Question

Dwayne wants to buy a bowling ball that has a price of $120. As a member of a bowling league, he is entitled to a 15% discount off the price of the bowling ball. He will also have to pay 6% sales tax on the discounted price of the bowling ball. Dwayne thinks that the final price of the bowling ball can be determined by taking 9% off the original price. Is Dwayne correct? Support your answer with a detailed explanation.

Answer 1

No, because
$120-15%=$102
$102+%6=$108.12

so %6 represents tax
and 15% is his discount

if you were to take away %9 then you would get $109.20
$120-9%=109.20
so Dwayne is incorrect, because $108.12 ( his true final price) isn't equal to $109.20 (the price it would be if it was 9% off)

I hope this helps!