Thursday

April 24, 2014

April 24, 2014

Number of results: 22,185

**Calculus**

Regard as the independent variable and as the dependent variable and find the slope of the tangent line to the curve (x^2 + y^2)^2 - 4x^2 y = 225 at the point (x,y) = (4,1) Thank you very much for helping me.
*Saturday, November 5, 2011 at 6:05pm by Jake UCD 11/5/11*

**Calculus**

Find the slope of the tangent line to the curve 2sin(x) + 6cos(y) - 6sin(x)cos(y) + x = 3pi at the point (3pi, 7pi/2) Thank you very much for your help.
*Saturday, November 5, 2011 at 6:08pm by Jake UCD 11/5/11*

**Pre calc**

Use the half-angle formulas to determine the exact values of the sine, cosine, and tangent of the angle. 67° 30' 7 sin(67° 30')= cos(67° 30')= 4 tan(67° 30')=
*Sunday, January 22, 2012 at 10:42pm by kyle*

**trig**

Write the expression as the sine, cosine, or tangent of a double angle. Then find the exact value of the expression. 2tan 2pi/3 / 1-tan^2 2pu/3
*Friday, June 21, 2013 at 12:26pm by tony*

**Factoring**

What does 3x^3-3x+2=0 come out to? How would I solve this? Is the x cubed supposed to be x squared? You can compare the equation with the identity: (a+b)^3 = a^3 + 3 a^2 b + 3 a b^2 + b^3 which you can rewrite as: (a + b)^3 = 3 ab (a + b) + a^3 + b^3 (1) The equation you want ...
*Wednesday, May 30, 2007 at 12:47am by Ace*

**math116**

I find from the first equation that x = 3y and plugging in to the second equation we get o.2y+37(-3y)=23 0.2y-111y=23 -110.8y=23 y=-23/110.8 x=69/110.8 need help to understand why the elimination process in not work in this linear equation?
*Tuesday, October 19, 2010 at 10:01pm by unknown*

**Calculus**

My teacher showed our class how to find the graph of a derivative using tangent lines. I can not figure this out. I would really appreciate it if someone could help me or explain it to me. Thank you very much for your help.
*Sunday, September 30, 2007 at 4:28pm by Jacob*

**maths**

The parabola y2 = 4ax, where a > 0, and the rectangular hyperbola xy = C2, where C > 0, intersect at right angles. Show that the tangent and normal to either curve at the point of intersection meet the x-axis at T and N where TN = 2pa, where p is an integer to be ...
*Wednesday, March 23, 2011 at 7:04am by lia*

**Computer Graphics**

Q. Determine the equation for a cubic spline segment passing through two end points A (0, 5) and B (10, 20), having a slope of 2 and a curvature of -0.5 at A. Equation for cubic spline is: y=a0+a1.x+a2.x^2+a3.x^3 Slope equation is:y’=dy/dx=a1+ 2a2.x+3a3.x^2 curvature equation ...
*Thursday, January 25, 2007 at 4:13pm by bineesh*

**Math**

Solve the system using any algebraic method. 2x - 2y + z = 3 5y - z = -31 x + 3y + 2z = -21 ______________________ The answer I got for this is ( -26, 6,67) but I know its wrong and I don't know why. Help please >< my work is at the bottom I used substitution method ...
*Tuesday, November 1, 2011 at 2:19am by Linda*

**math**

I need help with write the equation of the line which contains the point (0,negavtive 3), or written ars(0, -3) and whose slope is 4. if you want the equation in the form y = mx + b sub in -3 for y, 4 for m, and 0 for x for -3 = 4(0) + b so b = -3 equation: y = 4x -3 We could ...
*Friday, April 27, 2007 at 6:52pm by Don*

**calculus-differential equation**

Consider the differential equation: (du/dt)=-u^2(t^3-t) a) Find the general solution to the above differential equation. (Write the answer in a form such that its numerator is 1 and its integration constant is C). u=? b) Find the particular solution of the above differential ...
*Tuesday, February 5, 2008 at 5:19pm by Jeff*

**math,question**

okay i really don't understand this problem. It says: Prove the point-slope equation property which is : Point-slope equation(an nonvertical line with slope m and containing a point (X1,Y1) has the point-slope equation of y-y1=m(x-x1). Now show that any point (x2,y2) on the ...
*Thursday, January 25, 2007 at 4:28pm by Jasmine20*

**Calculus**

Suppose that ax^2 + bx + c is a quadratic polynomial and that the integration: Int 1/(ax^2 + bx + c) dx produces a function with neither a logarithmic or inverse tangent term. What does this tell you about the roots of the polynomial?
*Thursday, January 10, 2008 at 2:41pm by mathstudent*

**math**

How do I find the area of a circlr? In the problem I'm trying to solve, the only information that is given is that sides BC and AD of the 8 by 12 rectangle located outside of the circle, are tangent to the circle.
*Wednesday, October 15, 2008 at 5:45pm by Lauren*

**12th grade calculus**

find the lines that are tangent and normal to th ecurve at the point given 1. 2xy+piesiny=2pie (1, pie/2) 2. x^2cos^2y-siny=0 (0, pie)
*Sunday, October 19, 2008 at 9:06pm by elley*

**Pre-Cal**

1) use the half-angle formulas to determine the exact values of the sine, cosine, and tangent of the angle. 67 degrees and 30' Please explain!! I do not know how to start.
*Monday, March 1, 2010 at 3:56pm by Janet*

**Algebra**

Four circles with centers A,B,C,and D are mutually tangent. The areas of circles A,B,C, and D are 25pi, 100pi, 16pi, and 225pi respectively. How many units are in the perimeter of quadrilateral ABCD?
*Sunday, December 5, 2010 at 10:49pm by Tyler*

**calculus**

Consider the following. y = (2x2 + 5)(x3 − 25x) at (5, 0) (a) At the indicated point, find the slope of the tangent line. (b) Find the instantaneous rate of change of the function.
*Thursday, March 10, 2011 at 9:53pm by Adam Janky *

**Geometry**

Suppose that line t is tangent to circle center O and radius OP at point P and that secant l, which is parallel to t, intersects circle at the two points A and B. Prove chords AB and BP are congruent
*Thursday, April 21, 2011 at 5:08am by TM*

**calculus**

Suppose y is defined implicitly as a function of x by x^2+Axy^2+By^3=1 where A and B are constants to be determined. Given that this curve passes through the point (3,2) and that its tangent at this point has slope -1, find A and B.
*Wednesday, May 4, 2011 at 4:34pm by chelsea*

**calculus**

find all points on the curve x^2y^2+xy=2 where the slope of the tangent line is -1 I know that you have to find the derivative when it equals -1 i got y'=(2x*y^2-y)/(2x^2*y+x) (i don't know if it is correct or not) but i don't know how to go from here. any help would be good ...
*Tuesday, November 1, 2011 at 2:35pm by Fredrick E.*

**calculus**

find all points on the curve x^2y^2+xy=2 where the slope of the tangent line is -1 I know that you have to find the derivative when it equals -1 i got y'=(2x*y^2-y)/(2x^2*y+x) (i don't know if it is correct or not) but i don't know how to go from here. any help would be good ...
*Tuesday, November 1, 2011 at 2:35pm by Fredrick E.*

**Geometry Inscribed**

line BC is tangent to circle A at B and to circle D at C (not drawn to scale) AB=11, BC=23,and DC=2. find AD to the nearest tenth. Image: i.imgur(dot)com/f4ThxTu.jpg
*Saturday, March 9, 2013 at 4:00pm by Rose*

**check+ math!**

QUESTION: A horizontal translation is applied to the graph of y= X^ 3 + 2 so that it will pass through (3, 10) what is the new equation for the graph? y=(x+a) ^3+ 2 10= (3+ a) ^3 + 2 10-2= (3+ a) ^3 + 2-2 8= (3+ a) ^3 Take the cube root of each side... 2= 3-a solve for a So I ...
*Tuesday, August 29, 2006 at 12:42pm by kris*

**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 ...
*Sunday, November 5, 2006 at 3:50pm by Cynthia*

**algebra 2**

1) In the general second-degree equation Ax^2 + Bxy + Cy^2 + Dx + Ey = F = 0, what is the discriminant and what does it tell you about the graph of the equation? 2) Which terms in a general second-degree equation (Ax^2 + Bxy + Cy^2 + Dx + Ey = F = 0) are used to find the ...
*Sunday, July 10, 2011 at 3:33am by sandra*

**math**

The tangent from point T touches a circle at R.If the radius of the circle i 3cm and T is 5cm from the center of the circle.Calculate/TR/.
*Saturday, September 17, 2011 at 3:37pm by Raha *

**math**

find a function y=ax^2+bx+c whose graph has an x-intercept of 1, a y-intercept of -2, and a tangent line with slope -1 at the y-intercept.
*Saturday, October 9, 2010 at 11:48pm by Emily*

**Algebra**

Solve each literal equations for the indicated variable D = C - s/n ( for s) s/n = D - C Next, multiply both sides of the above equation by n, to get the equation for s. i dont understand could you type it how it looks This is an example Tammy If you have z/b = x + y and you ...
*Saturday, July 8, 2006 at 12:16am by Tammy Evert*

**Calculus**

Determine whether the curve has a tangent at the indicated point. f(x)= sin x 0<x<3pi/4 cos x 3pi/4<x<2pi at x = 3pi/4
*Tuesday, September 7, 2010 at 11:28pm by Hannah*

**Trig**

A curve with polar equation r=(8)/7sinx + 36cosx represents a line. This line has a Cartesian equation of the form y=mx+b ,where m and b are constants. Give the formula for y in terms of x . For example, if the line had equation y=2x+3 then the answer would be 2x+3 .
*Monday, December 13, 2010 at 11:13pm by Audrey*

**Geometry **

Given: 7x + 2 = 2 + 5x – 6 Prove: x = –3 Given the equation 7x + 2 = 2 + 5x – 6, use the commutative property to rearrange the terms so that like terms are next to one another. This gives the equation 7x + 2 = 2 – 6 + 5x. Then, use the ____________________ to group the like ...
*Tuesday, February 21, 2012 at 4:41pm by Anonymous*

**Math**

(2,14),(1,-1),(3,35) Find the quadratic function y=ax^2+bx+c 1) 4a+2b+c=14 2) a+b+c=-1 3) 9a+3b+c= 35 equation 1&2 = 3a + b = 13 equation 1&3 = -5a +5b = -21 i know you take those two equations now 3a + b = 13 -5a - 5b = -21 multiply the top by 5 and the bottom equation by 3 ...
*Tuesday, May 12, 2009 at 2:44pm by Sarah*

**chemistry**

Consider the following double displacement reactions. For each reaction, complete and balance the equation and give the net ionic equation. NH4Cl(aq)+Ca(NO3)2(aq) -> NH4(NO3)2+CaCl the second half of the equation is what I had done but I think its not right...
*Thursday, November 11, 2010 at 1:59pm by Riley*

**Physics**

A ball (mass = 250 g) on the end of an ideal string is moving in circular motion as a conical pendulum. The length L of the string is 1.92 m and the angle with the vertical is 37 degrees. A) What is the magnitude of the torque (N m) and direction (from the listed answers) of ...
*Saturday, November 13, 2010 at 4:55pm by Miki*

**chemistry**

The Rydberg equation (1/lambda=R/ni^2–R/nf^2) can be treated as a line equation. What is the value of nf as a function of the slope (m) and y-intercept(b)? by GC 1/lambda = R/ni^2–R/nf^2 y = mx + b (standard form) of a linear equation) x = (y-b)/m Let, y = 1/lambda m = -R x = ...
*Friday, January 15, 2010 at 2:16am by bubble*

**equation of the normal**

An equation of the normal to the graph of f(x) = x / (2x-3) at (1,f(1)) is ........ find f' Then, the slope of the normal will be -1/f' Make the equation g(x)= -1/f' + b put in the point 1, f(1), and solve for b, and you have it.
*Saturday, December 9, 2006 at 9:45am by Jen*

**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 ...
*Sunday, April 13, 2014 at 4:06am by hyun *

**chemistry**

If heat of reaction, Ca(s) + 2H+(aq) Ca2+(aq) + H2(g) , is - 544 kJ/mol, heat of reaction, CaO(s) + 2H+(aq) Ca2+(aq) + H2O(l) , is -192 kJ/mol. and heat of formation of water is -286, what is heat of CaO? Ca(s) etc is equation 1. CaO + 2H^+ etc is equation 2. H2 + 1/2 O2 ==>...
*Saturday, February 10, 2007 at 3:24pm by nicholas*

**Algebra**

I have some problems that I am having trouble with and I have some that need checking please. Thanks! Solve the equation. 4. (x+7/4)=2(x-1/6) Find all the value(s) of x that make thedenominator(s) zero. Then solve the equation. 6. (x-8/2x) +5= (x+6/x) Solve the equation. 7.(x/...
*Tuesday, August 21, 2007 at 12:16am by Soly*

**Graphing on Calculator**

An appliance manufacturer estimates that the profit y (in dolars) generated by producing x cooktops per month is given by the equation y= 10x + 0.5x^2 - 0.001x^3 - 5000 where 0 ¡Ü x ¡Ü 450. Graph the equation. I punched in the equation and I didn't get anything. I dont know ...
*Sunday, September 13, 2009 at 8:05pm by John*

**Physics**

a bicycle turned upside down whiles owner repairs a flat tire. A friend spins the other wheel, of radius R, and observed that drops of water fly off tangentially. She measures the height reached by drops vertically. A drop that breaks loose from the tire on one turn rises a ...
*Tuesday, October 19, 2010 at 4:10am by Anonymous*

**algebra**

could you please check this answer for me and correct. thanks given equation point slope form linear equation to use to do question. y-3 = 3(x+1) question rewrite this equation in standard form y- 3 + 3 = 3x - 3x +3 + 3 -3x+ y = 6 collect all variables on one side and ...
*Friday, January 20, 2012 at 9:24pm by ann*

**Find the sum of thuis question**

Can someone find the sum for this equation please. (X^2)/(X^2-16)=(5X+4)/(X^2-16) I don't think it is finding the sum, but I can simplify the equation. (X^2)/(X^2-16)=(5X+4)/(X^2-16) First, multiply both sides by X^-16. X^2 = 5X+4 Subtract 5X+4 from both sides. X^2-5X-4 = 0 ...
*Wednesday, May 23, 2007 at 10:54am by Mandy*

**Science (Chemistry)**

. Complete all the following for the reaction (NH4)2S + Cd(NO3)2 --> CdS(s) + NH4NO3 1. Balance this equation 2. Write the ionic equation 3. Write the net ionic equation
*Friday, March 14, 2014 at 10:00pm by Anonymous*

**PreAlgebra**

Identify in the following equation is quadratic or linear? y=10^3x According to what I understand this needs to be a quadratic equation, because it is in exponential form, and a linear equation does not use exponents am I right??
*Wednesday, November 18, 2009 at 10:47am by Learner*

**calculus**

1) equation; sum= (1-(1+i)^-n / i 2) equation; sum= r(1+i)^-1 + r(1+i) ^-2 + r(1+i)^3 +...+ r(1+i)^-(n-1) + r(1+i)^-n im suppose to simplify second equation into the first one but im messing up somewhere if anyone can tell me the first 3-4 steps i think i can get it from there...
*Thursday, January 31, 2013 at 10:21am by visoth*

**calculus**

Find an equation oif the line that contains the two points. Write the equation in the general form Ax+By+C=0. (-5,4)and(2,-5) Can anyone please teach me how to do this??? I got no idea with writing the equation in the general form.
*Wednesday, September 3, 2008 at 9:17pm by Kumiko*

**Pre-algebra**

Hi need help answering this question? In your own words, define the term equation and then explain what it means to solve an equation. Give an example of an equation and its solution. Explain why it is the solution.
*Saturday, May 21, 2011 at 1:01pm by clarissa*

**Chemistry**

When the following solutions are mixed together, FeSO4 (aq) + Csl (aq): What precipitate if any will form, Write the balanced equation, write the complete ionic equation and wriye the net ionic equation?
*Friday, April 13, 2012 at 9:16pm by Ann*

**Calculus**

Use the four-step process to find the slope of the tangent line to the graph of the given function at any point. f(x) = 16 - 10 x Step 2: f(x + h) - f(x) = Step 4: f'(x) = lim(h->0)(f(x + h)- f(x))/h =
*Friday, June 7, 2013 at 9:19pm by Shan*

**FINANCE/MATH**

Please use both M&M proposition II with taxes equation and WACC equation to derive the following equation:? WACC = Ru X [1- Tc(D/V)]? I need this by tomorrow please help.
*Wednesday, December 8, 2010 at 12:32am by Anonymous*

**Calculus.**

Given the function f with the restricted domain, find the points at which the tangent line is horizontal. f(x)=2sec(x)-tan(x) Domain: [-pi/2,pi/2] * I got (pi/6, square root of 3), but I am not sure if that is right, or if there is another point.
*Sunday, March 27, 2011 at 9:37pm by Ashley*

**Calculus**

Find the linear approximation of the function f(x)=^3sqrt(1+3x) at a=0 and use it to approximate ^3sqrt(1.03)Is this an overestimate or underestimate of the actual value? Explain your answer in terms of the tangent line and the curve.
*Thursday, April 11, 2013 at 12:34pm by Anonymous*

**Quadratic -Make up a problem**

I am supposed to write a quadratic equation in the varible x having the given numbers as solutions. Type the equation in standard ax^2+bx+c=0 my solution is 1, only one solution. The equation is __________=0?
*Saturday, February 9, 2008 at 11:00am by Marysvoice*

**chemistry**

Phosphoric acid and barium hydroxide solutions mix to form water and solid barium phosphate. Write the word equation, skeletal equation, and the balanced equation for this word problem.
*Wednesday, March 3, 2010 at 9:20pm by Joe*

**math**

State the solutions, or estimated solutions, to each quadratick equation. We have equation is x^2-9x+20.25=0 and the graph is y=x^2-9x+20.25 Not sure how to figure this one out. I assume I just solve the equation and not the graph to get the ordered pairs?
*Wednesday, January 12, 2011 at 11:32am by m*

**maths**

write the equation in slope-intercept form. then graph the equation. 1. 6x-4y=3 2. 2y+5x=10 can you please help me with at least one of them? thanks! also, where it says 'then graph the equation', I know we can't graph here, so you can ignore that. but if you know any other ...
*Saturday, October 3, 2009 at 5:05pm by regina*

**Coordinate Geometry: Ms.Sue or someone please help**

Hi! Can you please help me with this problem/proof? I'm not sure how to approach it. Thanks! Prove that a line perpendicular to a radius at the point where the radius meets the circle is tangent to the circle. Use coordinate geometry.Hi! Can you please help me with this ...
*Monday, October 28, 2013 at 5:55pm by Anonymous*

**Coordinate Geometry: Ms.Sue or someone please help**

Hi! Can you please help me with this problem/proof? I'm not sure how to approach it. Thanks! Prove that a line perpendicular to a radius at the point where the radius meets the circle is tangent to the circle. Use coordinate geometry.Hi! Can you please help me with this ...
*Monday, October 28, 2013 at 6:33pm by Anonymous*

**math (please help)**

1. Write the equation for the horizontal line that contains point G(-8, 8). 2. What is an equation for the line that passes through points (-1, -4) and (1, 4)? Write the equation in slope-intersect form. 3. Write an equation for the vertical line that contains point E(10, -3).
*Thursday, October 31, 2013 at 11:38am by kaitlyn*

**maths**

Show that the equation (1) divided by (x+1) - (x)divided by (x-2)=0 has no real roots Well, to begin, start with 1/(x+1-x). The x's cancel out because they are opposite signs, so now you have 1/1, or just 1. Then, you are dividing 1 by (x-2). In order for an expression to have...
*Sunday, January 28, 2007 at 5:45am by rochelle*

**chem**

λ for one line of the hydrogen spectrum is .4118 x 10-4 cm. Use this value in the Rydberg equation to calculate the RH value using n1 = 2, and n2 = 5. change the line spectrum to meters you know the equation is Et= Ef-Ei (i think is the equation they want you to use, i ...
*Monday, October 2, 2006 at 8:12pm by Mary*

**math/Check!**

okay so the question is as follows: determien the standard form of the equation of a hyperbola with vertices(+or- 2,0) and passing through (4,3) is this right? x^2/2^2 - y^2/b^2 =1 Since P(4,3) passes through, the x and y coordinates satisfy the equation: 4^2/2^2 - 3^2/b^2 =1 ...
*Tuesday, December 5, 2006 at 3:51pm by sammy boy!*

**math/check!**

okay so the question is as follows: determien the standard form of the equation of a hyperbola with vertices(+or- 2,0) and passing through (4,3) is this right? x^2/2^2 - y^2/b^2 =1 Since P(4,3) passes through, the x and y coordinates satisfy the equation: 4^2/2^2 - 3^2/b^2 =1 ...
*Tuesday, December 5, 2006 at 6:27pm by sammy boy!*

**maths**

find the roots of the equation X(square)+7x equal to 0.(b)write down the equation whose roots are -2 and 5. I will be happy to critique your thinking. Write the equation, and solve. In teh second, hint: (x+2) is one factor.
*Wednesday, June 6, 2007 at 8:38am by nikita*

**ap algebra**

Please help me with this problem. I dont know what to do. Use the graph or table to determine a solution of the equation. Use synthetic division to verify that this number is a solution of the equation. Then solve the polynomial equation. x3 + 6x2 + 11x + 6 = 0
*Monday, October 15, 2007 at 5:51pm by Kate*

**Algebra 2**

Let (x1,y1) be a solution, other than (0,0), of a direct variation equation. Write an second direct variation equation whosegraph is perpindicular to the graph of the first equation.
*Tuesday, October 12, 2010 at 7:58pm by Bob*

**add maths**

Given that the quadratic equation is (2m+3)x^2+(4m-2)x-(m+1)=0.Find the value of m,if •one of the root of the equation is negative •one of the root of the equation is reciprocal of the other
*Sunday, February 2, 2014 at 9:22pm by mandy*

**Algebra**

Thank you Christina.. I am taking Algebra online...something I would never recommend....How would I write the equation of the line passing through (6,37) and (1,12)? the most common way is to use y=mx + b where m is the slope and b is the y-intercept so the first thing you ...
*Friday, July 27, 2007 at 3:11pm by Misty*

**ALGEBRA**

Bill is solving the equation 26x−21(6x+51)=40(11x+139). The following shows the steps he has used so far to solve the equation. Step1:26x−21(6x)−21(51)=40(11x)+40(139) Step2:26x−126x−1071=440x+5560 Which statement describes a possible next step ...
*Wednesday, November 13, 2013 at 6:34pm by c2v5*

**Calculus**

Follow the steps below for the given function. (Do not use mixed numbers in your answers.) 2x + 5y = 1 Solve the equation for y. y = Differentiate this equation with respect to x. y ' = Complete the steps below to implicitly take the derivative of the original equation. 2x + ...
*Thursday, June 13, 2013 at 10:03pm by Ant*

**Maths - Properties of Planes**

write a scalar equation, given it's vector equation. [x,y,z]= [3,7,-5] + s[1,2,-1] + t[5,-2,3] ( I remember my teacher saying that you have to cross s and t, and that will be my normal and thereafter I substitue the point to find the 'D' value of teh scalar equation, but when ...
*Tuesday, August 24, 2010 at 11:01am by Shaila*

**Math**

I need help with two problems. Just want to make sure that the answers I put are correct. 1) Which of the following is an equation of a vertical line? F. 4x + 5y = 0 G. -4 = 16x H. 3y = -9 I. 4x + 5y = -1 2) Which equation is the equation of a line that passes through (-10, 3...
*Tuesday, February 15, 2011 at 6:08pm by Melanie*

**Trig**

There is a right triangle with a left side of six, a bottom side of 10, and a hypoteneuse 11.66. How do you find the other two angles? I tried the inverse of tangent 6/11.66, but my calculator said that's invalid. What do you properly do?
*Thursday, December 17, 2009 at 5:41pm by Sam*

**Calculus Need of Urgent Assistance**

Let f(x) = x3 − 7x2. Find the point(s) on the graph of f where the tangent line is horizontal. (x, y) = I already got the smaller value, but I'm not getting the larger value right
*Friday, February 11, 2011 at 12:57pm by Anonymous*

**physics**

A patialy moves along half the circumference of a circle of 1 meter radius. Calculate the work done if the force at any point inclined at 60o to the tangent at that point has 5 New tones magnitude
*Tuesday, July 10, 2012 at 2:41am by sunil*

**calculus**

Find the x-coordinates of all points on the curve f(x) = sin 2x − 2 sin x at which the tangent line is horizontal. (Enter your answers as a comma-separated list. Use n to represent any integer.)
*Sunday, September 23, 2012 at 2:19am by Anonymous*

**calculus (derivativs)**

Find the points on the graph of f where the tangent line is horizontal. original: x/x^2+25) After I did the quotient rule I got: (x^2+25)(1)-(x)(2x)/((x^2+25))^2 Then of course I know you set that equal to 0, but I do not know how to set it up or "finalize" the problem because...
*Tuesday, September 17, 2013 at 5:57pm by Eve *

**math**

The solutions to a quadratic equation are 3/8 and 2/5. Write the quadratic equation in standard form show all appropriate work. (standard equation: f(x)=a(x-h)^2+k)
*Thursday, September 25, 2008 at 6:45pm by shannon*

**math**

Renee must solve the equation 4x+12=6x. If she subtracts 4x from the left side of the equation, what should renee write on the right side of the equation?
*Wednesday, May 4, 2011 at 4:51pm by natalie*

**algebra 2**

Petra needs to find the equation of a line through (–2, 3) that is parallel to the line represented by y = 2x– 4. Which equation best represents Petra's equation?
*Friday, February 10, 2012 at 3:14pm by Lalt*

**algebra 1**

Thelma wants to find the equation of a line that passes through the point (2, 2) and is perpendicular to the line Which equation best represents Thelma's equation?
*Monday, April 29, 2013 at 7:49pm by shay*

**math+check!**

okay so the question is as follows: determien the standard form of the equation of a hyperbola with vertices(+or- 2,0) and passing through (4,3) is this right? x^2/2^2 - y^2/b^2 =1 Since P(4,3) passes through, the x and y coordinates satisfy the equation: 4^2/2^2 - 3^2/b^2 =1 ...
*Tuesday, December 5, 2006 at 8:45pm by sammy boy!*

**Algebra**

Solve the quadratic equation. 3x^2-15x+18=0 I know that the formula to quadratic equation is x=-b+and-(square root)b^2-4ac divided by 2a. I know that a=3, b=-15 and c=18, then subsitute in and get two answers, my problem is that I keep getting an answer that does not work ...
*Thursday, April 22, 2010 at 10:25pm by Lexie*

**College Algebra**

using the knowledge of systems of equations, and that the equation of a circle is (x-h)^2 + (y-k)^2 = r^2, where (h,k) is the center and r is the radius. Find the equation of a circle that contains the following points: (6,2), (4,6), and (-3,5). (These 3 points each create an ...
*Thursday, December 15, 2011 at 12:27am by Kevin*

**College Algebra**

using the knowledge of systems of equations, and that the equation of a circle is (x-h)^2 + (y-k)^2 = r^2, where (h,k) is the center and r is the radius. Find the equation of a circle that contains the following points: (6,2), (4,6), and (-3,5). (These 3 points each create an ...
*Thursday, December 15, 2011 at 12:27am by Kevin*

**chemistry**

Does this equation need to be balanced? AlCO3 => AlO+CO2 Also, how would this equation be balanced? NiCl+O2 => Ni2O3+Cl2O5 Neither equation you have is an equation so they can't be balanced. Do you mean aluminum carbonate. That would have the formula Al2(CO3)2. Aluminum ...
*Thursday, December 14, 2006 at 6:43pm by Carter*

**Pre Cal**

6-x=2x+9 If you are to solve the equation for x, first try to get the variable on one side of the equation. Let's subtract 2x from both sides to start (whatever operation you do to one side of an equation you must do to the other side as well): 6 - x - 2x = 2x - 2x + 9 6 - 3x...
*Monday, January 15, 2007 at 7:05pm by Kayla*

**Geometry HELP!!!**

What happens to the graph of the line y = 3x -2 when the equation is changed to y = 3x +6? What happens to the graph of the line y = 2x - 5 when the equation is changed to y = 5x + 6? On the first question: What happens to the graph of the line y = 3x -2 when the equation is ...
*Tuesday, October 10, 2006 at 8:12pm by Margie*

**calculus**

dy/dx= (2x-2xy)/(x^2+2y) Find all points on the curve where x=2. Show there is a horizontal tangent to the curve at one of those points.
*Thursday, October 18, 2007 at 10:11pm by ssss*

**calculus**

dy/dx= (2x-2xy)/(x^2+2y) Find all points on the curve where x=2. Show there is a horizontal tangent to the curve at one of those points.
*Saturday, October 20, 2007 at 5:54pm by sara*

**calculus**

dy/dx= (2x-2xy)/(x^2+2y) find all points on the curve where x=2. show there is a horizontal tangent to the curve at one of those points.
*Tuesday, October 30, 2007 at 4:17pm by sara*

**math**

find the eqt. of tangent to the curve y=-x^2+2x-10 @ the point where the curve cuts the y-axis.[ans:y=2x-10] how do i do this because they didnt give me the point...?
*Friday, July 22, 2011 at 9:25am by rob*

**Calculus-derivatives**

What is the slope of the tangent of each curve at given point y=√(16x^3), (4,32) If I find the derivative of y=√(16x^3) Will it be 16/-x^3
*Wednesday, February 15, 2012 at 10:17pm by Jake*

**Math**

Find the function f, given that the slope of the tangent line at any point (x,f(x)) is f '(x) and that the graph of f passes through the given point. f '(x)=6(2x-7)^5 at (4, 3/2)
*Wednesday, April 9, 2014 at 10:11pm by Vanessa*

**Math (Trig)**

I have a unit circle graph like the one at the top of a website (do a google search for 'unit circle trig functions' and click the second link, since I can't post links). I need to label the sine, cosine, tangent, secant, cosecant, and cotangent. I found several pictures that ...
*Sunday, March 18, 2007 at 11:33pm by Chris*

**calculus**

when finding the tangent line to the curve using T(t)= r(t)prime/ /r(t)prime/ and the eq. of the curve being r(t)= (e^t, te^t, te^(t^2)), at point (1,0,0) why does t=o. How is the parameter for t found or calculated?
*Saturday, December 13, 2008 at 7:27pm by maria*

**college math**

find the slope of the tangent line to the graph of f at the given point. Graph f and the tangen line. 9. f(x) = 3x +5 at (1.8) 10. f(x)=2x + 1 at (-1,3) Please, help me with this problems. thanks
*Wednesday, October 19, 2011 at 12:04am by Dave*

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