# Matrices

## Introduction to matrices

Practice
Matrix dimensionsGet 3 of 4 questions to level up!
Matrix elementsGet 3 of 4 questions to level up!

## Representing linear systems of equations with augmented matrices

Practice
Represent linear systems with matricesGet 3 of 4 questions to level up!

## Elementary matrix row operations

Practice
Matrix row operationsGet 3 of 4 questions to level up!

## Row-echelon form and Gaussian elimination

Practice
Add & subtract matricesGet 3 of 4 questions to level up!
Matrix equations: addition & subtractionGet 3 of 4 questions to level up!

## Multiplying matrices by scalars

Practice
Multiply matrices by scalarsGet 3 of 4 questions to level up!
Matrix equations: scalar multiplicationGet 3 of 4 questions to level up!

## Multiplying matrices by matrices

Practice
Multiply matricesGet 3 of 4 questions to level up!

## Matrices as transformations

Practice
Transform vectors using matricesGet 3 of 4 questions to level up!
Transform polygons using matricesGet 3 of 4 questions to level up!
Matrices as transformationsGet 3 of 4 questions to level up!

## The determinant of a 2x2 matrix

Practice
Determinant of a 2x2 matrixGet 3 of 4 questions to level up!

## Introduction to matrix inverses

Practice
Determine inverse matricesGet 3 of 4 questions to level up!
Determine invertible matricesGet 3 of 4 questions to level up!

## Practice finding the inverses of 2x2 matrices

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Practice
Find the inverse of a 2x2 matrixGet 3 of 4 questions to level up!