This lesson explains the different types of notation used in describing solutions of graphs on number lines. Covers the basics as well as set and interval notation. Practice exercises and their solutions are also available to you.

A slideshow aimed at journalists to teach them the basic principles of framing a field of view and composing a shot.

"Northeast China - the provinces of Heilungkiang, Kirin, and Liaoning - is the most important region of the country and a nationally significant and still-developing center of agricultural production. Most of the Northeast remained...