Find the product of - 9+7 and its complex conjugate.

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

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is

Proving the congruent supplements theorem