Question

If f(x) = 4x – 7 and g(x) = 2x + 4, evaluate f(x) + g(x) for x = –3.
A.
–52
B.
–21
C.
–22
D.
–15

Answer 1

first step is same like last one
add both function and then replace x by -3

Answer 2

f(x)+g(x)=
( 4x – 7)+( 2x + 4)
=6x-3


now substituting x=3
6(3)-3=15

Answer 3

sorry subtituting x=-3
=6(-3)-3=
-18-3=-21

Answer 4

thanks!