What properties allow transformation to be used as a problem solving tool

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles

Find the value of x for which the lines are parallel.

Twenty points. 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