Is 15/35 less than equal then greater than 12/20

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

What expression is equivalent to 1/2(2+3x-6)

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