Since p(x) = r(x) - c(x), we can plug in r(x) and c(x) to find p(x). p(x) = 11x - (6x + 20) Make sure that your problem is subtracting all of c(x) and distribute the subtraction. p(x) = 11x - 6x - 20 p(x) = 5x - 20 After simplifying, the final answer is D.
If r(x)= 11x, and c(x)=6x +20, then just put that into the equation. So instead of p(x) = r(x) - c(x) I would be p(x) = 11x - 6x + 20 Now solve. p(x) = 5x + 20 is your final answer, so A.
