Thursday

February 11, 2016
Number of results: 117,275

**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**

Need help Give an example of an exponential function that goes through the point (0,4) .
*November 25, 2015 by Reese*

**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**

Im having a little trouble help please? 1.Given the table below, evaluate the following: x -3 -2 -1 0 1 2 3 4 5 f(x) 10 20 30 40 50 60 70 80 90 g(x) -1 -2 -3 -4 -5 -6 -7 -8 -9 a. (3f+2g(1) b. (fog)(-1) 2. Express the following function, H(x) as a composition of two functions f...
*October 8, 2015 by ryan*

**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**

If you deposit $5,000 in an account that pays 5% interest compounded annually, how much money will you have in your account at the end of 15 years? Write an exponential function that represents this situation. I got 1,500,000 but im not sure if i did it right and im stuck
*November 25, 2015 by Ryan*

**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**

True or false (logx)^2=2logx True or false in56/in7=in8 i got true for the first one and false on the second im sorry for posting today but i just need someone to check
*November 26, 2015 by Ryan*

**Pre-calculas**

A conical tank of radius R=19 feet and height of H=16 feet is being filled with water at a rate of 9ft 3 /min . (a) Express the height h of the water in the tank, in feet, as a function of time t in minutes
*January 27, 2016 by Help Please*

**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**

The function C(x)=x2−4x+28 models the cost, in hundreds of dollars, to produce x thousand pens. Find the total cost to produce 36,000, 139,000, and 222,000 pens. (a) Cost to produce 36,000 pens is?
*January 19, 2016 by Answer please!*

**math- 165 calculas**

Find the horizontal asymptote of the graph of the function. (If an answer does not exist, enter DNE.) f(x) = 5x^2 + 1/ 7x^3 − 2x^2 + 5
*October 6, 2015 by akash*

**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*

**Pre-calculas**

Boat A leaves a dock headed due east at 1:00 PM traveling at a speed of 16 mi/hr. At 2:00 PM, Boat B leaves the same dock traveling due north at a speed of 18 mi/hr. Find an equation that represents the distance d in miles between the boats and any time t in hours for t≥...
*January 27, 2016 by Help Please*

**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**

Evaluate the definite integral. S4 (-3x+4) dx 1
*November 10, 2015 by Please Help !!!*

**math- 165 calculas**

Find the horizontal asymptote of the graph of the function. (If an answer does not exist, enter DNE.) f(x) = x^3 − 3x^2 + 5x + 1/ x^2 − 5x + 3
*October 6, 2015 by akash*

**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**

7. For the function defined by: f(x)= {x^2, x<=1} {2x+1, x>1} a. evaluate f(0) 8. Solve the following system of equations algebraically. Verify your solution either graphically or by using matrices. 3x-y=0 5x+2y=22 9. Solve the following system of equations algebraically...
*October 6, 2015 by Bob*

**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*

**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**

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*

**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*

**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**

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*

**math- 165 calculas**

An open box is to be made from a eighteen-inch by eighteen-inch square piece of material by cutting equal squares from the corners and turning up the sides (see figure). Find the volume of the largest box that can be made. figure ( a box and one side is 18-2x) v= ? in^3
*October 6, 2015 by akash*

**calculas**

airplanes fly from left to right along the path y=1+(1/x)and can shoot their bullets in the tangent direction at creatures placed along the x-axis at x=1,2,3,4 and 5.determine whether a creature will be hit if the player shoots when the plane is at p(1,2)
*November 25, 2015 by khalid*

**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*

**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*

**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*

**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 *

**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*

**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**

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*

**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*