Final answer:
Margaret will have to pay $114 for the dress after applying the 5% discount off the original price of $120.
Step-by-step explanation:
To calculate the amount Margaret has to pay for a dress originally priced at $120 with a 5% discount, we first determine the amount of the discount. To do this, convert the percentage to a decimal and then multiply by the original price.
Amount of discount: $120 Ă— 0.05 = $6
Next, subtract the discount from the original price to find the sale price.
Sale price: $120 - $6 = $114
So, Margaret will have to pay $114 for the dress after the red tag sale discount is applied.