I made 2 marble cakes, one I put in the freezer the other one I frosted and we had it last night. I found that it was very dry. How can I save the cake in the freezer, I don't want to rebake it. I think I had heard something about putting a sugar syrup on it????

Yes, you might be able to save it. First let it thaw. Try it then, sometimes a vacation in the deep freeze will add moisture to it anyway. If not, give the top a wash with a simple syrup (2 parts sugar to 1 part water, brought to a boil and then cooled) and pop it back in the fridge.