Friday

August 29, 2014

August 29, 2014

Number of results: 65,522

**Calculus **

Simplify as much as possible: e^3ln5 Does the three become an exponent on 5? So.. =e^ln5^3 =25 Can someone verify this for me please?
*October 3, 2010 by Jon*

**Calculus**

Can someone please work this algebra. verify that y(x) = -ln (x - cx^2) satisfies the ODE x(e^y - y') = 2 where c is constant. I have been working through this and it is way too messy.
*September 22, 2009 by Yamada*

**Calculus **

Find the area enclosed by the following functions from x=0 to x=2: y=sqrt*(x+2) y=1/(1+x) I got 2/3(8)-ln3-2/3(sqrt*8) can someone please verify this?
*January 30, 2011 by Rachel*

**Calculus**

What is the integral of 1-tan^2theta from 0 to pi/3? Using the identity tan^2theta=sec^2theta-1, I got my answer to be 2pi/3 - sqrt*3 Can someone verify this for me please?
*January 22, 2011 by Rachel*

**Calculus (can someone please verify this?)**

Gravel is being dumped from a conveyor belt at a rate of 30 ft^3/min. It forms a pile in the shape of a right circular cone whose base diameter and height are always the same. How fast is the height of the pile increasing when the pile is 19 feet high? Vol = (1/3)pi (h^2/4)(h...
*April 12, 2011 by Cecille*

**Calculus**

I need help with these two review calculus problems for my final exam. What is the derivative of a). (5x^2+9x-7)^5 b). Lne^x^3 For a. I got 50x+45(5x^5+9x-7)^4 For b. I got 3x^2 Can you verify please?
*May 21, 2012 by Sam*

**Pre-Calculus**

Can someone please help me with this problem? De Moivres theorem states, If z = r(cos u + i sin u), then zn = rn(cos nu + i sin nu). Verify de Moivres theorem for n = 2. a. Provide a correct proof that includes written justification for each step.
*November 12, 2013 by Latrice*

**Calculus - Riemann Sum**

Given a function f(x) = squr(3 + 2x), on [-1,1], subdivided into 4 equally large intervals, calculate the Riemann sum SR4 = 4Ei=1 f(xi)delta(x). my attempt at the solution: [-1,1], a = -1 and b = 1 delta(x) = 1 - (-1)/n = 2/n xi = a + delta(x)i xi = -1 + 2/n(i) so after adding...
*August 6, 2012 by Robert*

**Math**

Hi - I'm finding this question a bit tricky and think I answered it wrong, can someone please verify for me? Many thanks.... In triangle EFG, find the value of f, if e = 7.3 cm, g = 8.7 cm and <E = 73. Please help
*August 21, 2011 by Dee*

**algebra**

Could someone please verify if this rational equation is undefined? I think that it is: w/2 - 2/w = 0
*January 25, 2010 by sam*

**maths**

Using the following formula for a triangular number, verify that 1225 and 41 616 are triangular numbers. [Hint verify that there is an n for each number that satisfies the equation] e.g., t5 = 15 =(5+1)/2 tn = n(n+1)/2 so, should I plug in 1225 and 41,616 and work the equation...
*November 22, 2007 by Lily*

**Calculus Help Please!!!**

Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answers to three decimal places.) ln(1 + x) ≈ x Y1= I ln(1+x)-x I Y2= 0.1 ...
*April 4, 2014 by Tanya *

**math**

Can someone help me solve the following....using elimination methods 1) 5x+7y=43 -4x+y=25 2)9x-9y=36 7y-3x=-14 I think the answers are would the answer to number 1 be (-4.26,1.52)? would the answer to number 2 be (-0.5,-6.5)? Can someone please verify or tell me what I did ...
*March 13, 2010 by Holly*

**calculus**

How can we verify area of square and rectangle by calculus ?
*December 15, 2011 by Abay*

**Calculus**

Verify if correct or not please =) What is the slope of the normal to y= (x^2-1)/(x+5) at (1,0) a) -3 b) -1/2 c) -1/3 d) 1/3 Answer is A, -3. ---------------------------------------- What is the y-intercept of the line that is tangent to f(x)=4/(3x+1) at (-1, -2)? a)-5 b) -3/4...
*February 21, 2012 by Jake*

**Pre Calculus**

(cotx)(cscx)+secx=(csc^2x)(secx) Please help to verify this trigonometric identity.
*November 4, 2012 by Marie*

**Biology help please**

For which of the following organisms would you expect the DNA sequence to be least similar to the houseflys? A)butterfly B)grasshopper C)monkey D)beetle im pretty sure its monkey but if someone else from connections could verify or help me out that would be great. or someone...
*December 7, 2012 by BaileyBubble*

**early childhood**

Can someone please help me with this? I think I have the right answer--just need verification. Which statement most accurately describes "normal" growth and development of the pre-school child? 1.It occurs at a uniform rate for all chidren. 2.It is a simple process. 3.It has ...
*April 11, 2007 by Bethany*

**calculus **

find the equationss of both tangenr lines to the curve defined by y=(1/x^2), x cannot equal 0 from the external point P(0,1). I tried but i got one equation. Can you please verify if it is: y=-0.38x-1. Thanks
*March 4, 2010 by Anonymous*

**calculus **

find the equationss of both tangenr lines to the curve defined by y=(1/x^2), x cannot equal 0 from the external point P(0,1). I tried but i got one equation. Can you please verify if it is: y=-0.38x-1. Thanks
*March 4, 2010 by Anonymous*

**Pre-Calculus**

Verify: 1/(1-sintheta) * 1/(1+sintheta) = sec^2theta sec^2theta is the answer, it would be great if someone can do the steps for me. thank you.
*January 23, 2012 by natalie*

**math**

Hi - I'm finding this question a bit tricky and think I answered it wrong, can someone please verify for me? Many thanks.... In EFG, find the value of f, if e = 7.3 cm, g = 8.7 cm and E = 73. my answer was 4.73 cm but I'm not confident that I correctly found angle <F...
*August 21, 2011 by Dee*

**Algebra**

I need to write an equation for when the slope is 5/3 and the y-intercept is (0,-3) I got Y = 5/3x +o Cn someone verify for me please also i dont know how to find the slope of x=1
*March 18, 2012 by Amy*

**calculus**

Can someone please tell me what the word "WHOLE" AND "IRRATIONAL" MEAN IN CALCULUS? THANKS
*September 2, 2008 by Mike*

**calculus**

Verify the identity: arctanx + arctan(1/x)=∏/2 using calculus theory. (Hint: Differentiate the left hand side of the identity)
*December 7, 2011 by NYSNC*

**Calculus**

Please verify the answers~ Thank you! 1. Which of the following is the x-intercept of the plane 2x-4z+1=0? a) P(2,0,-4) b) P(0,0,0) c) P(-1/2,0,0) d) P(0,0,1/4) Answer is C. 2. Which of the following is not a direction vector for the plane 3x-2y-z+4=0? a) v(3,-2,-1) b) v(0,-2,...
*April 10, 2012 by Antia*

**Pre Calculus**

(secx)/(tanx)+(cscx)/(cotx)=secx+cscx Please help me verify this trigonometric identity.
*November 1, 2012 by Lainey*

**math**

I need to simplify the following rational exponent: (64n^9)^2/3 I've done the following but don't think this is right: = 3|64n^18 = 4n^2.62 I don't know how to type in the root symbol so I used | to mean root. Can someone please verify this and if incorrect please explain ...
*November 18, 2010 by Dania*

**Chemistry**

Please help verify my answer. Not confident it is right: please verify my answer: Consider the following REDOX reaction: Zn(s) + Pb+2(aq) �� Zn+2(aq) + Pb(s) a. Write the oxidation and reduction half-cell reactions. Zn(s) + Pb+2(aq) �� Zn+2(aq) + Pb...
*June 17, 2011 by Dexter*

**Chemistry**

Please help verify my answer. Not confident it is right: please verify my answer: Consider the following REDOX reaction: Zn(s) + Pb+2(aq) �� Zn+2(aq) + Pb(s) a. Write the oxidation and reduction half-cell reactions. Zn(s) + Pb+2(aq) �� Zn+2(aq) + Pb...
*June 17, 2011 by Dexter*

**Calculus and vectors-Help~David**

Rectangular prism is defined by vectors (2,0,0)(0,9,5) and (0,0,3). Find the volume. I have done this so far, would anyone please verify this. (2,0,0)(0,9,6) (0-2, 9-0, 6-0) =(-2,9,6) (-2,9,6)(0,0,3) =(2,-9,-3) (2)(-9)(-3)=54 cm^3 Therefore volume is 54 cm^3
*March 22, 2012 by Jake*

**Calculus**

The radius of a tank can not exceed 5m, and the height can not exceed 12 m. Is it possible to construct a tank with a volume of 900m^3? If it is possible, determine the minimum amount of material required to make the tank. When i solve it, the radius exceeds the restrictions...
*March 19, 2010 by Jeff*

**Chemistry**

Following question I need help with part b) Please verify my answer for part a) too if possible. Consider the following reaction for silver tarnishing: 3Ag2S(s) + 2Al(s) -> 6Ag(s) + Al2S3(s) a. State the oxidation number for each element in the reaction. 3Ag2S(s) + 2Al(s...
*June 14, 2011 by Dexter*

**Calculus**

Given(x) = e^x, verify that lim (e^x+h-e^h) / h = e^x h->O = and explain how this illustrates that ′(x) = ln e (x) = (x)
*July 15, 2008 by Vanessa*

**Calculus AB**

Verify if the given equations are solutions to the differential equation. dy/dt=k(y-a) i) y=1-ae^(kt) ii) y=a+Ce^(kt)
*February 28, 2011 by dyingincalc*

**pre calculus**

verify functions f and g are inverses of each other by showing that f(g(x)) = x and g(f(x)) = x. f(x)= 5/(2 -x) g (x) = 2 - 5/x
*December 21, 2011 by anon*

**calculus**

verify that y=C1e^2x + C2e^-3 is a solution of the differential equation y''+y'-6y=0
*April 10, 2012 by mari*

**calculus**

Verify the Identity: (Tanx + 1)/(secx + cscx) = sinx
*May 1, 2012 by CLF*

**calculus**

Verify the identity: (tanx+1)/(secx+cscx) = sinx
*May 2, 2012 by ASH*

**Calculus**

Verify please and thank you~ Does the line (x-7)/3=(y+8)/6=(z+4)/5 and the point P(10,-2,1) determine a plane? Answer: Yes, it is a plane because when I substituted the point P(10,-2,1) into the equation, I got the coordinates (1,1,1) If the coordinate became to be (0,0,0) ...
*April 8, 2012 by Jenny*

**Calculus and vectors**

Verify please and thank you~ 1. Does the line (x-7)/3=(y+8)/6=(z+4)/5 and the point P(10,-2,1) determine a plane? Answer: Yes, it is a plane because when I substituted the point P(10,-2,1) into the equation, I got the coordinates (1,1,1) If the coordinate became to be (0,0,0) ...
*April 9, 2012 by Antia*

**Calculus Help Please!!!**

Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answers to three decimal places.) ln(1 + x) ≈ x xE
*March 30, 2014 by Tim*

**Calculus - Verify?**

Find the slope of the tangent line to the curve (a lemniscate) 2(x^2+y^2)^2 = 25(x^2-y^2) it is at pt (3,1)
*February 20, 2011 by Aric*

**Pre Calculus**

Verify the identity: cos x + sin x tan x = sec x.
*March 23, 2011 by Kim*

**calculus**

verify the Intermediate Value Theorem if F(x)=squre root of x+1 and the interval is [3,24].
*December 9, 2011 by piyatida*

**Calculus**

Verify this question 1. Determine lim as x->3 (3x-8)/(4x-12), if it exists. (3(3)-8)/(4(3)-12) =1/0 Therefore it doesn't limit doesn't.
*February 11, 2012 by Matthew*

**algebra II**

How do you verify inverses? the question is y=3x-3... we know how to make an inverse but how do you verify it using composition?
*February 15, 2012 by nicole and brian!*

**Calculus: Derivatives**

I'm having trouble understanding what derivatives in calculus (instantaneous speed) is. Can someone please explain it to me, or provide some easy links to learn from? Thanks!
*September 9, 2007 by Joe*

**Calculus Help Please!!!**

Verify the given linear approximation at a = 0. Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answers to three decimal places.) fourth root of (1 + 2x)≈ 1 + (1/2)x
*March 30, 2014 by JYoung*

**Pre calculus **

Verify Sinx-sinxcos^2x =sin^3x Need every step!!!
*February 10, 2013 by Kristen *

**Calculus help me please!**

Find the value of k so that f(x)= {3x^2+kx+4 if x<0 and 2sqrt(x+4) if x >or equal to 0} is differentiable at x=0 can someone please provide help!!!
*November 27, 2011 by kali mata*

**calculus-can someone please help me with this ques**

find the rate of change of f(x)=x^2+4 a. from -2 to 0 b. from 1 to 3 c. from -2 to 1 please show work
*December 16, 2012 by confused--Please help!!!!*

**calculus**

find the sum. use the summation capabilities of a graphing utility to verify your result. 5 Sigma (3a) k=2 ??
*April 18, 2013 by jessica*

**calculus**

please help! Find an equation of the tangent line to the curve at the point (-1, 1). y = 5x3 - 6x. y=? ...............i keep getting y=x+2 and its wrong. can someone please help?
*January 25, 2011 by nic*

**Calculus**

can someone please explain h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 5 7 0 4 1 1 4 5
*October 31, 2009 by Calculus*

**Calculus**

can someone please explain h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 5 7 0 4 1 1 4 5
*November 1, 2009 by Calculus*

**Calculus AB (AP)**

Hi, I have a calculus test tomorrow and I understand how to complete all of the problems, but I am unsure behind the reasoning of taking two derivatives. Can someone please explain the following: 1. g(x)=e^(f(x)) g'(x)=e^(f(x))f'(x) 2. f(x)=Integral from 0 to 3x of the square ...
*April 13, 2011 by Jake*

**calculus**

can someone please help me with these 3 questions: 1) Evaluate the limit. lim_(x->infinity) (ln(ln(4 x)))/(4 x) 2)Find y ' and y ". y= ln(5 x)/x^7 3)y =(arctan)(x - sqrt(1+x^2)) for this question i got y = -1/(2(1+x^2))which was wrong. Please and thank you!
*October 29, 2010 by clare*

**Calculus**

Verify that the volume of a cylinder of radius r and height h is given be the formula v= pi*r^2*h using cylindrical shell method.
*March 18, 2010 by drew*

**calculus-can someone please help me with this ques**

I have two questions if someone can PLEASE help. 1.solve the equation in the real number system. x^4+11x^3+24x^2-23x+35=0 **Please show work** 2.Use the remainder theorem to find the remainder. When f(x)is divided by x-3. Then use the factor theorem to determine whether x-3 is...
*December 30, 2012 by Jennifer*

**Calculus**

Can someone please tell me how to derive V=4/3pi(r)^3 to get x^2+y^2=r^2?
*March 23, 2008 by Jess*

**Pre calculus **

f(x)={ x+5, if x>0 3, if x<=0 Graph the function can someone please help
*July 4, 2011 by HELP*

**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*

**Calculus**

can someone please prove the difference rule to me? d/dx[f(x)-g(x)]=d/dx f(x)- d/dx g(x) plz help
*February 4, 2007 by Laura*

**Calculus**

int x^9*(sin(x^5)) Can someone please explain me how to do this integral?
*September 4, 2011 by Carole*

**Calculus**

int x^9*(sin(x^5)) Can someone please explain me how to do this integral?
*September 4, 2011 by Carole*

**math**

Solve 4a2 + 25 = 20a by factoring. Verify your solution Solve and verify the following equation: 13x2 + 35x + 21 = 12x2 25x 15
*December 28, 2012 by Lisa*

**Algebra**

Can someone verify if my answers are correct? Solve. 1/x+6-1/x-6 My answer is: -12/x^2-36 Solve. 1/x+5+2=5/x+5 My answer is: -3 Subtract. Express your answer in simplest form. 13x/30-4x/15 My answer is: x/6 Can someone verify if my answers are correct? Solve. 1/x+6-1/x-6 My ...
*July 12, 2007 by Need Help*

**Algebra2 Verify Identity**

Verify the Identity: csc(x)+sec(x)/sin(x)+cos(x)=cot(x)+tan(x) the left side of the equation is all one term.
*June 2, 2010 by wruck*

**calculus--please helpp**

if the line 3x-4y=0 is tangent in hte first quadrant to the curve y=x^3+k, find k. all i know is that its related to finding a derivative and i m basically completely lost....can please someone provide me some help?????
*October 14, 2011 by krishna*

**Chemistry**

Rank the following three elements in order of increasing Young'sModulus: Ge, Sn, Si. My answer is as follows: Sn<Ge<Si. I am not sure if this correct. Can someone verify. Thanks.
*December 20, 2013 by Hil*

**Pre Calculus**

Verify the following identity 2 tan x/1+tan^2 x = sin 2x
*April 12, 2010 by Joe*

**adult education**

I need help with someone to go over my eassy with me can someone please help me.This is my first time using this site so I don't know how it really works SOMEONE PLEASE HELP ME!!
*October 27, 2010 by jennifer*

**calculus**

verify the following identity cos(x+y) + cos(x-y)=2cosxcosy
*April 22, 2011 by Carol*

**English**

To look with admiration at someone or something is to ______ but to look at something very closely is to _____. If we seek to verify something, we are seeking to find out if what we heard _____. If you doubt someone's veracity, you doubt that he or she is ________
*April 5, 2014 by Anonymous*

**URGENT! Last calculus question!**

Hey! So, I was wondering if someone could answer this. I am mad studying for my exam and I still have a few questions left that I just don't have time to answer, and the assignment is due tomorrow. Thanks and here is the question: Use calculus and algebraic methods to do a ...
*July 29, 2008 by Derek*

**calculus-can someone please help me with this ques**

Given the following polynomial, find a. the zerros and the multiplicity of each b. where the graph crosses or touches the x-axis c. number of turning points d. end behavior f(x)=(x-1)(x-5) **please show work**
*December 17, 2012 by confused--Please help!!!!*

**calculus**

Can someone please help me find the arc length of this curve? x = 3y^(4/3) - 3/32y^(2/3) y is between -64 and 64
*September 6, 2010 by Pegs*

**Calculus**

Can someone please tell me how to find the following integral? cos^4(2q)*sin(2q) dq
*September 3, 2011 by Cad*

**Calculus:Help!**

Verify using an example that a + ( b c) = (a b ) +c ? Explain your reasoning. I have been over this a thousand times and I don't understand (the notes I was given online are incorrect so I don't know how to answer this). THANKS!
*July 3, 2008 by Derek*

**Calculus**

Verify the identity. (Left side to right side) {(sinu+sinv)/(cosu+cosv)}=tan1/2(u+v)
*May 2, 2012 by DAS*

**calculus-can someone please help me with this ques**

Given the following polynomial f(x)=(x-1)(x-5), find A.the zeros and the multiplicity of each one b. where the graph crosses or touches the x-axis c.the number of turning points d. the end behavior Please show work.
*December 17, 2012 by Ladybug--Please help!!!!*

**pre cal**

can someone please show me how to verify this identity? (sec x/csc x minus cot x) minus (sec x/csc x + cot x)= 2 csc x
*May 12, 2011 by Vania*

**Pre-Calculus**

How would you prove/Verify this Identity. x=theta (cosx+sinx-sin^3x)/(sinx)=cotx+cos^2x
*May 10, 2012 by Beatrice*

**Calculus :)**

For the function f(x)=1/(x+1), verify f(x) is one-to-one, then calculate f^-1 (1/4) and (f^-1)' (1/4)
*August 24, 2011 by Brit*

**Practice Exam Calculus**

f(x) = 6sqrt{x}- 9x n the interval [1,9]. f(c)=f(9)-f(1)/9-(1)=? Verify that the conclusion of the Mean Value Theorem holds by computing Now find,c in (1, 9) so that f'(c) equals the answer you just found. c=?
*October 22, 2013 by Sara*

**calculus**

f(x)=(9x^28)^6(4x^25)^11 Find f'(x) I got (9x^2-8)^6 *11(4x^2-3)^10*8x+((4x^2-3)^11)6(9x^2-8)^5(18x) but im doing something wrong can someone check my work please
*April 30, 2008 by John*

**Calculus**

Find the equation of the tangent to the curve x^2+y^2=25 at (-3,4). I'm really confused on how to get the answer, someone please help
*October 19, 2011 by Michael*

**calculus quick question**

g(x)= sqrt(1-4x^2) Can someone help me find the first and second derivatives please!
*December 2, 2012 by dt*

**pre calculus**

find the average rate of change of f(x)=x^3-5x+3: a. from -6 to -3 b. from -1 to 2 c. from 2 to 8 I am so lost, can someone please show me how to do this?
*March 27, 2013 by courtney*

**college**

I don't get how to do this question, please help!! verify that r(r (x ) = r^-1(x ) if r( x) = 2x-7 / 4x-6
*June 7, 2009 by Sam*

**Calculus - Verification**

Hello, I just wanted to verify this definite integral and if my answer is good: a = 1 and b = 4 integral of (1 - 1/x^2)(x^2 + 1/x) dx = (x + 1/x)(x^3/3 + lnx) + C (4 + 1/4)(64/3 + ln4) - (1 + 1)(1/3 + ln1) = 96.56 - 0.6666 = 95.89 THank you
*August 7, 2012 by Paul*

**calculus**

the equation cosx=x has a solution in what interval?...the answer is given as [0,pi/2] can someone please explain why?? thnks
*November 13, 2008 by sylvia*

**Calculus**

Would someone please tell me how to solve these two problems? Find the indefinite integral: x(x-1)^5 dx (v^2)(1-v)^6 dv
*November 18, 2009 by Richard*

**calculus-can someone please help me with this ques**

Find all zeros of the following polynomial. Write the polynomial in factored form. f(x)=x^3-3x^2+16x-48 I put: x^2(x-3)+16(x=3) (x-3)(x^2+16) For zeros: x-3=0 x=0 **My teacher stated check the equation solution again. What is the value for x and hence what is the zero for the ...
*December 27, 2012 by allison--Please help!!*

**vector calculus **

(a)Find the work done by the field F= yi+zj+xk in travelling around the curve X^2+y^2=4, z=0. (b) state stokes theorem and verify it for the field F given in (a), over the disc x^2+y^2<4, z=0
*August 5, 2011 by forest*

**Calculus Graph help!!!**

I need help with a calulus graph and figuring out its equation but it wont let me post the picture of the graphs here. so will someone who understands Calculus and their graphs super well please email me k m k underscore horse lover at hot mail dot com. no spaces and an actual...
*May 2, 2012 by kelsey*

**pre calculus**

a gun with a muzzle velocity of 1200 feet per second is fired at an angle of 6 degrees above the horizontal. find the component form of a vector. verify the magnitude
*May 5, 2014 by brittany*

**Calculus **

I seriously do not understand anything about this problem Please help. The equation of an ellipse centered at the origin is (x^2/a^2) + (y^2/b^2)=1 The area of the upper half of the ellipse can be determined by finding the area between the ellipse and the x-axis (y=O). The ...
*November 8, 2011 by Angel*

**Calculus**

Use the quotient rule to find f'(x): f(x) = [(x+4)(x-5)]/[2x(x+3)] For the first part...do I put them together? Can someone please complete this.
*May 28, 2008 by Sam*

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