12 11
10
9
8
7
6
5
4
3
2
-12-11-10-9-8-7-6 -5 -4 -3 -2 -1
1 2
3 4 5 6 7 8 9 10 11 12
-2
-3
-4
-5
O
-7
-8
-9
-10
-11
-12

What is the value of the digit 1 in the number 13?

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 first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103