Ireally need on this algebra question:
when the expressions x squared - 9 and x squared - 5x - 6 are factored, a common factor is:
1) x+3
2)x-3
3)x-2
4)x squared

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?