Question

help pls! find g(x)+ f(x)=-3x+4 and g(x)=5x+12

Answer 1

(-3x+4) + (5x + 12) = 2x +16
The answer is D.
Hope it helps!

Answer 2

Replace f(x) and g(x) with what they equal:

$(5x + 12) + (-3x + 4)$
$5x + 12 - 3x + 4$

Combine like terms:

$5x - 3x = 2x$
$12 + 4 = 16$

$2x + 16$

The answer is D.