Anumber decreased by 5 is less than 32

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?

One integer is 8 times another. if the product is 72, then find the integers

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10