9/28 simplified to it simplest form

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.)

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.