Help me pls. Thank u sk much

What is the product? (x2+3y+7) [yy+1)

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°?

Given δjkl : δxyz, find x. a)10 b)12 c)16 d)20