# 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

#### Quiz 1

Level up on the above skills and collect up to 400 Mastery points

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!

## Properties of matrix addition & scalar multiplication

#### Quiz 2

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## 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!

#### Quiz 3

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## 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!

## Model real-world situations with matrices

#### Quiz 4

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#### Unit test

Level up on all the skills in this unit and collect up to 1700 Mastery points!