Given:
Mary is paid $12 per hour at her weekend part-time job.
She earns an average of $132 each weekend, but her earnings can vary by $36.
To find:
The inequality for number of hours.
Solution:
Let h be the number of hours Mary could work in one weekend.
Total earning for h hours = $12h
She earns an average of $132 each weekend, but her earnings can vary by $36. So,
Divide all sides by 12.
Therefore, the correct option is D.