-3(5x-10)=[?]x + [ ]

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.

Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"