At Hillgrove, 60 percent of the students carry a backpack or a wallet. 40 percent carry a backpack, and 30 percent carry a wallet. if a student is selected at random, find the probability that the student carries both a backpack and a wallet.

Each of the walls of a room with square dimensions has been built with two pieces of sheetrock, a smaller one and a larger one. the length of all the smaller ones is the same and is stored in the variable small. similarly, the length of all the larger ones is the same and is stored in the variable large. write a single expression whose value is the total area of this room. do not use any method invocations.

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?