If x = -2 and y = 3, by how much does 2y2 - x exceed 2x2 - y?

Cynthia takes her dog to the park every 2 days. she bathes her dog every 7 days. if she took her dog to the park and bathed him today, how long will it be until she does both on the same day again?

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.