Knot theory is beyond cool! This speed demon video will show you three very cool math doodle games, which demostrate principles of knot theory. By the time you finish watching it once or twice, you’ll probably get hooked on these very cool knot doodle pasttimes and learn a thing or two along the way.

- The Know Plot site
- Knots at Cut The Knot
- Knot Theory
- Knots – an Interactive Demonstration at Wolfram Alpha

In math a root of a funtion is where the function equals zero (0).

]]>

Factors are numbers that you can multiple together to get another number.

Whether you are checking your work for simple factors, or for more complicated factors of quadratic equations, we can help with the following

The number π is a mathematical constant that is the ratio of a circle’s circumference to its diameter. Calculated to the 5th decimal it is approximately equal to 3.14159

**How many digits of Pi** would you like to see? With this great little calculator powered by Wolfram, you can specify the number of digits, and the calculator will show you Pi to that degree. Very cool math tool to work on memorizing Pi to a particular digit.

]]>

This video is brought to you by JStone with our compliments

**Matrix Algebra Worksheet**from Professor Kowalski at SD School of Mines & Technology.**Matrix Algebra and Inverses Worksheet**from UC Berkeley**Linear Systems and Matrices**is a great set of videos and worksheets from Niles West High School.

This video is courtesy of Yay Math! (YouTube)

]]>This video is courtesy of Mrs Lawler Math (YouTube)

]]>This video is courtesy of Yay Math! (YouTube)

]]>Video courtesy of Denise Robichaud (YouTube)

]]>To solve a system of linear equations, we can use substitution, elimination or something we call augmented matrices. To use matrices to solve a system of linear equations, we first enter the values associated with each of the variables and the answer. Once we put the information into a matrix (a rectangular array of numbers), we can use matrix operations to solve the equation.

Video Courtesy of Mr. Green of Nutshell math.

**Elements**: Each of the entries in the augmented matrix**Rows**: The numbers or variables that run across the matrix.**Columns:**The numbers or variables that run down the matrix.**The diagonal of the matrix:**The set of elements that starts at the top, left corner and runs diagonally down and to the right. (This diagonal: 2, -1 and 4.)