The guitar originally cost $60 but there is a 25% discount and you have a coupon for 18% off, what is the final price?

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

Find the maximum value of p= 4x + 5y subject to the following constraints :

Square a has a side length of (2x-7) and square b has a side length of (-4x+18). how much bigger is the perimeter of square b than square a?and show all work! you so