Answer is - 2.
Step-by-step explanation:
(f+g) (x)=f(x) +g(x)=x^2 -2x +6x+4
=x^2 +4x+4=0
If x=-4, then (f+g) (-4) =16-16+4=4
if x=-2, then (f+g) (-2)=4-8+4=0
john earns $14.00 for two hours of work.