College Algebra 5 problems to solve

Must show all work.

Must provide explanation of answer to prove it is correct

Name:
Directions: Show all work in the spaces provided. Place your
answers on the lines provided.
1. In which of the following equations is y a function of x.:
a). x + 2y = -4
b). x – y = 2
Ans.
2. Given f(x) = 4x – 8x+9, find f(-1).
Ans.
3. Given f(x) =
(3x + 4 x S2
x² + 1 x 2
, find f(3)
.
Ans.
4. Given f(x) = 3x-1 , find f(x – 1) – f(2)
Ans.
5. Find the domain of the function :
f(x)
5x
x² – 7x + 12
Ans.