Charmaine has scored 98, 66, 74, and 70 on her previous four tests. What score does she need on her next test so that her average (mean) is 77?

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

1jessica's home town is a mid-sized city experiencing a decline in population. the following graph models the estimated population if the decline continues at the same rate. select the most appropriate unit for the measure of time that the graph represents. a. years b. hours c. days d. weeks

Askate shop rents roller skates as shown on the table below. which graph and function models this situation?