If f (x) = 3x + 3, g (x) = 3x + 3, and h (x) = x + 3, what is [g o f o h] (-5) ?

A: - 30

B: - 24

C: - 15

D: - 6

The answer would be - 6.

Start by substituting - 5 into the 'h' function.

h (-5) = - 5 + 3 = - 2

Now substitute this answer into the 'f' function.

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

now substitute this answer into the 'g' function

g (-3) = 3 (-3) + 3 = - 6

D is your answer