<p>there was a matrix problem in my princeton review sat book</p>
<p>They definitely did not show up when I took the test. Although, they could be helpful in a difficult system of equations problem.</p>
<p>There could be. Matrix is part of Algebra II, so it might be on the test. I just plug the matrices into my graphing calculator and solve.</p>
<p>I never encountered one or a situation where I would ever think of using one in any problem on the real test or any practice tests.</p>
<p>in the blue book, it says that the matrix wont show up</p>