Let p= -3, q= -1 and r=2. evaluate 3r2 - 2qp

Asphere has a diameter of 10 in. what is the volume of the sphere?

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?

Two cyclists 84 miles apart start riding toward each other at the samen time. one cycles 2 times as fast as the other. if they meet 4 hours later what is the speed (in miles) of the faster cyclists