Depending on how your cat is on his/her own, and how relaint he/she is on wet food I'm sure you'll be fine.
We leave ours with a dry food dispenser, water fountain and extra water bowls so they have fresh water and they're absolutely fine. They miss their wet food, but they get over it. If it's nice weather they'll have fans left on too, although the house stays nice and cool.
The question is if the cat has access to the outside for toilets or if you're confident it'll use the litter tray every time.
I'd make sure you hide the remote though, ours stayed up late watching pay per view last time we went away and we got charged £150 for multiple viewings of "Rattatouili", the "three mouseketeers" and "Stuart Little"!