I don't understand this type of stuff so plz if u know what the answer is otherwise don't comment

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°?

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x