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?

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?