akohler0011 akohler0011

17-04-2019
Mathematics

contestada

(help ASAP)

find f(g(x)) if f(x) = 4 - 2x and g(x) = x + 12

a. -2x - 20
b. -x + 16
c. -2x - 8
d. -x - 20

Respuesta :

wellwin wellwin

18-04-2019

A.

f(g(x)) just means you should go to f(x) and replace every instance of the variable x with g(x). So:

f(g(x)) = 4 - 2(x + 12)

And from here you just simplify:

f(g(x)) = 4 - 2x - 24

f(g(x)) = - 2x - 20

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