At the top of a roller coaster hill you're 210 feet above ground at the bottom of the hill you are 15 feet above ground Right an integer that represents the change and height from the top to the bottom ​

Ineed to learn how to solve this problem

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

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?