Answer: [tex]g-13[/tex]
Step-by-step explanation:
You must analize the information provided in the exercise.
You know that Zach's grade on a quiz is represented with:
[tex]g[/tex]
Notice that, acccording to the information in the exercise, Helen made 13 points lower on that quiz than Zach. Then, Helen's grade on that quiz can be calculated by subtracting Zach's grade on the quiz and 13 points.
Therefore, based on this, you can write the following expression in order to represent Helen's grade on that quiz:
[tex]g-13[/tex]
