A car drives eighty miles of seven gallons of gas. Determine the number of miles per gallon

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?

If f(x) = 2x + 2 and g(x) = x? , what is (gºf)(2)?

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?