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

(f ° g)(x)=(-2x - 7 )*(-4x + 3)
to find (f ° g)(-5).
keep x=-5 on both sides

Answer 2

idk how to that

Answer 3

(-2x - 7) (-4x + 3) substitute x = -5 and solve

Answer 4

i keep getting 26

Answer 5

(-2(-5) - 7) (-4(-5) + 3)
(10 - 7) (20 + 3)
= ?

Answer 6

i'm getting 69 no matter what i do.

Answer 7

So far, y'all have been trying to multiply, when the problem is a composition problem. I.e.,\[(f ° g)(-5)=f(g(-5))=f(23)=-53\]

Answer 8

is this a composition or are you multiplying f and g

Answer 9

thank you!

Answer 10

The circle or dot means composition.\[f \circ g(x)=f(g(x))\]