Richard had 3 times as many CDs as Benny does if Richard has yCDs the number of CDs Benny has is given by the expression what expression

Which expression is equivalent to 3^3 + 2^2?

Carley bought a jacket that was discounted 10% off the original price. the expression below represents the discounted price in dollars, based on x, the original price of the jacket.

I’m still confused on how to work the percentages