I could really use some help with this question. Can you please show your work so I can see how to do it right?

Question

Assume f(x) = 4x+8 and g(x)=5.

 

What is the value of (f+g)(2)

Answer 1

f(x) = 4x+8

g(x) = 5

Using

 

f(x) + g(x) =( f+g) x = 4x+8 +5 =4x +13

 

so (f+g) (2) = 4*2+13 = 8+13 = 21