To make 5 apple pies, you need 2 pounds of apples. how many pounds of apples would you need to make 20 pies?

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?

Prove the converse of the pythagorean theorem using similar triangles. the converse of the pythagorean theorem states that when the sum of the squares of the lengths of the legs of the triangle equals the squares length of the hypotenuse, the triangle is a right triangle. be sure to create and name the appropriate geometric figures.