Can someone point me to another dimension?

[purnell]

We rely on our senses, and we can only perceive the three spatial dimentions plus the linear passage of time.

If you use linear algebra to solve "real-world" problems, then all you have to do is add another equation/unknown, and suddenly you're working with an extra dimention. We just have a real hard time visualizing it because our brains are wired for this world.