What is the difference of the polynomials?
(-2x^3y^2 + 4x^2y^3 - 3xy^4) - (6x^4y - 5x^2y^3 - y^5)

What is the sum of these mixed numbers 2 1/8 + 4 3/8

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

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