What does the slope and the intercept mean in -3x +4y = 18

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.

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

X+y=-4 x-y=2 use elimination with adding and subtraction