From 2000 to 2015, the number of births, b. (in the hundreds) in Fairfield County can be modeled by the function bx) = 300 - 5x. The number of deaths, d, in the hundreds) can be modeled by the function d(x) = 10x + 5. The variable x represents the number of years since 2000. a. Which function operation can be used to represent the net increase in the population?

b. Write and simplify a function which represents the net increase in the population, p, against x, the number of years since 2000. State the domain of this function.​