A book store offers a sale on a new book. The sale is "buy two of the books and get the third book free." Tommy pays $26 for three of the books. What is the average amount of money that Tommy saved on each of his three books due to the sale? Round to the nearest cent.

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.