I need help to solve the equation

In the diagram of circle a what is m

For which of the following counts would a binomial probability model not be reasonable? a)the number of people in a classroom born in januaryb) the number of people in a classroom with red hair c) the number of people admitted to a hospital in a day with a particular disease d) the number of heart beats in a one-minute perio.

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2