Find the value of the polynomial 2x^3y^3+3xy−3x^3y^3+x^2y−xy+2x^2y, for x=−1 and y=2.

Need this asap if anyone can i would be very grateful. if you could show workings that would really

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?