Please help with Resultant of Force Question

I am in a Applied Mechanics for Engineering Course and need some help with vectors. I am struggling with this question and would like some help. How do I solve this? I am also very confused with how the Force of 68N shows an angle of (x=15, y=8) and not the angle. Can someone please explain this to me? I have drawn a picture in paint:

Question:

Determine the resultant of the force system shown

http://i37.tinypic.com/2mrf6g6.png

Any help would be greatly appreciated(Happy)