Question

1. a jersey is on sale for 10% off. find the sale price if the original price of the jersey was $100.

Explanation:

Step1: Calculate the discount amount

The discount is 10% of the original price. The formula for the discount amount \( D \) is \( D=\text{Original Price} \times \text{Discount Rate} \). Given the original price is $100 and the discount rate is 10% (or 0.10 in decimal), so \( D = 100\times0.10 \).
\( D = 10 \)

Step2: Calculate the sale price

The sale price \( S \) is the original price minus the discount amount. So \( S=\text{Original Price}-D \). Substituting the values, we have \( S = 100 - 10 \).
\( S = 90 \)

Answer:

The sale price of the jersey is $90.