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  1. Matrices | Algebra (all content) | Math | Khan Academy

    This topic covers: - Adding & subtracting matrices - Multiplying matrices by scalars - Multiplying matrices - Representing & solving linear systems with matrices - Matrix inverses - Matrix …

  2. Intro to matrices (article) - Khan Academy

    Matrix is an arrangement of numbers into rows and columns. Make your first introduction with matrices and learn about their dimensions and elements.

  3. Multiplying matrices by scalars (article) | Khan Academy

    A matrix is a rectangular arrangement of numbers into rows and columns. Each number in a matrix is referred to as a matrix element or entry. If this is new to you, you might want to check …

  4. Matrices | Precalculus | Math | Khan Academy

    Learn what matrices are and about their various uses: solving systems of equations, transforming shapes and vectors, and representing real-world situations. Learn how to add, subtract, and …

  5. Intro to matrix inverses (video) | Matrices | Khan Academy

    My brain is starting to slow down, having to do matrix multiplications with fractions with negative numbers. But this is a good exercise for multiple parts of the brain.

  6. Linear Algebra | Khan Academy

    Unit 2: Matrix transformations Functions and linear transformations Linear transformation examples Transformations and matrix multiplication Inverse functions and transformations …

  7. Matrix addition & subtraction (article) | Khan Academy

    What you will learn in this lesson As long as the dimensions of two matrices are the same, we can add and subtract them much like we add and subtract numbers. Let's take a closer look!

  8. Intro to matrix multiplication (video) | Khan Academy

    Matrix multiplication is a way of composing linear transformations, and the convention for matrix multiplication is designed to make this composition of linear transformations work correctly.

  9. Intro to matrices (video) | Matrices | Khan Academy

    What I want to do in this video is explore the notion of a matrix outside of the context of a surprisingly good movie that involves Keanu Reeves. And it's actually the first of three.

  10. Multiplying matrices (video) - Khan Academy

    Well, once you've got that 1000 by 3 matrix, there are very easy ways to manipulate it using matrix multiplication. Say you want to make your train 3 times bigger in the x direction and 1/2 …