Answer:the price of the stock at closing on Wednesday is $10
Explanation:
On Monday a stock sold for $12 a share at closing. On Tuesday the selling price for the stock was down $3 a share at closing. This means that the amount at which the stock sold a share at closing on Tuesday is 12 - 3 = $9
On Wednesday the price of the stock at closing was up $1 from Tuesday. This means that the amount at which the stock sold a share at closing on Wednesday is
9 +1 = $10