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Linear Algebra: Matrices

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More Lessons for Vectors
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A series of linear algebra lectures on matrices in videos by Khan Academy.

Using Matrices to Solve a System of Equations

Using the inverse of a matrix to solve a system of equations.

Using Matrices to Solve a Vector Combination Problem

Using matrices to figure out if some combination of 2 vectors can create a 3rd vector.




Singular Matrices

When and why you can't invert a matrix.



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Add and subtract fractions to make exciting fraction concoctions following a recipe. There are four levels of difficulty: Easy, medium, hard and insane. Practice the basics of fraction addition and subtraction or challenge yourself with the insane level.

Fraction Concoction Game


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