Thursday

October 27, 2016
Number of results: 41,009

**Calculus PLEASE check my work ,**

1.) which of the following represents dy/dx when y=e^-2x Sec(3x)? A.3e^-2x sec(3x) tan (3x)-2e^-2x Sec(3x)<<<< my choice B.)3e^-2x sec(3x)tan (3x)-2xe^-2x sec(3x) C.)3e^-2x sec(3x)tan (x)-2e^-2x Sec(3x) D.)3e^-2x sec(3x)tan (x)-2xe^-2x sec(3x) 2.)calculate dy/dx if...

*March 12, 2011 by anon*

**parallell and perpendicular lines**

please check my homework given P(7,2) and the line y + 3x=7 find the equation for the line parallel line: y+3x+7 y=-3(x-7) +7 y-2=-3x+21+7 y=-3x+28+2 y=-3x+30 perpendicular line: y-2=1/3(x-7) +7 y-2=1/3x-7/3 +21/3 y-2==1/3x + 14 y=1/3x + 14 +2 y=1/3x +16

*February 19, 2012 by luckybee*

**math**

Dave is going to leave academia and go into business building grain silos. A grain silo is a cylinder with a hemispherical top, used to store grain for farm animals. Here is a 3D view, a cross-section, and the top view. If Dave is standing next to a silo of cross-sectional ...

*April 13, 2014 by hyun *

**PreCalculus**

Ok I know that the slope of a straight line is the same thing as x with a dot aboce it or simply the first derivative of x on the unit circle tangent gives you the slope of the reference line right? This can be expressed using the notation expressed above but how? Thanks!

*December 1, 2009 by Joe *

**Physics**

Hello everyone, I have made measurements of the periods of a pendulum attached to a stationary point at a certain height h. When plotting the periods as a function of the square root of the length minus the height it gives us a straight line. I now need to prove that this line...

*January 7, 2013 by Tom*

**calculus**

the point (1,9) lies on the graph of an equation y=f(x) for which dy/dx=4x(sqrt(y)) where x is greater than or equal to 0 and y is greater than or equal to 0 a)6 b)4 c)2 d)sqrt(2) e)0

*February 20, 2012 by victoria*

**algebra 2**

Not sure if either one of these answer are correct to simplify the sqrt for 24 1) 24 = 6 x 4 square root of 24 = square root of 6 x 4 2 root 6 2) sq root 24 = sq root (4x6)= sqrt 4 x sqrt 6= 2sq root 6=4.89898 3) Square root of 24 =sqrt (24) =sqrt(4*6) =2sqrt(6) = 2*square ...

*April 27, 2011 by plese help me*

**Calculus**

So here is the question: Find and equation of the tangent line to the graph: 4)f(x)=e^(2x) passing through the point (0,0) I find derivative being f'(x) =2e^(2x) Then m = f'(0) = 2 put into point slope formula: (y-y1)=m(x-x1) y-0 = 2(x-0) which comes out to y=2x 0=2x ; so the ...

*October 5, 2014 by Tom*

**Math**

The graph of the equation y=4-x consists of all the points in the coordinate plane that satisfy the equation. List 5 points that satisfy y= 4-x. Also, what do you think is the minimum number of points you need to plot in order to draw the graph of y=4-x. Please explain Set y=0...

*November 21, 2006 by victoria*

**Calculus**

a)The curve with equation: 2y^3 + y^2 - y^5 = x^4 - 2x^3 + x^2 has been linked to a bouncing wagon. Use a computer algebra system to graph this curve and discover why. b)At how many points does this curve have horizontal tangent lines? Find the x-coordinates of these points. I...

*October 31, 2010 by Chelsea*

**Math (Reflection across y=x line)**

Here's a question that I am having trouble with: What is the resulting equation when y=x^3+2x^2 is reflected across the y=x line? I know that I need to switch the y with the x's in the equation, so is the answer they're looking for simply x=y^3+2y^2 or do I need to simplify ...

*April 5, 2011 by Randy*

**maths**

What would the equation be of a straight line that passes through the points (1,1) and (3,3) ?? write the equation for the line: y= mx+ b put the first set of points in.. 1=1m + b then the second equation 3=3m + b subtract the equations... 2=2m so you know m. Put that into ...

*June 9, 2007 by kat*

**Physics**

A mass m is hanging on a string that passes over a pulley and is then attached to another mass 3m that is resting on a horizontal table (along with the pulley). Neglect friction. Mass m is held montionless and is then released. When it has fallen a distance h, it will have a ...

*January 12, 2010 by Bob*

**Calculus**

2sin(2theta) + sqrt(3) = 0 interval (0,2pi) How do I solve this? I thought about maybe subtracting the sqrt(3) from both sides, so that i would have 2sin(2theta) = -sqrt(3) Then maybe dividing by two? sin(2theta) = -sqrt(3)/2 Am I doing anything right here? It's been a long ...

*September 20, 2011 by Hannah*

**MAT221**

consider the line 8x-5y=-4 find the equation of the line that is perpendicular to this line and passes through the point (-4,-4) find the equation of the line that is parallel to this line and passes through the point (-4, -4) i keep getting different answers on the ...

*June 29, 2014 by Kia*

**Physics**

An umbrella with a diameter of 1 m turns 22 rev every 44 seconds. If it's 1.5 m from the ground, calculate the time it takes for a drop to reach the ground and the distance away from the umbrella a person should stand so as to not get wet. For this problem I made a = (0, -g) ...

*November 9, 2012 by Leslie*

**Math-Geometry**

I'm having trouble with these two questions about slopes and equation of a line: (A)-Find the slope of each segment (B)-Write an equation of the line that is determined by each pair of points 1. (0,0) and (6,-4) 2. (-3,2) and (7,-4) Thank you!

*February 20, 2010 by Sammi*

**AP CALC **

The function g is given by the formula g(x)= ∫[0,x/2] e^(-t^2)dt. An equation for the tangent line to the graph of g at the point x=1 is a) y-0.461=0.779(x-1) b) y-0.461=0.389(x-1) c) y-0.461=1.558(x-1) d) y-0.461=0.184(x-1) e) y-0.461=0.368(x-1) I took the derivative ...

*February 22, 2015 by Rachel *

**math**

Find the distance between (3, 2) and (1, 4). (1, 4) - (3, 2) = (1- -3, 4 - -2) = (1+3, 4+2) = (4,6) |(4,6)| = sqrt[4^2 + 6^2] = sqrt[52] = 2 sqrt[13]

*July 8, 2007 by steph*

**Math**

Simplify the expressions. 1. sqrt(40/169) 2. sqrt(18/13) 3. sqrt(45/32)

*October 21, 2008 by Kiley*

**Math**

Solve: sqrt(7x-5)+sqrt(15x+4)=sqrt(30x+31)

*October 27, 2008 by Shawn*

**Math**

Solve: sqrt(7x-5)+sqrt(15x+4)=sqrt(30x+31)

*October 27, 2008 by Chris*

**Math**

Simplify - sqrt 12b^2 * 2 sqrt 8b. I got -8 sqrt 6

*May 12, 2009 by Angie*

**Calculus**

Differentiate the given function. f(t)= 4(sqrt(t^3)) + 14/sqrt(t) - sqrt(17) f'(t)=?

*February 11, 2010 by Kassie*

**college 209**

multiply (2 sqrt 7 -5 sqrt 3)(8 sqrt7-5 sqrt 3)

*January 16, 2011 by Anonymous*

**Class 12th : Calculus**

If y = sqrt(x-1)+sqrt(x+1),prove that sqrt(x^2-1)dy/dx=1y/2

*June 9, 2011 by Akash*

**math**

find the eq to the tangent line to the curve y=x^3 g(x) at x=1 if g(1)=2 f(1)=3 f'(1)=1 g'(1)=-2 i cant understand how the answer is y=4x-2

*May 15, 2008 by sam*

**Samuel**

Near x=0, the tangent line approximation gives e^(−3x)

*March 1, 2010 by Nathan*

**Math**

Determine the slope of the tangent line to the curve y=2x^3-3x^2+1 at the point (1,0)

*June 30, 2010 by Eileen*

**Calculus**

Determine the slope of the tangent line to the curve y=2x^3-3x^2+1 at the point (1,0)

*July 15, 2010 by Eileen*

**Math**

Determine the slope of the tangent line to the curve y=2x^3-3x^2+1 at the point (1,0)

*July 15, 2010 by Eileen*

**math**

At what values of x does the function f(x)= x(x-4)^4 have a horizontal tangent line?

*December 2, 2010 by Keith*

**calculus**

At what values of x does the function f(x)= x(x-4)^4 have a horizontal tangent line?

*December 2, 2010 by Keith*

**Implicit Differentation**

Find the slope of the tangent line to the curve at (2,1). x/y +x^2y^2=6

*December 2, 2010 by Michael *

**Calculus**

Find the slope of the tangent line to the ellipse (x^2)/4 + (y^2)/9 = 1 at the point (x,y)

*February 23, 2011 by Lisa*

**Math Calc**

Find the tangent line to the curve (y-x)^2= 2y+4 at the point (2,6)

*August 18, 2011 by Lalee*

**Calculus**

If the tangent line to y = f(x) at (4, 3) passes through the point (0, 2), find f(4) and f'(4).

*October 18, 2011 by Jake*

**Calculus**

If the tangent line to y = f(x) at (4, 3) passes through the point (0, 2), find f(4) and f'(4).

*October 18, 2011 by Jake*

**CALC**

Find the tangent line to the ellipse defined by 3x^2 + 5y^2 = 17 at the point (-2, 1).

*December 28, 2011 by TIFFANY *

**calculus**

find the slope of the tangent line at the point P(1,1) on the graph of e^x-y=2x^2-y^2

*January 17, 2012 by becca*

**calculus**

Let f(x)=(x^2)+x+14. What is the value of f(x) for which the tangent line to the graph of y=f(x) is parallel to the x-axis?

*January 26, 2012 by tom*

**math**

find tangent line to the circle x^2 + y^2=100 at point (-6,8)

*February 5, 2012 by Declan*

**Calculus**

what is the slope of the line tangent to the curve (/x)^2 at point (4,16) * (/x)= the squareroot of x

*February 24, 2012 by Jesse Stone*

**calculus **

find the slope of the tangent line at the point (1,2) for the ellipse 2x^2+3y^2=14 y'(1) = ??

*April 13, 2012 by Mhd*

**Calculus grade 12**

find the slope of the tangent line to y^4 = 3x^2 - 2x at the point (1,1)

*June 21, 2012 by Albert*

**calc**

Find the slope of the tangent line to the graph y = x-3 at the point (0.5, 8)

*December 9, 2012 by Meera*

**Math (Help please)**

Find the points on y=(-x^2+4x-3)^3 that has a horizontal tangent line.

*January 16, 2013 by Aa*

**Maths (Tangents and Normals)**

curve y = (x^2) - 4x + 5 is tangent perpendiculat to the (line = 2y + x - 7 = 0)

*January 16, 2014 by Sykox*

**Calculus**

Find the slope of the tangent line to the ellipse x^2/4 + y^2/16= 1 at the point (x,y)

*March 23, 2014 by Rowhan *

**Calculus I**

For what values of a and b is the line -4x+y=b tangent to the curve y=ax^3 when x=4? Can anyone give me the hint?

*April 19, 2016 by Anonymous*

**maths**

which solution is the correct for this equation 4x^3 - 3x = 15 -1.8, -1.7, -1.6, -1.5, 1.5, 1.6, 1.7, 1.8 ?? What is your thinking, and why? Have you considered graphing y= 4x^3 -3x -15 ? Kat, what level of study are you at. This is an equation which can be "solved" only by ...

*May 13, 2007 by kat*

**geometry**

What is an equation of the line that passes through (-3,6)and is parallel to the line with the given equation: y=-x-5

*October 28, 2010 by noah*

**Math**

Write an equation of the line with y-intercept 4 that is parallel to the line whose equation is y=3x+2

*February 29, 2012 by amy*

**algebra**

If a line L1 has equation y = mx + b, where m and b are constants with m 0,then an equation of a line L2 perpendicular to L1 has the form , where C is a constant.

*September 5, 2013 by Milly*

**UNISA**

The equation of a line L1 is 2y-5x-1=0. Line L2 is parallel to L1 and passes through (2,1/4). What is the equation of L2, please? help me.

*May 23, 2016 by khanyee*

**Algebra**

First the slope. Perpendicular to a slope of -3 means a line slope of 1/3 y= 1/3 x + b. Now put in the x,y point and solve for b. write the equation of a line that has a y intercept (0,5) and is perpendicular to the line with equation y=-3x+1

*March 11, 2007 by bobpursley*

**Algebra**

Write the equation of the line satisfiying the givrn geometric conditions. L has y-intercept (0, 2) and is perpendicular to the line with equation 2x-3y=6 Here is my answer please check. -2/3x-2 I can see it is wrong just by looking at the slope. The perpendicular line has a ...

*April 25, 2007 by jessica*

**ALG 2!!!**

Write an equation of a line with an undefined slope and passing through the point (-2,4). Hint: To answer this question, consider the type of line that has an undefined slope. Then write an equation of that line using the values in the ordered pair.

*November 22, 2012 by tyneisha*

**Math**

If line f is parallel to the line h, and line f has y-intercept 5, what is the equation of line f ?

*January 24, 2011 by rolando*

**Calculus 12th grade (double check my work please) **

1.) which of the following represents dy/dx when y=e^-2x Sec(3x)? A.3e^-2x sec(3x) tan (3x)-2e^-2x Sec(3x)<<<< my choice B.)3e^-2x sec(3x)tan (3x)-2xe^-2x sec(3x) C.)3e^-2x sec(3x)tan (x)-2e^-2x Sec(3x) D.)3e^-2x sec(3x)tan (x)-2xe^-2x sec(3x) 2.)calculate dy/dx if...

*March 7, 2011 by anon*

**MATH**

I had an assignment containing 45 problems, and I am unsure of 4, can you check and see if the answers are correct? 1. Write an equation of the line containing the given point and parallel line (5,-1), 3x-7y=9 My answer was: y=3/7x-22/7 2. Find the equation of the line having ...

*December 6, 2009 by sarah*

**Math**

I had an assignment containing 45 problems, and I am unsure of 4, can you check and see if the answers are correct? 1. Write an equation of the line containing the given point and parallel line (5,-1), 3x-7y=9 My answer was: y=3/7x-22/7 2. Find the equation of the line having ...

*December 6, 2009 by S*

**Math**

I had an assignment containing 45 problems, and I am unsure of 4, can you check and see if the answers are correct? 1. Write an equation of the line containing the given point and parallel line (5,-1), 3x-7y=9 My answer was: y=3/7x-22/7 2. Find the equation of the line having ...

*December 6, 2009 by S:Please, I just need a check*

**radical expression**

What is the radical expression of 1. (11)^-3/2 2. 2^(-1.5) Thanks I will do one. the exponent 3/2 means sqrt of something cubed. So (11)^-3/2 = 1/(11)^ 3/2 =1/ sqrt 11^3 = 1/ sqrt (11^2 * 11)= 1/ (11 sqrt 11)

*January 26, 2007 by Jen*

**Geometry - Circles and tangents**

Two circles of radius 1 are externally tangent at Q . Let PQ and QR be diameters of the two circles. From P a tangent is drawn to the circle with diameter QR , and from R a parallel tangent is drawn to the circle with diameter PQ . Find the distance between these two tangent ...

*March 21, 2013 by Knights*

**Math**

What's the slop of the line whose equation is 87 = 7 - 2y? This is similar to the other one where i posted. You subtract 7 from both sides so the equation will be 80= -2y. Then divide both sides by -2, and the equation will be y=-40. This is a straight line so the slope is ...

*November 5, 2006 by Cynthia*

**Calculus**

Find all values for c in the intercal (1,4) so that the slope of the tangent line at (c,f(c)) equals the slope of the secant line through (1,1/3) and (4,2/3) where f(x) = x/(x+2) 1 </ x </ 4 (<-- that is suppose to be the less than or equal to sign) I'm not sure how ...

*May 27, 2014 by Aria*

**calculus - what is the derivative?**

Let f(x) = 2x^2 + 1 a. Find the derivative f' of f. b. Find an equation ofthe tangent line to the curve at the point (1,3). c. Sketch the graph of f. *Can someone please help me? I have been trying to do my homework for some time now and I am stuck on this problem. I do not ...

*September 21, 2008 by B :)*

**graphing**

Q: How could the function y=3t^2 +4 be plotted on a cartesian graph to produce a straight line? What would be the numerical values of the slope and the intercept of the line? For this it's explained in the lab book for physics as if the function is y=mx+b it would be a ...

*September 2, 2007 by ~christina~*

**math**

Find the product and enter the real and imaginary parts below. Note that you do not need to type in the since it is already given to you. Simplify your square roots as much as possible. sqrt-27((sqrt-5)-(sqrt-11))

*September 13, 2011 by john*

**Calculus**

Hello all, I would like some confirmation on a limits question. The limit is as h --> 0, [sqrt [73-5(x+h)] - sqrt (73-5x)]/h I multiplied by the conjugate of the numerator and reduced everything down to this final answer: [(-5)sqrt(73-5x)]/2 Is this correct?

*September 13, 2016 by Tim*

**algebra**

Which choice is the equation of a line that passes through point (7, 3) and is parallel to the line represented by this equation? y = 2/7x - 3 A. 7x + 3y = 2 B. y = 2/7x + 1 C. y = -7/2x -3 D. 2x + 7y = 1 i would assume that the answer to this would be B, as they both have the...

*November 10, 2013 by caduceus*

**Calc.**

Evaluate the indefinite integral. Please check my work? Not sure if I am doing this correctly. S= integral symbol S x^3*sqrt(x^2 + 1) dx u = x^2+1 x^2= u - 1 du = 2xdx du/2 = xdx 1/2 S x^2 * x sqrt (x^2 + 1) du 1/2 S (u - 1) * sqrt (u) du multiply square root of u and (u - 1) ...

*January 27, 2011 by CMM*

**math**

(a)Given the points P(3,5),Q(8,10)and R(8,0),find the equation of a line which is perpendicular to QR and passes through the mid point of QR. (b)The line 2x+3y=2 and 7x-3y=10 intersect at A . Find the equation of the line which passes through A and is perpendicular to the line...

*June 5, 2013 by JOJO*

**math,correction**

is this correct: solve: 5(x-2)^2=3 My answer: (10 +/- sqrt 15)/(5) looks like you expanded, then used the formula and you got the right answer properly reduced. I think you are getting this!!! I don't want to confuse you but I would have done the following: (x-2)^2 = 3/5 x-2...

*April 19, 2007 by jasmine20*

**Algebra**

graph the equation x-3=y (where do I plot the points?) find the intercepts and then graph: 5x+4y=20 find the intercepts and then graph: 1.4x-1.3y=3.64 graph the equation using slope and y-intercept: y=10/7x +4 graph using slope and y-intercept: x+2y=8 graph by plotting points...

*July 18, 2010 by Jacquie*

**maths**

find the equation to the straight line which passes through the point of intersection of the line 3x+4y-1=0 and 5x+8y-3=0 and is perpendicular to the line 4x-2y+3=0

*January 10, 2013 by Anonymous*

**Physics, help!!**

How do I get the equation T=2pi(sqrt(m/k)) to the linear equation y=mx+b?

*February 4, 2013 by Hannah*

**homework check**

which if the following statements is false? a. The points of a circle are coplanar b. Concentric circles intersect in exactally one point c. In are AB C Denotes that an arc of the circle has endpoints A and C and that passes thru B d. If a line and a circle are coplanar and ...

*April 15, 2012 by Courtney*

**Geometry**

Write and equation of the line described A) the line parallel to y = 1\3x +5 and with a y-intercept of 1 B) the line perpendicular to y=-2x+4 and that passes though the point (-1,2)

*March 18, 2010 by Anonymous*

**math **

Find an equation of the line that (a) has the same y-intercept as the line y+2x-12=0 and (b) is parallel to the line 5x+12y=8 Write your answer in the form y=mx+b

*April 27, 2016 by anonymous*

**Math**

Use the point-slope form linear equation given to complete the following problems. y-3=3(x+1) 1. What is the slope of the given line? Here's what I did: y-3=3(x+1) y-3+3=3x+3 y=3x+6 m=3 Correct so far? 2. What point does this line pass through, which is the basis of this ...

*January 23, 2014 by Elizabeth*

**maths**

Choose the option that gives the solution of the initial-value problem dy dx=(1 + 2 cos2x^2)/y (y > 0), y= 1 when x = 0. Options A y = 1+ 2sin^2 x B y = (1 + 2 sin x)^2 C y = (4x + cos(2x))^2 D y = 4x + cos^2 x E y =sqrt(4x + cos(2x) F y =sqrt(1 + 4x + sin(2x)) G y =1/(sqrt...

*May 11, 2011 by albert*

**Calculus**

Find the slope of the tangent line to the graph of f at any given point f(x) = -2x + 6 at (2,2)

*December 18, 2007 by Kelly*

**math urgent!**

find the eq to the tangent line to the curve y=x^3 g(x) at x=1 if g(1)=2 f(1)=3 f'(1)=1 g'(1)=-2 i cant understand how the answer is y=4x-2

*May 15, 2008 by sam*

**calculus**

Show that the curve given below has no tangent line with slope m1, where: y = 4 x^3 + 8 x - 6 m1 = 7

*November 3, 2008 by BEN*

**12th grade calculus**

let f(x)=x^2 1. show that the line tangent to the graph of f at the point (1,1)is y=2x-1

*November 16, 2008 by dt*

**calculus**

find the point(s) on the graph of y = (2x4 + 1)(x - 5) where the tangent line slope is 1.

*June 16, 2009 by lana*

**calculus**

consider the function f(x)=2x^2 +1. its tangent line at x=2 goes through the points (2,y1) and (-1,y2) where y1=?, y2=?

*September 28, 2010 by Jenny*

**calculus**

consider the function f(x)=2x^2 +1. its tangent line at x=2 goes through the points (2,y1) and (-1,y2) where y1=?, y2=?

*September 28, 2010 by Jenny*

**calculus**

Find the equations for the lines tangent to the ellipse 4x^2+y^2=72 that are perpendicular to the line x+2y+3=0

*October 10, 2010 by Anonymous*

**math**

how do you show that line 3x+y-2=0 is a tangent of the curve y=(4x-3)(x-2) and how to find the point of contact??

*October 17, 2010 by Jack*

**Calculus Help **

Determine the point at which the graph of the function has a horizontal tangent line. f(x) = (9x^2)/(x^2+6)

*October 27, 2010 by Sam *

**Calculus**

let f(x)=x*e^x For what value of x is the slope of the line tangent to the graph of function f at [x,f(x)] equal to 1/2?

*February 3, 2011 by Anna*

**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*

**math**

Determine the points on the curve y=x^2(x^3-x)^2 where the tangent line is horizontal. Thx!

*March 20, 2011 by hast*

**math**

using limits...finding the tangent line of the square root of x when x=2

*September 22, 2011 by tiffany *

**Calculus**

Find all points on the curve where the tangent line is horizontal y = (x^6/6) - (x^2/2) + 1

*October 13, 2011 by Blue*

**calculus**

find equations of the tangent lines to the curve y=(x-48)/(x+48) that are parallel to the line y=6x+6

*October 30, 2011 by jihang*

**calculus**

given f(x)=(x). find the distance of the point P(2,5) from the line tangent to the functions at x=4.

*December 7, 2011 by mike*