One tool used throughout Algebra, Trigonometry, and Calculus is a graphing calculator. One thing using a graphing calculator is helpful for is solving systems of equations. We can solve systems of linear equations by using a graphing calculator and matrices. We can also solve systems of nonlinear equations by using a graphing calculator to graph their equations and find the intersection.
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How to add matrices.
How to multiply matrices by a scalar multiple.
Adding and subtracting matrices as a method of organizing multiple sets of values in a word problem