Angie, Andrew, Nicola and Heather are 7th grade teachers and they are going to divide 8 1/2 pounds of cookies between their 21 star students and themselves. What fraction of the 8 1/2 pounds of cookies will each person get? (answer must be in simplest form)

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.