8. Myles had 103 coins in a jar - all nickels, dimes, and quarters. If the total value of the coins is $15 and he has three more quarters than dimes, use an inverse matrix to determine the number of
each type of coin.

At the beginning of a call to the cable company, a message tells customers, "after you finish talking to our customer service representative, you will be asked to take a five-question survey about the level of service you recieved. it would be appreciated if you could stay on the line to answer the survey questions." what type of sampling is the cable company using?