Question:
The grocery store has 20% off from the original price on cereal. The equation for finding the sale price would be y = x - (.20x). What is the sale price if the cereal cost $4.00?
Answer:
The sales price is $3.20
Step-by-step explanation:
Given
[tex]y = Sales\ Price[/tex]
[tex]x = Cost[/tex]
[tex]y = x - (0.20x)[/tex]
Required
Determine y when x = 4.00
To do this, we simply substitute 4.00 for x in [tex]y = x - (0.20x)[/tex]
[tex]y = 4.00 - (0.20 * 4.00)[/tex]
[tex]y = 4.00 - 0.80[/tex]
[tex]y = 3.20[/tex]
Hence, the sales price is $3.20
