What is the error in this problem?

Rewrite the hyperbolic equation 4y^2 -9x^2 +54x-8y-113=0

Average salary for a medical assistant is $31,220 which is a 20% income tax bracket how much money would they pay in income tax?

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.)