Question

Let f(x) = –4x + 7 and g(x) = 10x – 6, find f(g(x)).

–40x + 70

–40x + 64

–40x + 24

–40x + 31

Answer 1

You want to find f(g(x)).

So you simply start by placing g(x) everywhere where there is a "x" in f(x) function, so:
\[f(g(x))=-4(10x-6)+7\]
Then you simplify

Answer 2

g(x) = 10x - 6

f(x) = -4x + 7

f(g(x)) = -4(10x - 6) + 7
f(g(x)) = -40x + 24 + 7
f(g(x)) = -40x + 31

Answer 3

thanks