggested checking the answers She ...
*January 6, 2012 by Henry2*

**Calc**

lim h->0 (((1/(1+h))-1)/h I don't understand how the answer is -1 shouldn't it be 0?
*September 20, 2009 by sh*

**calc**

Let f be the function defined by f(x) = (x 2 + 1)e -x for -4 < x < 4. a. For what value of x does f reach its absolute maximum? Justify your answer. b. Find the x-coordinates of all points of inflection of f. Justify your answer.
*February 23, 2010 by john*

**math**

from the expression below, which one is not factorable? 1)x^2+4x+6 2) 3ab^2-16a 3)x^2-441 4)4x^2+19x-5 I thought the answer was 2) b is not in the second part of the equation(the 16a) Is this correct? Thanks for checking my work
*February 10, 2014 by B8*

**Calculus (Area Between Curves)**

Find the area of the region IN THE FIRST QUADRANT (upper right quadrant) bounded by the curves y=sin(x)cos(x)^2, y=2xcos(x^2) and y=4-4x. You get: a.)1.8467 b.) 0.16165 c.) 0.36974 d.) 1.7281 e.) 0.37859 Based on my calculations, I would say that the answer is e.) 0.37859. I ...
*February 29, 2012 by Mishaka*

**ap calc**

Let P(3,4) be a point on the circle x2 + y2 = 25. calculate the Lim Mx as x approaches 3. How does this number relate to your answer in part b? Part b the answer was to find the slope Mx of the line joining P and Q which is M=4-(root(25-x2))/3-x.
*October 6, 2014 by pinky*

**stats-please help**

repost MEAN=10 & STANDARD DEVIATION =2. FIND THE PROBABILITIES: 9.4 less than X less than 10.6 i have 2 different answers but am checking the answer. thank you one is 0.6179 the other is 0.2358
*March 8, 2011 by jean *

**Calc or Pre calc**

I am having trouble doing this problem. I know how to do indefinate integrals, but I don't know how to do definate integrals. Can you show me how to do this. Evaluate 5 (x^3-2x)dx 2
*May 14, 2008 by jennifer*

**Calc 2**

i need to take the limit as x-->0 of 3x^2csc^2(x)...Is the answer 0?
*February 29, 2008 by Jessica*

**Pre-Calc**

y=cos^-1(6pi/7) Is the answer undefined? Thanks for your help.
*February 8, 2011 by Johanna*

**Calc I**

Find the derivative of y=(x^2 + x^3)^4 What I got: 4(x^2+x^3)^3 * (2x+3x^2) The correct answer: 4x^7(x+1)(3x+2) How did they get that?
*December 7, 2014 by Brian*

**calculus**

I was doing calc hw and I am stuck on a part of a question. =(1/10)-(x/15sqrt(x^2-9)) I am supposed to put this equation equal to 0 and solve for x. The answer is 9/sqrt(5) but I don't understand how the answer comes out to be 9/sqrt(5). Please help. Thank you.
*February 25, 2012 by cj*

**Math**

If (a,-3) is a point on the graph of y=x^2+4x, what is the value of a? so far i have -3=x^2+4x i can do the problem on my graphing calc but we can't use a graphing calc on the test so i need to know how to do it by hand. what do i do next?
*January 20, 2010 by Karen*

**geography**

I am just checking to see if my son's answer is right. Which of the following professional teams play home games in cities located on an ocean: New York Yankees, Chicago White Sox, Los Angeles Dodgers, Cleveland Indians? My son has his answer as Los Angeles Dodgers only
*May 9, 2011 by a Mom*

**calculus**

im using chain rule to answer this question: -5 ((x^2) - 4x + 1)^(1)/(2) tried to use calc to get answer to base off of but this is a nonreal number. does this mean i will have to use imaginary numbers? please help
*January 8, 2014 by eric*

**Calculus**

I have tried calc-chat's method and I always get the answer 12 units but the answer should be 69 according to my key! What do I need to do to get there?? "Use the limit process to find the area of the region between f (x)=10x+8 and the x-axis on the interval [0,3]"
*May 24, 2011 by Christiana*

**algebra (checking answer)**

f(g)=(x-4)^2+6 Sketch a graph of f(x): 4 on y axis and up 6 Identify the vertex: (4,6) Identify the intervals where f(x) is increasing or decreasing: it increasing [6,00) Thanks for your help:-)
*February 20, 2013 by Anonymous*

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