Absolute value is basically the distance between "number" and "zero" on a number line. You will learn more about this concept in this video. You will also learn how to express absolute value functions as piecewise functions. [10:47]

When adding and subtracting rational expressions, the denominators of the expressions will dictate how we solve the questions. Learn more about subtracting rational expressions from this video, which includes detailed explanations and examples. [13:29]

This lesson discusses the advantages and disadvantages of using different types of graphs to display data, such as pictographs, line graphs, and bar graphs. [3:08]

An arithmetic sequence (arithmetic progression) is a number sequence with a common difference between successive terms. By using the arithmetic sequence formula, we can easily find the value of a term and the common difference in the sequence. Watch this video for a detailed explanation. [3:09]

An arithmetic series is the sum of an arithmetic sequence. In this video, you will learn how to solve problems using the arithmetic series formula. [10:50]

A polynomial consists of constants, variables, and exponents. Polynomials are named based on the number of terms they have. Watch this brief video introducing polynomials. [0:47]

Watch this video to learn what makes up a complex number, as well as how to plot on a complex plane. [5:45]

This video will teach you how to convert between radicals and rational exponents. It is a good idea to brush up on your understanding of all the basic rules of exponents before starting to watch the lesson. [0:32]

Watch this video lesson to learn how to convert from exponential form to logarithmic form. Practice problems included.

How do we convert log form to exponential form and vice versa? What's does converting log vs exponential form ultimately look like? Explore these questions through examples and a video. [1:03]

This video discusses coterminal angles which are angles that share the same terminal arms. [17:06]

Depending on whether and how the linear equations in a system touch each other, there will be a different number of solutions to the system. There can be one solution, no solution, and even infinite solution. Watch this video for examples. [3:40]

Tables and tree diagrams are useful tools to calculate probabilities. With them, you can list all the possible outcomes of an event in a clear and easy to understand way. Watch this video with an easy to understand example. [1:03]

The domain of a function is all the possible values of x's of ordered pairs; whereas the range of a function is all the possible values of y's of ordered pairs. You can easily find them by graphing the functions or ordered pairs. Let's see how in this lesson. Includes a video tutorial, examples, and practice problems.

In this lesson, you will learn how to make use of the double-angle identities, a.k.a. double-angle formulas to find the sine and cosine of a double angle. It's hard to simplify complex trigonometric functions without these formulas. [6:23]

When you are asked to make an object bigger or smaller, you will ask, "by how much?". In this case, scale factor can help answer the question. In this lesson, we will practice how to enlarge and reduce objects according to the scale factors given to us. A video tutorial is provided.

This video teaches you how to estimate square roots which are not perfect squares without using a calculator. Explanations and examples are included. [3:45]

Linear inequalities can be represented both graphically and algebraically. In this video, you will learn how to express linear inequalities as an equation and on a number line. [8:15]

In this lesson, we will learn how to find the quadratic function when we are given the graph of a parabola. Worked examples and a video are included. [8:22]