is this a good battery for my rv?

Okay - I will start again there.

Some of the responses trying to help you talk about starting the motor, house vs chassis etc.
Since you are posting in the Class A section some people think you might have up to 6 batteries. 4 for the house and 2 for the chassis.

I promise it will not be any harder for you to post in the TT forum.

I said YUP - that is a photo of it.

thcguy12 wrote:
Yup!

That's all you can say for indicating that you had a class A MH, rather than a TT?
Oh well and you can still connect two 6v golf cart batteries in series if you have the space for them.

It would be much less confusing to us if you would post in the Travel Trailer section instead of the Class A forum,

Yup!

I think THCguy's Class A looks something like this:

thcguy12 wrote:
So we were bought this battery and I'm wondering if it's a good option?

CarQuest DCG27
Marine Battery
12V Deep Cycle Marine/RV Battery,
Gp 27 - 575 CCA/715 MCA,
175 Min

Except mine says 200 min at 23 amps

I assume you're talking a house battery and not for the chassis.
If so, it would be much better with two 6v golf cart batteries connected in series as already said, but in lieu of that for whatever reason, they do make pure deep cycle 12v batteries, as well. You won't get as much out of the one 12v as you would the two 6v, but if you're shy of space and can't do anything about it, then you have no choice.

The battery should last a couple days with reasonable conservation. Then the 120 watts of solar should have you back fully charged in a few days of good sun. If you leave stuff running like the fridge the solar may or may not be enough. Get a second like battery if the one seems a bit light on power. Get a second 120 watts if you do not have a full charge upon return.

Don't mix a deep cycle with a marine .. As stated get a identical match . 120 watt panel will keep then charged and provide some light use lights , water pump etc