The amount of money (y) that Juan has for any given week (x) can be modeled by the equation y 7x + 80. About how long will it take for Juan to spend all of his money?

Astore is having a sale in which all items are reduced by 20 percent. including tax, jennifer paid $21 for a pair of shorts. if the sales tax is 5 percent, what was the original price of the shorts