Question

What is the value of the expression below when x = –2?

5 + 3(x – 7) – (x + 1)

A.
–5

B.
–7

C.
–21

D.
–23

Answer 1

I hope this helps:

f(x) = 5 + 3(x - 7) - (x + 1)

f(-2) = 5 + 3( -2 - 7 ) - ( -2+1)

= 5 - 6 - 21 + 2 -1

= - 21

Answer 2

so the answer is c