Simplify when x=4 4x/2x^2

Two sides of a triangle mesure 20cm and 30cm. what is the measure of the third side

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?

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a.p.