Question

For the functions f(x) = 2x + 4 and g(x) = 3x + 1, find g(f(5))

A.7
B.8
C.18
D.25

Answer 1

43

Explanation:

f(x) = 2x + 4 and g(x) = 3x + 1,

find g(f(5))

f(5) = 2x+4 where x=5

=2(5) +4

= 10+4

= 14

f(5) =14

The substitute x=14 into g(x)

g(x) = 3x+1

g(15) = 3(14) +1

=42+1

=43