Cristobal took 3 hours to wash 5 cars. at this rate, how many card could he wash over a period of 45 hours?

How can we find the measure of an exterior angle if we know the measurement of an interior angle

Students are given 3 minutes for each multiple-choice question and 5 minutes for each free-response question on a test. there are 15 questions on the test, and students are given 51 minutes to take it. how many multiple-choice questions are on the test?

In each bouquet of flowers, there are 2 roses and 3 white carnations. complete the table to find how many roses and carnations there are in 2 bouquets of flowers.