How do you do this chemistry problem?

Question

A 525 g piece of copper tubing is heated to 92.8°C and placed in an insulated vessel containing 47.5 g of water at 39.0°C. Assuming no loss of water and heat capacity for the vessel of 10.0 J/K, what is the final temperature of the system (c of copper = 0.387 J/g·K)?

I tried using q=mc delta T. But my answer was wrong. The information about the heat capacity of the vessel being 10.0J/K must be important, but I'm not sure how to use it in the equation

Answer 1

The following solution ignores the heat capcity of the vessel.

http://dbhs.wvusd.k12.ca.us/webdocs/Thermochem/MixingMetal&Water.html

Answer 2

Use H = mc delta T