Lynette is selling tickets to a choral performance. She is selling senior citizen tickets and adult tickets. She sold a total of 10 tickets. Senior tickets cost $5 each and adult tickets cost $8 each. Lynette sold a total of $71 worth of tickets. If x is the number of senior tickets and y is the number of adult tickets sold, which system of linear equations models this situation?

Michelle and julie work at a catering company. they need to bake 264 cookies for a birthday party that starts in a little over an hour and a half. each tube of cookie dough claims to make 36 cookies, but michelle eats about 1/5 of every tube and julie makes cookies that are 1.5 times as large as the recommended cookie size.it takes about 8 minutes to bake a container of cookies, but since julie's cookies are larger, they take 12 minutes to bake. a. how many tubes should each girl plan to bake? how long does each girl use the oven? b. explain your solution process what did you make? c. what assumptions did you make?