Yvaries directly with x. if y is 45 when x is 15; what is y when x is 5

Asmall car averages up to 29 more miles per gallon of gas that an suv. if a small car averages 44 miles per gallon, what is the average miles per gallon for an suv?

A20? -foot ladder is placed against a vertical wall of a? building, with the bottom of the ladder standing on level ground 19 feet from the base of the building. how high up the wall does the ladder? reach?

The sum of two numbers is 12 and their difference is 18 what are the two numbers