Question

Let f(x) = 4x + 3 and g(x) = -2x + 5. Find (g o f)(5)

Answer 1

-41

Explanation:

(g o f)(5) can be written as g(f(5)). So we first need f(5), which is ..

f(5) = 4(5) + 3 = 23

Now find g(23)

g(23) = -2(23) + 5

g(23) = -46 + 5 = -41