Question

The regular price of an item at a store is p dollars. The items is on sale for 10% off the regular price. Some of the expressions below represent the sale price, in dollars, of the item.
Expression A: 0.1p
Expression B: 0.9p
Expression C: 1 - 0.1p
Expression D: p - 0.1p
Expression E: p - 0.0p
A Expression A and Expression E
B Expression B and Expression C
C Expression B and Expression D
D Expression C and Expression D

Answer 1

Answer:

C,    Expression B and Expression D

Step-by-step explanation:

Step 1 : Analyzing the question:

The regular price of an item at a store is p dollars. The items is

on sale for 10% off the regular price. Some of the expressions

below represent the sale price, in dollars, of the item.

It says  " item on sale for 10% off ". That means $p-0.1p$  or  $0.9p$.

Step 2 : Looking at the next portion of the question:

Expression A: 0.1p

Expression B: 0.9p

Expression C: 1 - 0.1p

Expression D: p - 0.1p

Expression E: p - 0.0p

Expression A doesn't make any sense. It only shows the how

much you save

Expression B:   This is one of the answer.

$p-0.1p=0.9p$

Expression C:  You can't subtract $0.1p$ from $1$

Expression D:  D makes sense.$p-0.1p=0.9p$

Expression E:   This is the same thing as $p$

Step 3: The answers:

The answer is C .