1,063 Answered Questions for the topic Pre-Calculus

Pre Calculus

02/10/15

Find the inverse of g(x)=7x^3+3
I need help
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Pre Calculus

02/10/15

Use synthetic division to evaluate f(x)= x^5+5x^4-3x^3+x^2+7x-12 at x=-1
Again with this one as well.
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Pre Calculus

02/10/15

Use synthetic division to evaluate f(x)= x^5+5x^4-3x^3+x^2+7x-12 at x=3
I'm confused how to do this
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Pre Calculus

02/08/15

On what intervals is the graph of f(x)= (3/2)^-x)+2 decreasing?
what intervals is the graph of F(x)=(3/2^)-x)+2
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Pre Calculus

02/08/15

There was one heart transplant in 1967 by Dr. Christian Bernard of South Africa. In 1987, there were 1,418 heart transplants
a.) Find the exponential growth function that fits this data b.) Use this function to predict the number of heart transplants in 2015
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Pre Calculus

02/03/15

Reflect f(x)=x^2 about the y-axis. What changes?
Can someone help
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Pre Calculus

02/03/15

If h(x)=x^3, what is the difference between h(x) reflected about the x-axis and h(x) reflected about the y-axis?
help please!
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Pre Calculus

02/03/15

Find all the maximums of the polynomial f(x)=x^2-8x+11? What is the global (absolute) maximum?
can someone help me please
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Pre Calculus

02/03/15

Find the inverse of g(x)=(x+7)^3+4
Help me !
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Pre Calculus

02/03/15

Assuming both of the function and its inverse exist everywhere, find h°h^-1°h°h^-1°h°h^-1(7)
I need help please
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Pre Calculus

02/02/15

Describe the function resulting from reflecting f(x)=x^3+2x^2-x+5 about the y-axis and then shifting to the left by 4. Is this the same as performing the operat
I really need help please
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Pre Calculus

02/02/15

Describe the function resulting from reflecting f(x)=x^3+2x^2-x+5 about the x-axis and then the y-axis. Does the order of the reflections matter?
I can't get to understand this question and I'm completely lost.
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02/02/15

Find the points on circle (x+1)^2 + (y+1)^2 = 1 at which the slope of tangent line is 2
Find the points on circle (x+1)^2 + (y+1)^2 = 1 at which the slope of tangent line is 2use step by step instructions on how to solve the problem
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Pre Calculus

01/25/15

A builder reduced the price of a house by %20. If the new price is $440,000, what was the original price?
I really need help with this question, I don't know how to set up the problem in order to solve it.
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Pre Calculus Word Problems Math Help

01/25/15

If the Velocity of a particle doubles, how many times its Kinetic Energy changes?
 so i have K=(1/2)MV2   
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Pre Calculus Adding Radicals

01/25/15

7v(6) + 4v(54)
Here's my work: 7√(6) + 4√(6 • 9) = 7√(6) + 7√(6) = 14√6 My teacher marked this as wrong on my test, though. What did I do wrong(as I don't see it and can't figure it out)?
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Pre Calculus

01/23/15

Find an expression that represents the (total) cost to build the curved roof as a function of the radius r of the semicircular end.
A wind tunnel is formed of a half cylinder with a rectangular base and semicircular ends. The volume must be 10000 ft3 and the curved roof costs $7 per ft2 to build. Find an expression that... more
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01/21/15

Dimensions of a Pool
A swimming pool is 8 ft. longer than it is wide. The pool is surrounded by a walkway with a width of 4ft. The combined area of the pool and the walkway is 1280 ft.^2. Find the dimensions of just... more
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01/21/15

Volume of an open topped box
A square of side x inches is cut out of each corner of a 10 in. by 13 in. piece of cardboard and the sides are folded up to form an open-topped box. A) Write the volume (V) of the box as a function... more
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Pre Calculus Area Rectangle

01/21/15

area of 4700 ft. ^2. Its perimeter is 400 ft. Write the area as a function of the length of the rectangle. Find the values of the length and width.
Please help, I want to understand how to answer it, not just the answer
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Pre Calculus Pre Cal

01/03/15

what is the multi-rule definition for the abs (X^2-2x-8)?
what is the multi-rule definition for the abs (X^2-2x-8)? I know that x=4 and x=-2 I don't know how to come up with multi-rule  
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Pre Calculus

12/19/14

How long will it take so the balance will reach $2500.
Assume you have deposited $1500 into a bank with a fixed interest rate of 5% a and compounded continuously. How long will it take so the balance will reach $2500. Please show work. 
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Pre Calculus Math Algebra 1 Algebra 2

12/15/14

Can anyone check my answer?
Which of the following statements are true? Check all that apply.   F(x)=1/2cube root-2 has the same domain and range as f(x)=cube root . The graph of f(x)=1/2cube root looks like the graph of... more
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12/15/14

Help with infinities..
Which of the following functions have a domain of (-∞, ∞) and a range of (-2, ∞)? Check all that apply. F(x)=3^x+2 F(x)=3^x-2 F(x)=0.25^x+2 F(x)=0.25^x-2
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Pre Calculus Math Help

12/14/14

Pre-Calc Question
Which of the following is the equation of a line perpendicular to the line y = -10x + 1, passing through the point (5,7)? 1/10x-y=-13/121/10x+y=-13/21/10x+y=-13/2-1/10x-y=13/2
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