Ruben bought a DVD recorder for 240 $. Now, it is on sale for 180 $. Find the percentage of change in the price

Add or subtract polynomial : –12qr? +13rq?

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

Arestaurant offers a $12 dinner special that has 5 choices for an appetizer, 12 choices for an entrée, and 4 choices for a dessert. how many different meals are available when you select an appetizer, an entrée, and a dessert? a meal can be chosen in nothing ways. (type a whole number.)