Question

Let f(x) = -3x - 4 and g(x) = 2x - 6. Find (f * g)(-7)

A. -20

B. 56

C. 28

D. 17

Answer 1

Answer: B: 56

Step-by-step explanation: First find f(g(x)). Where f(x) = -3x-4 and

g(x) = 2x-6. Replace X in f(x) with the equation for g(x)

f(g(x)) = -3(2x-6) -4. Then use the foil method and simplify.

= -6x+18-4

=-6x+14

Now sub. in the value of x with -7 and evaluate.

=-6(-7)+14

=42+14

=56