Help me with this problem please?

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

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.

25 ! the line of best fit is h = 5a + 86. predict the height at age 16. show your work.