Grades are often computed using a weighted average. Suppose that in calculus I homework counts 10%, quizzes 20%, and test 70%. Pat has the following grades:
Homework (out of 100 points each): 85, 97, 80, 87
Quizzes (out of 30 points each): 27, 25, 29, 30, 20
Tests (out of 100 points each): 90, 87, 82, 88