Find the midpoint of the segment below

1.
If we are given 2 points A(a, b) and B(c, d), 

the midpoint M, of segment AB has coordinates:



2.
We are given the points A(2, 3) and B(10, 3)

the midpoint of AB, is given by the above formula:



3. 
Remark, since the segment is horizontal, that is the y-coordinate of both points is 3, the y coordinate of the midpoint will also be 3.

While the x coordinate is still found by 

(6, 3)

The shelves will hold 270 books in total