Answer: D) x - 0.2 x also describes the discounted price, in dollars, of the hat.
Explanation:
Since, the marked price of the hat = x,
The percentage discount on the price of the hat = 20 %,
Thus, the discount = 20 % of the marked price
= 20 % of x
= 0.2 x
Hence, the new price of the hat = Marked price - Discount
= x - 0.2 x
Which is the required expression which is equivalent to 0.8x.