What are the factors of the expression 3x(y+5)

When you are making a circle graph by hand, how do you convert a number for a part into its corresponding angle measure in the circle graph? when you are making a circle graph by hand, what should you do if one of your angle measures is greater than 180°?

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?

Can some one me with these questions