What are we going to do with these matrices now that we've made them our faithful servants? Use them to solve equations, that's what. We'll add 'em, we'll subtract 'em, and we'll stare at 'em. Why...

Adding, Subtracting, and Matrices, Oh My!It's simple to add and subtract matrices, but they must always be the same size for it to work. The answers are always the same size too. Check it out:All...

Since we're so awesome at adding and subtracting matrices—not to mention Cramer's Rule—it's time to double our pleasure and double our fun with multiplication. Press on.

Inverse Matrices At this point, you may be wondering why the Fourth Horseman of the Math Apocalypse, division, seems to be getting overlooked. Well, the fact is that you can't do division with...

Let's say you're working at A & F in the mall. You're in charge of shirts, because your manager thinks you have real promise. Don't let her down!First, you're doing an inventory of red polo shi...