Answer:
10 and 20
Step-by-step explanation:
given f(x) = x², g(x) = 5x and h(x) = x + 4
(7)
To evaluate g(h(- 2)), evaluate h(- 2) and then evaluate g(x) with this value
h(- 2) = - 2 + 4 = 2, hence
g(2) = 5 × 2 = 10
(8)
To evaluate h(f(4)), evaluate f(4) and then evaluate h(x) with this value
f(4) = 4² = 16, hence
h(16) = 16 + 4 = 20
