Use a system of linear equations to solve Exercises 73–84.

A number of studies have emphasized the importance of sleep for students’ success in their academic performance. The bar graph shows the actual sleep hours and the sleep hours to function best for U.S. college students.

A total of 45% of college students sleep between 5 and 7 hours or between 9 and 11 hours. The difference in the percentage who sleep between 5 and 7 hours and between 9 and 11 hours is 41%. Find the percentage of college students who sleep between 5 and 7 hours and the percentage of college students who sleep between 9 and 11 hours.

Transcribed Image Text:

Percentage of College Students 80% 70% 60% 50% 40% 30% 20% 10% Sleep Hours of U.S. College Students Actual sleep hours Sleep hours to function best -66 **** 2 [3,5) X 12 [5,7) 50 [7,9) Sleep Hours ************* 20 [9, 11) ................