In a survey at a local​ university, 45% of students say that they get less than the recommended eight hours of sleep per night. In a group of 2800 ​students, how many would you expect get eight or more hours of sleep per​ night?

Prove that quadrilateral is a rhombus.

How do you determine if an ordered pair is a solution to a given equation?

Liz is shipping a package to her friend. the maximum weight of a medium flat-rate box is 20 pounds, including the box which weighs 6 ounces. write and solve an inequality to describe the possible weight in pounds, w, of the contents that liz will ship to her friend if she must use a medium flat-rate box. use the drop-down menus to explain your answer.