Inline equation in latex with text
Enclose your formula in single $
, as follows:
Text text text $ \some \math \commands $
more text text text.
Note that if you use double $$
instead, the formula will appear in it's own line, and the text will continue below.
It depends also on how you want your "variables" to appear; if you want them in the normal text font, then
$\textrm{Amplitude} = 0.3 \cdot \textrm{Max\_Amp\_Of\_Signal}$
is sufficient. Notice the \_
to get the underscore, because _
has a special meaning in LaTeX.