Depends on the breed and the age. If it's a puppy that isn't housebroken, I'd say no. Maybe rescue a dog that is 3-4 years old? Also, some breeds are better when left alone than others -- look at energy levels. Labs, Goldens, Weimeraners, etc all tend to be high energy and need more time to let that energy out. Shepherds tend to have more anxiety issues.
Also, don't depend on the roommate to help you out. Say he moves out in a few months and you've been dependent on him to help you care for the dog. Assume his helping is just that, extra help. Not the factor that makes getting a dog a possibility.
I work 7-4 and let my guy out for lunch and there are no problems. I wasn't able to crate him (he's a rescue with an obvious bad crating experience) so I confined him to my kitchen with baby gates while housebraking him. Hope this helps.
re: Getting a dog when you will not be home much?(Posted by AlexLSU on 1/25/13 at 12:11 pm to tigers102886)
Exactly. I love my dog more than most people I know, but he's still a dog. He goes out in the morning, I take him for a 10 min walk at lunch, and he gets to run in the afternoons. It would be ideal to have a nice yard for him to hang out in, but dogs get accustomed to their surroundings eventually.
BTW, I have an 85lb, 3 year old catahoula that I got at 6 weeks old. He, like all dogs, will frick some stuff up early on, but they all get used to the routine at some point.