What is the difference of the following polynomials?

(6x^3-2x^2+4)

-(2x^3+4x^2-5)

4x^3-2x^2-1
8x^3+6x^2-1
4x^3-2x^2+1
4x^3-6x^2+9

With these: 18/36 = 1/? missing number change 1 5/8 to improper fraction. change 19/5 to a mixed number.

Acylinder has volume 45π and radius 3. what is it’s height?

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.)