Write csc x in terms of sec x

Classify each polynomial by its degree and by its number of terms.

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

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?