Khan Academy
Khan Academy: Finding Inverses of Matrices: Formula for 2 X2 Inverse
Figuring out the formula for a 2x2 matrix. Defining the determinant.
Khan Academy
Khan Academy: Basic Matrix Operations: Matrix Addition and Subtraction
Adding and subtracting matrices.
Sophia Learning
Sophia: Using Elementary Row Operations to Solve for Systems of Equations
This video lesson demonstrates how to solve a system of linear equations by using matrix row operations. Students can check their understanding with an assessment.
Khan Academy
Khan Academy: Inverting Matrices: Inverse of a 2 X2 Matrix
Example of calculating the inverse of a 2x2 matrix.
Khan Academy
Khan Academy: Solving Systems by Elimination: Reduced Row Echelon Form 1
Video shows how to use matrices and reduced row echelon form to simplify a system of 3 equations in 4 variables.
Khan Academy
Khan Academy: Inverting 3 X3 Part 2: Determinant and Adjugate of a Matrix
This is part two of video about 3x3 matrix inversion.
Khan Academy
Khan Academy: Solving a System of 3 Equations and 4 Variables Using Matrix
Sal solves a linear system with 3 equations and 4 variables by representing it with an augmented matrix and bringing the matrix to reduced row-echelon form.
Sophia Learning
Sophia: Using Determinants to Classify 2x2 Matrices
This lesson demonstrates how the determinant of a 2x2 matrix can be used to tell whether or not the matrix represents a dependent linear system, an inconsistent linear system, or neither.
Sophia Learning
Sophia: Writing Systems of Equations With Augmented Matrices #3
This lesson demonstrates how to write systems of equations as augmented matrices.
Sophia Learning
Sophia: Solving a System of Linear Equations
In this lesson, students will learn Solving a System of Linear Equations given Cost and Quantity Relationships
Sophia Learning
Sophia: Using Determinants to Classify 3x3 Matrices: Lesson 4
This lesson demonstrates how the determinant of a 3x3 matrix can be used to tell whether or not the matrix represents a dependent linear system, an inconsistent linear system, or neither.
Sophia Learning
Sophia: Writing Systems of Equations With Augmented Matrices: Lesson 1
This lesson demonstrates how to write systems of equations as augmented matrices. It is 1 of 5 in the series titled "Writing Systems of Equations with Augmented Matrices."
Sophia Learning
Sophia: Writing Systems of Equations With Augmented Matrices: Lesson 2
This lesson demonstrates how to write systems of equations as augmented matrices. It is 2 of 5 in the series titled "Writing Systems of Equations with Augmented Matrices."
Sophia Learning
Sophia: Solving a System of Linear Equations Given Two Cost Relationships
In this lesson, students will learn Solving a System of Linear Equations given two Cost Relationships