Juan has taken four skill checks for the third grading period and earned a 60, a 75, an 85 and a 95. If the Unit Test counts as TWO skill check grades, what is the range of scores that Juan can earn on the Unit Exam so that he will earn a B? (Between 79 and 90)

Use the inequality from question number 4 to find the range of grades Juan must earn on his unit exam to meet his goal.