Between which set of ordered pairs is the distance the least? (-1, -5) and (-1, -9)

(4, -7) and (2, -7)

(-5, 2) and (-2, 2)

(1, 9) and (6, 9)

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?

The sum of two numbers is 86, and their difference is 20. find the two numbers

60 2(x + 2) in the diagram, gef and hef are congruent. what is the value of x?