Question

[Function Composition] could someone help me with this answers or show work either is fine

Answer 1

2a+7

Explanation:

Given the functions

f(a) = 2a-3

g(a) = a+5

We are to find fog(a)

fog = f(g(a))

f(g(a)) = f(a+5)

Replace a with a+5 in f(a)

f(a+5) = 2(a+5)-3

f(a+5) = 2a+10-3

f(a+5) = 2a+7

Hence (fog)(a) is 2a+7