Which expression is equivalent to 3x−12y+223y−56x? a. 216x−216y b. 56x+216y c. 216x+216y d. 216x−56y

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.)

Lee has $1.75 in dimes and nickels. the number of nickels is 11 more than the number of dimes. how many of each coin does he have?

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?