Your question prompted me to try this and I think what I did may have worked, at least it appears I have JPG image files burned on the same CD media that I have audio on that is playable in my home Sony CD player. Haven't yet tried it in the deck in the car.
I first burned the JPG images to the CD as data, but did not finalize it, which would have prevented writing more data to the CD. I then added a compilation of various mp3's as audio to the same CD to create a normal audio CD. I can view and open the JPG's in
Windows, but the audio is not visible.
I use a freebie burning utility
https://cdburnerxp.se/ that works pretty well for most tasks I do and it can also print audio playlists and cover images.