When you multiply a matrix and its inverse together, you get the identity matrix! Follow along with this tutorial to practice finding the inverse of a 2x2 matrix.
To multiply a matrix by a scalar, just multiply each element in the matrix by the scalar! To see the entire process, check out this tutorial!
Determining the determinant of a matrix can be fun, especially when you know the right steps! This tutorial provides a great example of finding the determinant of a 2x2 matrix.