# How Do You Solve A Linear System with WolframAlpha?

Many of you may already be familiar with using a graphing calculator to put a matrix in reduced row echelon form. Did you know that you can do the same thing with WolframAlpha?

To see how this is done, let’s start from the system of linear equations Goto MathFAQ >

# How Does Elimination Compare to Matrix Elimination?

You probably noticed that the process we used to solve linear systems in Section 2.2 is almost identical to the process we used to solve linear systems in Section 2.4.

To make this concrete, let’s compare the steps for the system Goto MathFAQ >

# How Do You Model a Stock Portfolio Containing Two Stocks?

Suppose we want to construct a stock portfolio containing two stocks. If we have \$50,000 to invest and desire a total dividend return of 3%, how much must we invest in each stock?

Although this is a pretty simple portfolio, it gives us insight into how we can model the portfolio with a system of linear equations.

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# What Should Have Happened on Gilligan’s Island? Put a bunch of people of both genders on a deserted island…what should happen?

Goto the MathFAQ >