A grocery store sells a bag of 5 oranges for $3.10 if Levi spent $2.48 on oranges, how many did he buy

Melanie is buying a bathing suit that costs 39.99. she is given a discount at the cash register of $6.00 when she scratched 15% off on a game piece for a store promotion. what will the sale price of melanie’s bathing suit be?

Plzzz answer both questions and i will give you 100 points

2f(x)= x+3 if 4 < x < 8 2x if x 28 2