You are moving in the path of a parabola.
The conic section is parabolic - the street is the directrix and the mailbox is the focus.
(7x2+x+9)-(3x2+4x-5)
4x2-3x+4 is your answer (:
U have to subtract the new number by the discount and get your and wet
You should get the app "photomath" that'll help you out alot!!!
