Question

find (f+g)(x) if f(x)=3x+10x and g(x)=5x-3
A. 3x+5x+3
B. 18x-3
C. 3x-5x+3
D. 3x+15x-3

Answer 1

This is the concept of algebra. Given that f(x)=3x+10x and g(x)=5x-3, then:
(f+g)(x)
=f(x)+g(x)
=3x+10x+5x-3
=18x-3
the answer is B. (f+g)(x)=(18x-3)