How do i find out the square inches pic above

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2

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

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2