# Math 1090 (Business Algebra) Lecture Videos

These lecture videos are organized in an order that corresponds with the current book we are using for our Math1090 courses. We have numbered the videos for quick reference so it's reasonably obvious that each subsequent video presumes knowledge of the previous videos' material. Along with the video lecture for each topic, we have included the "pre-notes" and "post-notes" which are the notes of the lecture before we did the problems and after we worked everything out during the lecture, respectively. You may want to download the notes to use as a reference while watching the lecture video, or for later reference.If you find an error in the lecture or a problem with the video, or if you would like to give feedback to us about these lectures, please email macarthur@math.utah.edu to do so.

**NOTE: These videos were not recorded in stereo sound. If you are listening to these videos on headphones, you may want to consider setting your sound channels to come through both sides. This document will give you an idea of how to accomplish that.**

- Decimals and Fractions lecture video
- Operations with Fractions lecture video
- Rules of Exponents lecture video
- 1.1 Linear Equations in One Variable

- 1.2 Linear Inequalities in One Variable

- 1.3 Equations of Lines

- 1.4 Systems of Linear Equations

- 1.5 Functions

- 1.6 Linear Business Applications

- 1.7 Linear Inequalities in Two Variables

- 1.8 Graphical Linear Programming

## Chapter 2: Matrices

- 2.1 Basic Operations with Matrices

- 2.2
Matrix Multiplication

- 2.3A Gauss-Jordan Elimination (part 1)
- 2.3B Gauss-Jordan Elimination (part 2)

- 2.4 Inverse Matrices

- 2.5 Application Problems with Matrices

## Chapter 3: Functions and Graphs

- 3.1 Quadratic Equations in One Variable

- 3.2 Parabolas: Quadratic Equations in Two Variables

- 3.3 Quadratic Business Applications

- 3.4A Polynomial Functions (part 1)
- 3.4B Polynomial Functions (part 2)

- 3.5 Rational Functions

- 3.6 Transformations of Graphs

- 3.7 Combinations of Functions

## Chapter 4: Exponential and Logarithmic Functions

- 4.1 Inverse Functions

- 4.2 Exponential Functions

- 4.3 Logarithmic Functions

- 4.4 Properties of Logarithms

- 4.5 Logarithmic and Exponential Equations

- 4.6 Logarithmic and Exponential Business Applications

## Chapter 5: Mathematics of Finance

- 5.1A Arithmetic and Geometric Sequences (part 1)
- 5.1B Arithmetic and Geometric Sequences (part 2)

- 5.2 Simple and Compound Interest

- 5.3 Future Value of Annuities

- 5.4 Present Value of Annuities

- 5.5 Amortization and Loans

These videos were completed as a collaborative effort of Marilyn Keir and Kelly MacArthur, funded and supported by the Mathematics Department at the University of Utah.

## Review Lecture Videos

Also, if you feel you need more review of Intermediate Algebra topics, i.e. the prerequisite material, please feel free to see the lecture videos and/or notes for that course here.