Final answer:
To create an inequality based on the principal's budget of $400, use variables to represent the cost of food and transportation. The inequality is F + T ≤ 400.
Step-by-step explanation:
To create an inequality based on the principal's budget of $400, we need to consider the cost of food and transportation. Let's use variables to represent the cost of food (F) and transportation (T). The inequality can be written as: F + T ≤ 400. This means that the total cost of food and transportation cannot exceed $400.
For example, if the cost of food is $200, then the cost of transportation should be less than or equal to $200 to ensure the total cost is within the budget.