How to solve for a triangle with only an angle and side length?

What is an alternate exterior angle

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?

Write as a product: ac^2–ad+c^3–cd–bc^2+bd