Question

What is fºg(x) if f(x) = 2x + 7 and g(x)=-3x+4?

Answer 1

Answer

(f o g) (x) = -6x + 15

Explanation

We are given that

f(x) = 2x + 7

g(x) = -3x + 4

(f o g)(x) means writing the formula for f(x), but replacing the x with g(x)

(f o g) (x) = f[g(x)] = 2[g(x)] + 7 = 2(-3x + 4) + 7 = -6x + 8 + 7 = -6x + 15

Hope this Helps!!!