Which of the following rational function is graphed below

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.

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Hurry which expression is equivalent to 3√x^5y?