Questions on Algebra: Functions, Domain, NOT graphing answered by real tutors!

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Question 776018: find the domain and range of: A)y=3x-9 B)y=-|x|+2 C)y=2x^2+6x-7
Click here to see answer by stanbon(75887)

Question 776012: what is the domain and range of f(x)=sqrtx-9
Click here to see answer by tommyt3rd(5050)

Question 776237: Given f(x)=2x+5 and h(x)=3x-8, find:
f(h(6))
Click here to see answer by Tatiana_Stebko(1539)

Question 776227: Suppose that the functions r and s are defined for all real numbers x as follows.
r(x)=2x
s(x)=3x^2
write the expressions for (r+s)(x) and (r-s)(x) and evaluate (r*s)(-1).
(r+s)(x)
(r-s)(x)
(r*s)(-1)
Click here to see answer by Tatiana_Stebko(1539)

Question 776222: given f(x)= 2x^2+5x-3 and g(x)=x^2+7x+12 find (g-f)(x)
Click here to see answer by Tatiana_Stebko(1539)

Question 776313: f(x)= 5-12x
Click here to see answer by oscargut(2103)

Question 776515: f(x)= -6x-1 and g(x)= 4x^2. What is the solution for:
(f+g)(x)
And what is the solution for
(fg)(x)
Click here to see answer by solver91311(24713)

Question 776566: If f(2)=1 and f(4)=-2 then what is f(x)?

I just don't know how to do it....
Click here to see answer by rothauserc(4718)

Question 776776: f(x)=-2x^3+5 find x if f)x)=-49
Click here to see answer by Cromlix(4381)

Question 776747: fg=(1+fg)/(1+1/g^2) make g the subject. i need steps because i am not sure how to solve it

Click here to see answer by solver91311(24713)

Question 776705: a funtion has three x intercepts at x=-2 x=1 and at x=5 if g(2)=-4 give a possible equation
Click here to see answer by solver91311(24713)

Question 776849: Find the domain of the composite function f∘g
f(x)=1/x-9;g(x)=1/x

Click here to see answer by stanbon(75887)

Question 776828: Hello! I need to create a function using step by step instructions. I also need to prove it is a function. I am so lost. Please help me! Thank you for your time!
Dakota Jones
Click here to see answer by rothauserc(4718)

Question 777091: write the function whose graph is the graph o y=x^3+1 but is reflected about the x axis
Click here to see answer by KMST(5328)

Question 777255: A- f=?

Click here to see answer by tommyt3rd(5050)

Question 777205: Find the domain of the function. (Enter your answer using interval notation.)
f(x) =
5x^3 − 5/ x^2 + 2x − 15

Click here to see answer by lwsshak3(11628)

Question 777317: I am having trouble with solving x^2-25 /2 it is asking for the domain, excluded value and real numbers
Click here to see answer by stanbon(75887)

Question 777572: find the domain of x-2/x^2+6x-16
Click here to see answer by lwsshak3(11628)

Question 777607: Please Help me solve f(x)=x-5/square root x^2-9
Click here to see answer by solver91311(24713)

Question 777731: let f(x) = 5/(b+5) - 2/b. Find the domain and simplify.
Click here to see answer by jim_thompson5910(35256)

Question 777804: Find the domain and range of each relation. Is the relation a function? Why or why not? x= -3
Click here to see answer by jim_thompson5910(35256)

Question 777961: f(x)=x^2-3x+1
Click here to see answer by sofiyac(983)

Question 778050: How can I find the domain of t^(2)+4T
Click here to see answer by jim_thompson5910(35256)

Question 778057: Is the domain set for, h(x)=1/(x^(2)+4t equal to (-infinity,-4)U(0,+infinity)?

Click here to see answer by solver91311(24713)

Question 778212: Please help me do f(x)=2x I just started doing functions and I do not understand very much.
Thanks
Click here to see answer by jim_thompson5910(35256)

Question 778286: I'm trying to figure out the domain of this function without a graph.
I tried making it greater than or equal to zero and I ended up with X being less than 4. I'm not sure if it was supposed to be less than or greater than. Mostly I'm confused about the process of finding a domain like this.
Click here to see answer by Edwin McCravy(20054)

Question 778419: State the domain of the function:
f(x) = (8x+12)/(x^2+5x+4)
Click here to see answer by psbhowmick(878)

Question 778434: How many zeros does the function g(x) = 4(x + 2)^5 (x-3)^3 + 5(x-3)^4 (x+2)^4 have?
Click here to see answer by tommyt3rd(5050)

Question 778470: Find the domain and range of \sqrt{x} + 9
Write the answer in interval notation
Click here to see answer by lwsshak3(11628)

Question 778520: Let f(x)=9+x+x ^2 and h not equal to 0.
a. is f(8+1) = f(8)+f(1)?
Yes or No (I think it is no)
b. Find f(x+h)
c. Does (f(x+h)=f(x)+f(h)?
Yes or No
d. Does f(x+h) = f(x)+h?
Yes or No
e. Find f(x+h)-f(x)/h and simplify.
I need to know how to get the answers, not just the answers.

Click here to see answer by solver91311(24713)

Question 778640: List all real values of x such that f(x) = 0

Click here to see answer by psbhowmick(878)

Question 778965: solve the volume of a rectangular prism, V = lwh, for h
Click here to see answer by Alan3354(69443)

Question 778937: If g(x) = 2x + 1 and h(x) = 4x^2 + 4x +7, find a function f such that fog=h.
Click here to see answer by oscargut(2103)

Question 779030: If f(x) = x^2 + 2x + 7, find the following values.
1. f(a)
2. f(a - 3)
3. f(a + 3)
Click here to see answer by josgarithmetic(39613)

Question 779286: Find the domain:
g(x)= (3x+15)/(x^2+8x-20)

Click here to see answer by oscargut(2103)

Question 779355: Find domain of f(x)=√(1-x)/√(x)
Click here to see answer by harpazo(655)

Question 779455: Can you pls help me find an equation of the line passing through the indicated pairs of points. I also need to expres my final answer in slope intercept form.
Here is the problem: ((((1/2,3/5) and (- 1/4,2/5))))
Click here to see answer by AnlytcPhil(1806)

Question 779588: ok so fx =3x+2 so how do i solve f(4)
Click here to see answer by fcabanski(1391)

Question 779729: Find domain and range if f(x)=0
Click here to see answer by solver91311(24713)

Question 779852: the domain of the function 20x^2+2
Click here to see answer by oscargut(2103)

Question 780327: what is the algebraic difference between f(x+h) and f(x) + h. And how does each affect the graph of a function y=f(x)
Click here to see answer by solver91311(24713)

Question 780260: How do you find the domain of f(x)=ln(7-4x)
Click here to see answer by solver91311(24713)

Question 780459: Given f(x) =2/x -1. What is the equetion of the asymptote of f.

Click here to see answer by solver91311(24713)

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