Khan/khan-exercises — pull request #46041 by kolive (2013-05-21 20:57:56+00:00)
Title: Absolute value inequalities Exercises

Created some exercises for the Absolute Inequalities video.
Three problem types:
-Simple Inequality with no x-shift using a number line.
-- Student must outline a range on an interactive numberline that is the solution to an inequality.
- Inequality with x-shift using a number line.
- Inequality with x-shift and scalars algebraically.
-- Student must solve an inequality and enter the rational solutions.

Added a util file which contains some helpers for drawing and making interactive numberline segments.