# Matrices

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Lessons

Introduction to matricesRepresenting linear systems of equations with augmented matricesQuiz 1Elementary matrix row operationsRow-echelon form and Gaussian eliminationAdding and subtracting matricesQuiz 2Multiplying matrices by scalarsProperties of matrix addition & scalar multiplicationMultiplying matrices by matricesProperties of matrix multiplicationQuiz 3Matrices as transformationsThe determinant of a 2x2 matrixQuiz 4Introduction to matrix inversesFinding the inverse of a matrix using its determinantPractice finding the inverses of 2x2 matricesSolving equations with inverse matricesModel real-world situations with matricesUnit testPractice

Quizzes

Unit test

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Matrix row operations

4 questions

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Add & subtract matrices

4 questions

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Matrix equations: addition & subtraction

4 questions

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Multiply matrices by scalars

4 questions

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Matrix equations: scalar multiplication

4 questions

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Multiply matrices

4 questions

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Transform vectors using matrices

4 questions

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Transform polygons using matrices

4 questions

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Matrices as transformations

4 questions

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Determinant of a 2x2 matrix

75%

75%

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Find the inverse of a 2x2 matrix

4 questions

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**Matrices**with these 15 questions.About this unit

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 multiply matrices, and find the inverses of matrices.