Unoccupied seats at the Cardinal’s football stadium causes the football team to lose revenue. The Cardinal’s owner wants to estimate the mean number of unoccupied seats per game over the past few years. To accomplish this, the records of 225 games are randomly selected and the number of unoccupied seats is noted for each of the sampled games. The sample mean is 11.6 seats and the sample standard deviation is 4.1 seats. x-=

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

Pls! does anybody know a shortcut for answering these types of questions in the future?

It says factor each expression completely 8y+48