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.

Question

Geovanni Wilkerson

Mathematics

7 June, 06:20

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.

+5

Answers (1)

Know the Answer?

Edwin Dorsey · Answer 1

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.