Divide twice the variable p by the product of 5 and q

Which expression is equivalent to (9x - 3 1/ + 1 3/8)

Evaluate cos2θ for cosθ = square root of 3/2

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