Which expression could be used to determine the cost of a $50 video game after a 20 percent discount?
$ 50(0.2)
$50-[($50) (0.08) ]
$ 50 - 0.8
$ 50(0.8)
$50 - ($50) (0.2)
The correct expression to determine the cost of a $50 video game after a 20 percent discount is $50(0.8).
The correct expression to determine the cost of a $50 video game after a 20 percent discount is:
$ 50(0.8)
To explain how this expression is derived, remember that a 20 percent discount can also be expressed as 0.20. Multiplying the original price ($50) by the decimal form of the discount (0.20) gives us the amount of money that is deducted from the original price. Hence, $50 multiplied by 0.20 equals $10.
To determine the final cost after the discount, we subtract the discount from the original price. Therefore, $50 minus $10 equals $40.
So, the correct expression $50(0.8) represents the process of taking 20 percent (0.8) off the original price ($50) to determine the discounted cost of the video game.