What percentage of 9a + 12 of 12a + 16

Adozen bananas weigh 3 pounds how many ounces does 1 banana weigh

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?

Dawn is selling her mp3 player for 3 4 of the original price. the original price for the mp3 player was $40. how much is she selling her mp3 player for?