Dwayne wants to buy a bowling ball. As a member of a bowling league, he receives a 15% discount on the price of the bowling ball. He will also have to pay a 6% sales tax on the discounted price of the bowling ball. Dwayne thinks that the final price of the bowling ball can be represented by the expression , which is equivalent to , so Dwayne says he can find the final price after tax by .15x .06xx−0 +0.09x x−0taking 9% off of the original price. Dwayne’s friend, Raul, thinks that you need to take 9.9% off of the original price because is .06 1 (0.85x) equivalent to , which is . .901x 0.099xx−0 Who is correct – Dwayne or Raul? Explain your reasoning.
