Algebra I on Khan Academy: Algebra is the language through which we describe patterns. Think of it as a shorthand, of sorts. As opposed to having to do something over and over again, algebra gives you a simple way to express that repetitive process. It’s also seen as a “gatekeeper” subject. Once you achieve an understanding of algebra, the higher-level math subjects become accessible to you. Without it, it’s impossible to move forward. It’s used by people with lots of different jobs, like carpentry, engineering, and fashion design. In these tutorials, we’ll cover a lot of ground. Some of the topics include linear equations, linear inequalities, linear functions, systems of equations, factoring expressions, quadratic expressions, exponents, functions, and ratios.

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This is just a few minutes of a complete course. Get full lessons & more subjects at: http://www.MathTutorDVD.com. In this lesson we discuss the concept of the derivative in calculus. First, we will discuss what is a derivative in simple terms and work numerous derivative examples. Next we will explain how derivatives work in calculus…

Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/precalculus/vectors-precalc/magnitude-direction/e/vector-word-problems?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus Watch the next lesson: https://www.khanacademy.org/math/precalculus/vectors-precalc/magnitude-direction/v/vector-component-in-direction?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus Missed the previous lesson? https://www.khanacademy.org/math/precalculus/vectors-precalc/magnitude-direction/v/adding-displacement-vectors?utm_source=YT&utm_medium=Desc&utm_campaign=Precalculus Precalculus on Khan Academy: You may think that precalculus is simply the course you take before calculus. You would be right, of course, but that definition doesn’t mean anything unless you have some knowledge of what…

There are some situations that are useful to learn to parameterize. We commonly parameterize line segments, and require knowledge of the starting and ending positions. In order to understand how to parameterize line segments, students should understand the concept of parametric equations. The tools we use to parameterize a line can be useful when understanding…