Question

Given the functions f(x) = 7x + 13 and g(x) = x + 2, which of the following functions represents f[g(x)] correctly?

A. f[g(x)] = 7x + 15
B. f[g(x)] = 7x + 27
C. f[g(x)] = 7x2 + 15
D. f[g(x)] = 7x2 + 27

I think it's C.

Answer 1

I meant B

Answer 2

f[g(x)] = 7x + 27
because if you are trying to find f[g(x)] just sub x+2 for an x in equation f(x)=7x+13

Answer 3

So yeah B.

Answer 4

Thx