Question

Let f(x)=x+5 and g(x)=x^2 help?

Answer 1

81 = g(f(4)) (Second answer choice)

Explanation:

g(x) = x². Replace each instance of x with f(x) = x + 5:

g(f(x)) = (x + 5)²

Now evaluate this at x = 4:

g(f(4)) = (4 + 5)² = 9² = 81 = g(f(4))