I'm been trying this kind of thing, since org-export-html-mathjax-options doesnt have anything to configure.
I don't think this looks very right though.
#+LATEX_HEADER: \usepackage{amsmath}
#+MATHJAX: align:"left" mathml:t path:"C:\Users\JohnT\Desktop\mj\MathJax.js"
#+BEGIN_HTML
<script type="text/_javascript_"
src="">
</script>
<script type="text/_javascript_"
MathJax.Ajax.loadComplete("C:\Users\JohnT\Desktop\mj\config\TeX-AMS-MML_SVG-full.js");
</script>
#+END_HTML
#+TEX
$$\begin{matrix}
a & b & c \\
d & e & f \\
g & h & i
\end{matrix}$$
#+END_TEX