How do you tell which set of elements forms a precipitate?

So, if I have:
Ba2+(aq) + 2Cl-(aq) + Ag+(aq) + NO3 2-(aq)

Which forma the precipitate? Is it AgCl2 because it has fewer ions to bond? Or is it BaNO3? And why?

In the figure (not to scale) AB = CD, angle DAP = angle DPA and A,B,C,D are concycli. If angle ADC = 80°, then find angle ACD.

Solve : 2^(x+2)+2^(x-1)=9

Volume of a Cylinder

What length of tarpaulin 3m wide will be required to make conical tent of height 8m and base radius 6m ? Assume that the extra length of material that will be required for stitching and wastage in cutting is approximately 20cm ( Use pi= 3.14)

Find the square of: 2a +b