Clara has pennies and quarters in her purse. she counts a total of 28 coins. if the total value of the coins is 76 cents, which system of equations can be used to determine the number of pennies and the number of quarters? assume p represents the number of pennies and q represents the number of quarters.

The head librarian at the library of congress has asked her assistant for an interval estimate of the mean number of books checked out each day. the assistant provides the following interval estimate: from 740 to 920 books per day. what is an efficient, unbiased point estimate of the number of books checked out each day at the library of congress?

What is the distance between the points (2, 5) and (5,9)?

Select the correct answer and solve for y