Which system of equations has exactly one solution? 2 x y = 3. 5 x minus y = 11. 2 x 2 y = 1. Negative 2 x minus 2 y = 1. 3 x y = negative 1. 6 x 2 y = negative 2. 3 x minus 2 y = 4. Negative 3 x 2 y = 4.

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