Can someone helP

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

Do, h = (7, 9) (14, 18) the scale factor is

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.