David bought 3.5 pounds of potatoes for $0.82 per pound. How much did David spend on potatoes?

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.)

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?