If you don't like the base of a logarithm, you can change it using the Change of Base Formula! This tutorial explains the Change of Base Formula for logarithms and how to use it.
You can't do algebra without working with variables, but variables can be confusing. If you've ever wondered what variables are, then this tutorial is for you!
If you ever plug a value in for a variable into an expression or equation, you're using the Substitution Property of Equality. This property allows you to substitute quantities for each other into an expression as long as those quantities are equal. Watch this tutorial to learn about this useful property!
Got an equation with two variables? Want to solve for one variable in terms of the other? Want to go the other way around? See how in this tutorial!
Sometimes you'll see a number with an exponent raised to another exponent, and the first time you see it, you probably think it's a typo! But it's not a typo, it's a real thing, and there's a really nice trick for making it simpler that you'll see in the video.
Looking at an equation with a variable in the exponent? You have an exponential function! Learn about exponential functions in this tutorial.
If you want to find the answer to a logarithm, it can be helpful to change the logarithm so it has the common base of 10. To do that, you need to use the Change of Base Formula. This tutorial shows you how to take a logarithm and rewrite it as a common logarithm.