Arrange the systems of equations that have a single solution in increasing order of the x-values in their solutions. 2x + y = 10
x − 3y = -2

x + 2y = 5
2x + y = 4

x + 3y = 5
6x − y = 11

2x + y = 10
-6x − 3y = -2

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 many grams the dog will eat in 3 days?

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length