JR-Texas answer is incorrect. I load apps from Google Play(store) all the time on my Samsung Galaxy Tab 2 tablet. There is even a "tablet" tab" in the Google Play(store),actually it is the 4th tab over.
As for running Google store apps on the Coby MID 9042, no not as manufactured by Coby. The reason is Coby is not using a currently recognized version of Android that Google will allow you to install any app. Can the Coby be made to be able to use Google Play(store) and a host of other features and apps, yes. It would require you "root" the tablet. Problem is that rooting the tablet will void the warranty.
GetJar is a mess that even Coby acknowledged it and had the 9042 users start using SlideMe as the Coby compatible app store.
As a side note,my opinion, the Coby 9042 is just about useless. I am saying this as a person who bought one for the grandson for Christmas and totally regret it.