4. Lin's family buys 2 adult tickets and 2 child tickets for $26. Mike's family buys
2 adult tickets and 3 child tickets for $31.
Which system represents the situation?
(2x + 2y = 26
А
2x + 3y = 31
S2x +2y = 31
B
2x + 3y = 26
2x + 31= 2y
с
2x + 26 = 3y

The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distributed with a mean of 12611261 chips and a standard deviation of 118118 chips. (a) determine the 2626th percentile for the number of chocolate chips in a bag. (b) determine the number of chocolate chips in a bag that make up the middle 9696% of bags. (c) what is the interquartile range of the number of chocolate chips in a bag of chocolate chip cookies?