Verify whether these two functions are inverses:

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.

Two consecutive negative integers have a product of 30. what are the integers?

Keith runs 5 miles in 38 minutes. at the same rate, how many miles would he run in 57 minutes