Help with math problems

Classify each polynomial by its degree and by its number of terms.

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

Four individuals pool money together to start a new business and agree to split the profits equally. n invests $6,000, x invests $2,000, y invests $8,000 and z invests $4,000. if the profits for the first month were $100,000, y receives than if the profits were divided in proportion to how much they invested.