Question

$1300 bedroom suit that is on sale for 20% off if the sales tax is 9%

Answer 1

$1133.60 after that 20% discount and with that 9% tax included

Explanation:

The sale price is (1.00-0.20)($1300) = 0.80($1300).

With sales tax included, that would come to (1.09)(0.80)($1300) = $1133.60. This is the price you'd pay for that bedroom suite.