What is the simplest form of following expression?
7x2y – 7xy + 5xy2 – 5xy + x2y – xy2

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.)

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

What is the approximate value of  q  in the equation below? –1.613–1.5220.5853.079