Answer:
You can buy a maximum number of 11 boxes
Step-by-step explanation:
The first step is to calculate the number of boxes that you can afford with the $150 without the discount. This can simply be done by dividing $150 by $15
= 10 boxes.
The next step is to calculate the effect of the discount on the total of $150. The $25 discount will increase your average sum to $175. This extra $ 25 can afford you one more box. bringing the total number of boxes to 11.
You can buy a maximum number of 11 boxes