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Maria bought a stock for x dollars, and she sold it at a profit of 20 %. Write a mathematical expression for the selling price.

120x
1.2x
0.12x
12x

1 answer

To find the selling price of the stock after a 20% profit, you can use the following steps:

  1. Identify the original price of the stock, which is \( x \) dollars.
  2. A profit of 20% on \( x \) is calculated as \( 0.20x \).
  3. Therefore, the selling price would be the original price plus the profit:

\[ \text{Selling Price} = x + 0.20x = 1.20x \]

So, the correct mathematical expression for the selling price is:

1.2x