The cost of an adult ticket to a football game is $2.00, and a student ticket is $1.50. The total receipts from 300 tickets were $550. How many tickets of each kind were sold?

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.)

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

Evaluate cos2θ for cosθ = square root of 3/2