What is equivalent to 13 - √-18?

4
13 - 9i
13 + 9i
22

(if f(x)=4x^2 and g(x)=x+1, find (f o g)(x)

Can anyone me with 32,33,36,37,and 40.

14. (05.02 lc) what is the value of y in the solution to the following system of equations? (5 points) 2x + y = −4 5x + 3y = −6