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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Video explanations to all of the questions in the Precalculus section of 2019 CLEP Official Study Guide by Collegeboard. Book available on Amazon: https://amzn.to/2IQJ63h

This video tutorial provides a basic intro into trigonometry. It explains how to evaluate trigonometric functions like sin, cos, and tan using soh cah toa and right triangle trigonometry. It explains how to use reference angles and coterminal angles to evaluate trig functions such as sec, csc, and cot. New Trigonometry Playlist: https://www.youtube.com/watch?v=oxhXz9_uyiM&index=1&list=PL0o_zxa4K1BVCB8iCVCGOES9pEF6byTMT Access to…

This algebra video tutorial explains how to solve upstream and downstream problems such as distance rate time word problems. This first question asks you to solve for the speed of the boat in still water given the time it takes to travel upstream and downstream and given the speed of the river / water current…