Respuesta :

Space

Answer:

f(5) = 21

Step-by-step explanation:

Step 1: Define

f(x) = 6 + 3x

f(5) is x = 5

Step 2: Substitute and Evaluate

f(5) = 6 + 3(5)

f(5) = 6 + 15

f(5) = 21