Respuesta :
Answer:
18
Step-by-step explanation:
f(2)=3(2+4)
f(2)=3(6)
f(2)=18
Simply change every x in the function to 2
f(2)= 3[(2)+4]
f(2)= 3(6)
f(2)= 18
f(2)= 3[(2)+4]
f(2)= 3(6)
f(2)= 18