Respuesta :

TakeItAllAway
You just need to exchange the “a” with the number 3 so:

f(3) = 7(3+1) - 5 = 7(4) - 5 = 28 - 5 = 23.

f(3) = 23
JilliLange9

Answer:

F(3)=23

Step-by-step explanation:

F(3)= 7(3+1)-5

F(3)=7(4)-5

F(3)=28-5

F(3)= 23

you always want to do the problem in the parenthesis first. and you replace a with 3