Have you ever baked cookies from scratch? They require many ingredients in different amounts. Other baked items, such as banana bread, use similar ingredients to make a very different product. Consider these two ingredients lists:

Acollege is selling tickets for a winter fund-raiser. one day, krissa sold 14 adult tickets and 8 student tickets for a total of $376. the next day, she sold 7 adult tickets and 11 student tickets for a total of $272. krissa wanted to find the price of one adult ticket, a, and the price of one student ticket, s. she wrote and solved the following system of equations.