Thursday

August 27, 2015
Number of results: 109,312

**pre -calculas**

No answer.
*April 25, 2012 by Anonymous*

**pre-calculas**

Can someone please help me?
*September 18, 2012 by ladybug*

**pre-calculas**

rationalize the denominator: 5 + the sq. rt. of 3 ________________________ 4 + the sq. rt. of 3
*February 16, 2014 by Marina*

**Pre Calculas**

verify the following 1+1/csc^2x-1=sec^2x
*November 2, 2011 by Raven*

**pre-calculas**

Use "completing the square" to find the zeros of the polynomial. =2x squared + 6x + 5 = 0
*February 16, 2014 by Marina*

**pre-calculas**

find the LCD and solve: x+3 12x + 4 1 - 2x ____ + _________ = _______ 3-x x squared - 9 x + 3
*February 16, 2014 by Marina*

**Pre-calculas Math**

how to find the exact value of: cos(9*pi/12)*cos(5*pi/12)+sin(9*pi/12)*sin(5*pi/12)
*November 4, 2012 by Jon*

**Pre Calculas**

how would you varify the following sinx+sinx cot^2x=cscx
*November 2, 2011 by Raven*

**pre-calculas**

what is the function whose graph is the graph of y=+4, but is reflected about the the x-axis. y=
*September 19, 2012 by ladybug*

**pre-calculas**

write a function whose graph is the graph of y=x^2, but is shifted to the left 6 units.
*September 18, 2012 by ladybug*

**pre-calculas**

simplify the following complex fraction: x ____ -2 x-5 _____________________________________ x squared - 9x - 10 ____________________ x squared - 25
*February 16, 2014 by Marina*

**Pre-Calculas**

I a lighthouse is 75 feet tall and boat is out at sea 40 min away, how far is the boaat from the lighthouse. I'm stump on this problem..Help!
*September 1, 2011 by Carlos*

**Pre Calculas**

A man who can row in still water at 3 mph heads directly across a river flowing at 7 mph. At what speed does he drift downstream?
*May 12, 2015 by Jared*

**pre-calculas**

Find the function that is finally graphed after following transformations are applied to the graph of y=x in the order list 1. shift down 8 units 2. reflect the x-axis 3. reflect the y-axis
*September 18, 2012 by ladybug*

**pre-calculas**

Find the slant asymptote, if any, of the rational function. Do not graph the function. (Enter your answers as a comma-separated list of equations. If an answer does not exist, enter DNE.) f(x) = x2 − 2x + 15 _____________ x + 7
*March 10, 2013 by melanie*

**Pre-Calculas**

The voltage E of an alternating current electrical circuit can be represented by the sinusoidal function E = 220 cos( t), where E is the measured in volts and t is measured in seconds. How long does it take the alternating current to complete one full cycle?
*September 10, 2011 by Anonymous*

**Pre-Calculas 11**

a farmer wants to build two pens (one for cows, the other for horses) on land by a straight road. There is already a fence along the road and the farmer has 800m of fencing to build his fence to enclose the pens and seperate them as shown in the diagram below. what is the ...
*October 1, 2013 by Ravneet Gill*

**Pre Calculas**

A GARDENER HAS 60' of edging. She wants to use it to enclose a 120 square foot rectangular area. She does not have to use up all of the edging. what are the possible lengths that a side of the rectangle can have? Answer using interval notation. Hint: if the length of the ...
*May 23, 2013 by Laura*

**pre-calculas**

can someone please help me with this question? Given the function f(x)=3x-9 Find the rate of the change between the stated values for x: 7 to 8 A. Find the equation of a secant line containg the given point (7,f,(7)) and (8,f,8)) B. Find the rate of change between the stated ...
*September 18, 2012 by ladybug*

**calculas**

If f(x)=3x-1 and g(x)=2/3x+2 find: a) f(-3)+g(6) b)f(3)-g(2)
*June 5, 2011 by Genevieve *

**ap calculas**

derivative of (-x^3+3)(3x+2)^3
*March 25, 2013 by Rebecca*

**Math ( calculas)**

find the intervals on which the curve y=x/(x+1)^2 is concave upward or concave downward.
*March 27, 2011 by Tina*

**pre-calculas**

An object is situated so that its center of mass is located at the origin.Three forces X,Y, and Z act on the object at the same time. Force X passes through the point (-3, -4), forve Y passes through the point (5,-12), and force Z passes throught the point (15,8). Forces X,Y, ...
*May 10, 2012 by R*

**calculas**

how to find the x intercepts for f(x) = 3x^3+7x^2+3x+1
*March 23, 2009 by Sandra*

**calculas**

f(x)=ln[(1+e^2x)/(e^2x-4) find the derivative
*March 29, 2010 by Lori*

**ap calculas**

derivative of (2x^3+5)cos2x^5
*March 25, 2013 by Rebecca*

**calculas **

If f(t) = square root of 7/t^5. Find f'(x) and f'(2)
*October 21, 2010 by sandy*

**Calculas**

Find the length of the curve y=(2x), from x=1 to x=4.
*July 24, 2012 by Drew*

**Calculas**

area between the curves y=4-x^2 and y=x-8
*December 21, 2014 by jessica*

**calculas,math**

A cylindrical can is made from tin.If it can be contain liquid inside it then what is the parameter of design if we are oblige use the minimum amount of tin.
*December 2, 2013 by mash*

**AP Calculas **

Does f(x)=(2x^3-2x)/x^3+x^2-4x-4 have any horizontal asymptotes? How can you tell?
*October 7, 2010 by Yishan shan*

**Calculas**

find the compute derivative of f(x)=sinh^2(5x)
*April 12, 2012 by ASB*

**Calculas**

how to find the x intercepts for f(x) = 3x^3+7x^2+3x+1 please show your steps
*March 23, 2009 by Sandra*

**calculas**

The function f(x)= (8x-7)e^2x has one critical number. Find it
*November 5, 2009 by jenny*

**CALCULAS**

POLAR EQUATION OF INWARDLY SPIRALING SPIRAL
*February 13, 2010 by YAMNA*

**calculas**

let p=(1,1,1), Q=(2,3 5), and R=(-1,3,1). find the area A of thr triangle with vertices P,Q, and R
*December 11, 2012 by Anonymous*

**calculas**

Solve following equations tan^(2 ) x-5tanx=-6
*March 5, 2013 by preet*

**Calculas**

Integrate: Cos^7(2x) Explanation would be helpful
*February 16, 2015 by Pen*

**Calculas**

F(X)=9 csc6(X) it is continous from -infity to infinity except what value?
*October 24, 2012 by Mohammad Al-Abdullah*

**calculas**

Write following equations in polar coordinate then graph them Y=4X
*March 5, 2013 by preet*

**Calculas**

Find the area of the region under the curve y = 12 e ^{3 x} between x = -2.6 to x =2.6
*March 8, 2014 by ryan*

**calculas**

Question # 01 Solve the inequality and sketch the solution on a coordinate line.
*March 20, 2007 by khan*

**Calculas**

I stumble a question I cannot answer please help up. Find value of limit k for equation:
*May 9, 2010 by Mike*

**Calculas**

find the tangent line of the following function Y=2sinx + sinx^2 at the points Pi/6,5/4
*October 26, 2014 by Bashar*

**Pre Calculas**

Complete the identity sin theta / cos theta + cos theta / sin theta = ? Do you mean (sin theta/cos theta) + (cos theta/sin theta) ? That would equal tan x + cot x = tan x + (1/tan x) = (tan^2 x + 1)/ tan x I don't see any way to further simplify it. 1/(cosx)(sinx) or sin^2x+...
*June 10, 2006 by Robert*

**Calculas**

Use the derivative of sinx and cosx to develop the derivatives of y=secx and y=tanx? Help would be much appreciated
*October 26, 2014 by Bashar*

**pre- algebra(MATH)**

I need help with pre-algebra solving equations by multiplying or dividing. Can you help me with this homework for free?
*November 5, 2009 by Ketrice*

**calculas**

Find the volume of the solid that is obtained when the region under the curve y=x+3 over the interval [5, 24] is revolved about x-axis.
*June 28, 2012 by raza*

**Calculas**

Find any critical numbers of the function. (Enter your answers as a comma-separated list.) g(t) = t sqrt6 − t , t < 13/3 I don't even know how to start out!
*February 19, 2012 by Mary*

**Applied calculas**

Let y=〖tan〗^(-1) x Rewrite it as an equation involving a trig function. Use implicit differentiation to determine an expression for y.
*April 8, 2013 by jack*

**calculas**

Find the equations for the tangent line and normal line to the curve for f(x)=(x^4)+(2e^x) at the point (0,2)?
*September 28, 2010 by john*

**calculas**

Consider the function f(x) = 7 xe^{-7.5 x}, 0<_x<_2. This function has an absolute minimum value equal to: which is attained at x=
*February 19, 2014 by ryan*

**Calculas**

Can someone walk me through the following questions: Partial Derivatives f(x,y) = x^7 -8y -3 find x and y f(x,y) = 7 / 5x + 4y, find x and y
*June 11, 2008 by Annette*

**Calculas**

what is the velocity (in ft/s) of a sandbag 2.75 s after it is released from a hot-air balloon that is stationary in the air?
*December 21, 2014 by jessica*

**Calculas**

The slope of the tangent line to the graph of a function, h(t) is 7/2t The function passes through the point (5,3) Find h(4)
*March 2, 2014 by ryan*

**Calculas**

Evaluate lim x→0 10x/√(9+x)-√(9-x)
*March 16, 2013 by Radical Limits!*

**calculas**

Let f(x) = 1+3sin2x be a function, determin the amplitude and the period of the function,
*April 3, 2013 by mathews*

**calculas**

Let f(x) = 1+3sin2x be a function, determin the amplitude and the period of the function,
*April 3, 2013 by mathews*

**calculas**

Let f(x) = 1+3sin2x be a function, determin the amplitude and the period of the function,
*April 3, 2013 by mathews*

**differential calculas**

Find the instantaneous velocity and acceleration at the given time for the straight-line motion described by the equation: s= (t+2)^4- (t+2)^(-2) at t=1 Round to one decimal place.
*November 26, 2012 by Preet*

**Calculas**

Can someone please walk me through the steps for the following Partial derivatives problems: f(x,y) = x^7 - 8y - 3, find x and y f(x,y) = 7 / 5x+4y, find x and y
*June 11, 2008 by Annette*

**high school calculas**

Find the (a) the local extrema, (b) the intervals on which the function is increasing, (c) the interval on which the function is decreasing h(x)=2/x
*November 6, 2008 by pipi*

**Calculas**

I stumble a question I cannot answer please help up. Find value of lower and upper limit of k for equation: (3x^3-5)/x^2 dx = 10 limit: -k , k
*May 9, 2010 by Mike*

**Calculas**

Given f(x)=x^3−2x+5/x+4 and f′(3)=a/b, where a and b are coprime positive integers, what is the value of a+b? Details and assumptions f′(x) denotes the derivative of f(x).
*March 16, 2013 by Derivative of f(x)*

**calculas**

Suppose that the box height is h = 2 in. and that it is constructed using 193 \text{in.}^2 of cardboard (i.e., AB = 193). Which values A and B maximize the volume?
*April 7, 2014 by MEMO*

**pre-algebra**

kk my teach told me to describe and draw things that are about pre-algebra and she told me to write what pre-algebra is... so can anyone help me??
*August 25, 2008 by damainmind*

**differential calculas**

The angular displacement in radians is given by: θ=8√(t^2+2) Find the angular velocity and angular acceleration at t = 0.25 s
*November 26, 2012 by Preet*

**Calculas**

Johnny is designing a rectangular poster to contain 15 in^2 of printing with a 5-in margin at the top and bottom and a 3-in margin at each side. What overall dimensions will minimize the amount of paper used?
*December 7, 2014 by jessica*

**Calculas**

Suppose that the radius r of a right circular cone of fixed height h = 30 cm is increasing at a rate 10 cm/s. How fast is the volume increasing when r = 15? Give your answer correct to two decimal places.
*October 12, 2010 by Jp*

**calculas**

A car braked at a constant deceleration of 45 ft / s2, producing a skid mark measuring 105 feet before coming to a stop. How fast was the car travelling when the brakes were first applied?
*December 4, 2011 by jordan*

**Calculas**

The profit obtained when x barbecues are sold is P(x) = 100 x − 3x^2 (lnx) dollars . Find the marginal profit when 4 are sold.
*April 4, 2014 by jake*

**calculas**

if the length is decreasing at a rate of 2 in./min. while width is increasing at a rate of 2 in./min., what must be true about area of the rectangle
*December 7, 2010 by Anonymous*

**Calculas**

Do I just put in 3 for t? A ball is dropped from a tower 550 meters above the ground with position function s(t) = 4.9t^2 + 550. What is the velocity of the ball after 3 seconds?
*December 16, 2014 by John*

**pre calc**

A math teacher uses four algebra books, two geometry books, and three pre-calculus books for reference. In how many ways can the teacher arrange the books on the shelf if books coiver the same subject matter are kept together?
*September 25, 2011 by Katie*

**Calculas HS**

a trucker handed in a ticket at the toll booth showing that in 2hours she had covered 159 mi on a toll road with speed limit 65mph. the trucker was cited for speeding. why?
*November 6, 2008 by dt*

**Calculas HS**

show that the solution has exactly one solution in the interval x+ln(x+1)=0, 0<and equal to x <and equal to 3
*November 6, 2008 by elley*

**calculas**

find the perimeter of the rectangle with maximum area that can be inscribed in a semicircle of radius 2 ft. if two of its vertices are on the diameter of the semicircle and the other two are on the semicircle.
*December 7, 2010 by Anonymous*

**differential calculas**

A rocket fired at 275 m/s at 36o angle of elevation is described by: x= (275cos〖36〗^0 )t and y= (275sin〖36〗^o )t-4.9t^2 Find the velocity (magnitude and direction) at t = 8 s. Round to 1 decimal place.
*November 26, 2012 by Preet*

**Need some ideas.... for a Pre-K class**

I am teaching a Pre-K class this summer and the theme for the next two weeks is Community History. What could I all my pre-k class to do that connects to this theme? I thought of helping them to construct houses or certain buildings using boxes and also make a large copy of a ...
*July 5, 2008 by MARY*

**Pre-Calculus**

I'm trying to finish up my pre-cal homework and I am stuck on 2 problems... ***determine the intervals over which the function is increasing, decreasing, or constant*** 32. f(x)=x^2-4x 33. f(x)=√x^2-1 (that's square root of x^2-1) thank you so much for the help =)
*September 17, 2011 by Cristina*

**Pre-Calculus**

I'm trying to finish up my pre-cal homework and I am stuck on 2 problems... ***determine the intervals over which the function is increasing, decreasing, or constant*** 32. f(x)=x^2-4x 33. f(x)=√x^2-1 (that's square root of x^2-1) thank you so much for the help =)
*September 17, 2011 by Cristina*

**english **

is pre-analyzed a word? We have pre-analyzed how they would end up if they think they are in love from comparing to Tom and Daisy.
*August 23, 2011 by sam *

**calculas**

caluclas (intersection of three planes) HELP!!!? in the equations k is a real number 1.x-2y+z=4 2.x-y-z=3 3.x+y+kz=1 for what values of k does the system 1.have exactly one solution? 2.have an in finite number of solution?
*March 27, 2011 by ram*

**Chemisrt**

What is pre-exponential factor for diffusion, because i have a problem with this equation. D=D0*exp[-Ea/R*T] where D=2*10^-13 Ea=2.9*10^-19 joules/atom T=1009 K How to find the pre-exponential ?
*July 27, 2014 by Musaka*

**Calculas**

an open box is to be made from a square piece of cardboard whose sides are 19 inches long,by cutting squares of equal size from the corners and bending up the sides. Determine the size of the aquare that is to be cut out so that the volume may be a maximum.
*December 7, 2014 by jessica*

**pre-ap pre calculus **

To solve an equation by finding x-intercepts, Cynthia graphed the function y=x^3-5x+|2x-3| Give several possibilities for the original equation. How do I do it and what's the answer? Thanks
*September 8, 2009 by Anonymous*

**calculas**

x and y are both variables that are differentiable with respect to t, but not to each other. however, there is a relationship between them: x^2=3y^2+7. we also know that x changes with respect to t at a steady rate of square root of 12 (dx/dt=x'= square root 12). when x is 4 ...
*December 7, 2010 by Anonymous*

**calculas**

2) A ball is hit at an angle of 36 degrees to the horizontal from 14 feet above the ground. If it hits the ground 26 feet away (in horizontal distance), what was the initial velocity? Assume there is no air resistance.
*April 6, 2011 by arun*

**Pre Calculus**

Pre Calculus why is sin(-20)/cos 380 equal to tan (-200)
*November 15, 2009 by Pre Calculus*

**Pre-Algebra**

How do you solve this Pre-Algebra problem: $1.25x + $2.25y = $916 x + y = 560
*February 1, 2014 by 8th Grade*

**Limit Calculas**

Evaluate lim->4 sin(2y)/tan(5y) Here is what I have so far. I am not sure the next steps. Can someone help me? 1. sin(2y)/(sin(5y)*cos(5y)) 2. (sin(2y)*cos(5y))/sin(5y)
*September 12, 2012 by Ryan*

**Pre-Calc**

I'm stuck on a pre-calc problem. I need to find y as a function of x, where the constant c is a positive number for In(y-1)+In(y+1)= -x+c express your question as ln[(y-1)(y+1)] = -x+c change that to exponential form e^(-x+c) = (y-1)(y+1) e^(-x+c) = y^2 - 1 y^2 = e^(-x+c) + 1 ...
*May 9, 2007 by Sarah*

**pre alg**

How do u find the GCF with exponets in a 7th gr. pre alg. class?
*January 11, 2009 by tay*

**pre-Algebra**

Sorry, struggling through pre-Algebra .. :-( .. How do i figure out 5x = -20 ?
*February 19, 2010 by Emily*

**differential calculas**

A point moves along the curve that has the parametric equations: x=9t^3- 〖6t〗^2 and y= 〖9t〗^3+27 x and y being in yards and t being in minutes. Find the magnitude and direction of the acceleration when t= 5/2. Round answers to 3 significant figures.
*November 26, 2012 by Preet*

**Pre-Calculus**

I am in Honors Pre-Calculus and am having a hard time understanding my teacher. I feel so stupid. Does anyone have any suggestions on a website that might give me some insight into what I am doing wrong? Thanks!
*October 7, 2008 by Jill*

**calculas**

If sin theta equals two third and zero degrees less than theta less than 90 degrees find cosine theta
*March 12, 2011 by joe*

**calculas**

find the volume of the solid generated by revolving the region about the given line. the region in the first quadrant bound above by the line y=1, below by the curve y=√(sin5x) ,and on the left by the y-axis, above the line y=-1
*December 18, 2012 by akela*

**Pre-Calc**

Can you show me how to find the rectangular equation of r=2costheta + 3 sin theta All I need is an example to work off I was absent today from Pre-Calc and I have homework to do and no explanation with them-Please help with this one Thank you
*October 3, 2011 by Leah*

**To Ms.Sue And All Teachers**

I am new in this website. Please help me with my math homework. How do you subtract fractions? How do you subtract 7 and 2/5 AND 4 and 5/10? (7 and 2/5 - 4 and 5/10) How do you subtract 6/10 and 6/20? Thank you! Please visit the following site for a super good tutorial: http...
*December 30, 2006 by Kaveri*