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).

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.