Which method most efficient method to solve x2+5x-6=0

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?

Part a: sam rented a boat at $225 for 2 days. if he rents the same boat for 5 days, he has to pay a total rent of $480. write an equation in the standard form to represent the total rent (y) that sam has to pay for renting the boat for x days. (4 points)

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?