Reference Topics 17-2

This site by the American Mathematical Society gives an excellent overview of voting and elections.
http://www.ams.org/featurecolumn/archive/voting-introduction.html

This site gives some references to Arrow’s Impossibility Theorem:
http://mathworld.wolfram.com/ArrowsParadox.html

You can use this site to find real-life examples of voting dilemmas:
http://www.archives.gov/

This … See the whole entry

Reference Topics 16-4

This is an interactive site discussing matrix operations:
http://www.mathportal.org/calculators/matrices-calculators/matrix-operations-calculator.php

This is an interactive site finding inverse matrices:
http://www.mathportal.org/calculators/matrices-calculators/matrix-calculator.php

This is a nice matrix operation site which also includes Gauss-Jordan elimination:
http://matrix.reshish.com/inverse.phpSee the whole entry