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1 March, 11:30

Martha has $20 to spend on a t-shirt. She has a coupon for 20% off. The t-shirt regularly sells for $22.50 plus 10% sales tax.

Choose all that correctly compute the cost of the t-shirt.

Martha takes 20% of $22.50 and subtracts that amount from the regular price. She takes 10% of the discounted selling price and adds it back to find the purchase amount.

Martha takes the difference between the 20% discount and the 10% sales tax and subtracts 0.10 from 1, and then multiplies that by the regular price.

Martha takes 80% of the regular purchase price of $22.50, and then computes 110% of the reduced price.

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Answers (1)
  1. 1 March, 11:52
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    1 and 3

    Step-by-step explanation:

    Step 1 is clearly elaborated. Tax is impliedd on the discounted price.

    In step 3, the steps of deductions are skipped.

    Like 1 + 10% = 110% and 1 - 20% = 80%

    Step 2 is simply wrong. Because the percentages are implied on different values.
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