If f(x) = 8 - 10x and g(x) = 5x + 4, what is the value of ()?
-196
-168
22
78

()=-168

step-by-step explanation:

() means f(-2) times g(-2).

so if we can find the value of each of the functions at x=-2, all we have to do at the end is multiply our results to find ().

let's begin.

f(-2):

f(x)=8-10x for x=-2

f(-2)=8-10(-2)

f(-2)=8+20

f(-2)=28

g(-2):

g(x)=5x+4 for x=-2

g(-2)=5(-2)+4

g(-2)=-10+4

g(-2)=-6

so now finally f(-2) times g(-2) gives you:

28(-6)

-168

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right