Question

The cost of producing x soccer balls in thousands of dollars is represented by h(x) = 5x + 6. The revenue is represented by k(x) = 9x – 2. Which expression represents the profit, (k – h)(x), of producing soccer balls?

Answer 1

(9x-2) - (5x+6) =

4x-8 , this is your profit function

Answer 2

(k - h)x = k(x) - h(x)
            =  9x -2 - (5x + 6)
             = 9x - 5x -2 - 6
             =  4x - 8