Question

Let f(x) = -2x - 7 and g(x) = -4x + 3. Find (f ° g)(-5).

A. 23

B. –53

C. –9

D. 3

Answer 1

open circle means apply g(-5) first, and then use the result for the f(x) function

Answer 2

do i use -5 for f(x) as well?

Answer 3

no, you use the result of g(-5) as x in f(x)

Answer 4

kind of like f(g(-5))

Answer 5

so g(-5) = -4*(-5) +3 = 23

f(23) = -2*(23) -7 = -53

so your answer is -53

Answer 6

gracias mi amigo