Respuesta :

Answer: f(a-2)=3a-10  

Step-by-step explanation:

To find f(a-2), you plug in a-2 into x.

f(a-2)=3(a-2)-4                 [distribute]

f(a-2)=3a-6-4                   [combine like terms]

f(a-2)=3a-10  

After plugging in a-2 into x, f(a-2)=3a-10.