Someone help me please

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

Fast! find the length of cu. the triangles are similar. show your work.

Tommy buys a sweater that is on sale for 40% off the original price. the expression p -0.4p can be used to find the sale price of the sweater, where p is the original price of the sweater. if the original price of the sweater is 50, what is the sale price?