Question

find (f+g)(x) if f(x)=5x-2 and g(x)=2x+1
A. 7x-1
B. 7x-3
C. 3x-1
D. 4x-3

Answer 1

This is an addition problem.

Rearrange the given equations as

+ f(x)=5x-2 
+g(x)=2x+1
----------------
Add up each column, as follows:  (f+g)(x) = 7x - 1   (answer)

Answer 2

7x-1 is the correct answer