7. Jenelle buys shares of stock in a company at per share. She later sells the shares
   at per share. Write an equation to show how much money, , Jenelle has made.

To find out how much money Jenelle has made, you can use the following equation:

This equation calculates her profit by taking the total money she earns from selling the shares (the selling price times the number of shares) and subtracting the total money she spent on buying the shares (the buying price times the number of shares). Simplifying this, you can write it as:

which means her profit per share is dollars multiplied by the number of shares .

If Jenelle bought and sold multiple shares, remembering to clearly calculate her total profit is crucial. A common mistake here is forgetting to account for the total number of shares when doing the subtraction. Always double-check your operations and ensure that you’re correctly applying multiplication for total amounts to avoid leaving money on the table!