Expand 5x(2x-5) im new plz answer dis xd

6n^2-7n-75=0 solve by quadratic formula

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.

Astore has clearance items that have been marked down by 60%. they are having a sale, advertising an additional 55% off clearance items. what percent of the original price do you end up paying?