Respuesta :

Answer:

f(x)=18

Step-by-step explanation:

When it gives you f(3), it is basically telling you that you need to plug in 3 for x. Doing so would give you f(3)=6(3) and you can multiply 6 and 3 together to get 18.

F(3)=18
You have to multiply 3 by 6 because x is 3