Final answer:
The business should purchase a system of equations that models the number of business-class and economy-class tickets it should buy.
Step-by-step explanation:
The correct answer is option D: 700x + 375y = 15,000 and x + y = 27.
To create a system of equations that models how many of each type of ticket the business should purchase, we can assign variables to represent the number of business-class tickets (x) and the number of economy-class tickets (y) the business should buy.
First, we know that the business has $15,000 to spend, and each business-class ticket costs $700. So, the cost of all business-class tickets would be 700x.
Next, we know that the number of employees attending the conference is 27. So, we can set up the equation x + y = 27.
Therefore, the system of equations that models how many of each type of ticket the business should purchase is:
700x + 375y = 15,000
x + y = 27