What is the product of (2/5x-3/4y^2) and (2/5x+3/4y^2)?

Is a positive integer raised to a negative power always positive

Polygon hh is a scaled copy of polygon gg using a scale factor of 1/4. polygon h's area is what fraction of polygon g's area?

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?