Can you help me with this​

This is different from the first one can someone me

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

Sherrie is baking a pie for her family. she leaves the room and comes back to 35% of the pie having been eaten before she can put the topping on. how much 1 square inch strips of dough will she need for the top, now that a portion is missing? round your answer to the nearest while nimber.