please help don't understand this...Assume f(x) = 2x + 8 and g(x) = 5. What is the value of (f + g)(3)?

Answer 1

(f+g)(x) = f(x) + g(x)
= (2x+8) + (5) = 2x+13
(f+g)(3) = 2*3 + 13 = 19