Three points determine a parabola, so given three points you can write the parabola's equation. This tutorial will show you how!
Plugging variables into an expression is essential for solving many algebra problems. See how to plug in variable values by watching this tutorial.
Solving an equation for a variable? Perform the order of operations in reverse! Check it out in this tutorial.
If you graph a linear function, you get a line. If you graph a quadratic function, you get something called a parabola. A parabola tends to look like a smile or a frown, depending on the function. Check out this tutorial and learn about parabolas!
There are many different ways to solve a system of linear equations. In this tutorial, you'll see how to solve such a system by combining the equations together in a way so that one of the variables is eliminated. Then, see how find the value of that variable and use it to find the value of the other variable. Take a look!