Answer:
6x+4
Step-by-step explanation:
(2x-1)+(4x+5)
2x+4x-1+5=6x+4
f(x) = 2x-1
g(x) = 4x+5
f(x) + g(x) = 2x-1 +4x+5
= 2x+4x -1+5
=6x +4
