Hi OutToLunch,
Fixing kids' school work is a nightmare, isn't it?
I am sorry, I didn't notice the mistakes with the negative feedback on the first couple of schematics.
Hi El Nino,
If the polarized 10uF capacitor has its polarity backwards then it might be destroyed or it might couple a DC voltage to the input of the TDA2822M.
A 10uF capacitor will have a cutoff frequency of only 1.6Hz and take 6 seconds to charge. Use a 330nF film capacitor instead for a cutoff frequency of 49Hz.