Richard is hiring workers to paint the walls of his house. The cost of painting x square feet of wall is given by the function f(x) = 1.5x + 6, where f(x) represents the cost in dollars.

The total number of walls of equal area that Richard needs to get painted is given by the function g(x) = 5.

Determine the equation for h if h(x) = f(x) · g(x).