Short answer: probably. The lager yeast should ferment in the 50s. At that high of a temp, the ale yeast would be fine. The lager yeast will produce some less-than-desirable flavors that will probably ruin anything that the ale yeast did to produce good beer. As an experiment, you could try it and see what happened. However, I wouldn't do it and expect great beer to come out.
EDIT: I should have noted that some yeast strains are blends of lager and ale yeast, so if you're using one of those in the type of beer for which it is intended, then you'll probably turn out a great beer provided, of course, that the rest of your process is solid, too. If you're just mixing two random types of yeast, then you're outcome might not be so great.
At any rate, have fun with it.