State whether each expressions is a sum pr difference of two cubes: 1. x^3 - 1/8

2. x^6y^3 + z^9

3. 3x^3 -1

4. 27x^15 + y^4

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

Which of the following three dimensional figures has a circle as it’s base