Problem
14 The regular price of an item at a store is \( p \) dollars. The item is on sale for \( 20 \% \) off the regular price. Some the expsions shown below represent the sale price, in dollars, of the item. Expression \( A: 0.2 p \) Expression B: \( 0.8 p \) Expression \( C: 1-0.2 p \) Expression \( D: p-0.2 p \) Expression \( E: p-0.8 p \) Which two expressions each represent the sale price of the item? A Expression \( A \) and Expression \( E \) B Expression B and Expression \( C \) C Expression B and Expression D D Expression C and Expression D
Solution
Step 1 ：\text{Sale price} = p - (0.2 \times p)
Step 2 ：= p(1 - 0.2)
Step 3 ：= 0.8 p
