Question

What is the answer for this problem if f(x)= 3x+10x and g(x)=5x-3, find (f+g)(x).

A. 3x+15x-3
B. 3x+5x+3
C. 3x-5x+3
D. 18x-3

Answer 1

This just means that f(x) and g(x) are added, so (f+g)(x) = f(x)+g(x)
f(x)+g(x) = 3x+10x+ 5x-3 = 18x-3

Answer 2

`(f+g)(x) =f(x)+g(x)=3x+10x+5x-3=\boxed{18x-3}\ D.`