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