Help please I would really appreciate it my teacher makes us show our work cause it’s honors

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

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.

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=