In your class, you have scores of 79, 77, 78, and 94 on the first four of five tests. To get a grade of B, the average of
the first five tests scores must be greater than or equal to 80 and less than 90.
a. Solve an inequality to find the range of the score that you need on the last test to get a B.
b. What score do you need if the fifth test counts as two tests?
a. The range of scores you need on the last test to get a B is