Two joggers run 8 miles north and then 5 miles west. What is the shortest distance they must travel to return to their starting point? How much shorter would it be if he could take a short cut to the end of his run?

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.