What is the interpretation

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.

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?