Help with an equilibrium problem

[Jetwash]

Hi guys wondering if anyone can help me with this question that I am stuck on just not sure were to start.

 

[Jetwash]

And this one also sorry

Issues with this also

 

[SteamKing]

Q5: The block must be in equilibrium. Therefore, what condition must apply to the tensions in the attached cords?

Q10: Do you know how to find the resultant of several vectors applied at the same point?

 

[Jetwash]

With both questions I have tried summing x & Y forces into simultaneous equations but for some reason these to do not add up

 

[SteamKing]

We can't provide any help without seeing your work.