1. 5 3/4+("-" 1/4)

2. "-" 2/3+1/6

3. "-" 8/5+("-" 3/4)

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?

How are algebraic expressions evaluated using substitution?

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?