The curve formed by a quadratic equation is called a

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?