Hello! Please help! (directions on the image) :D

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

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

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60