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All you have to do is add all the angles and equate to the total sum of angles for a quadrilateral.
360 = Angle Q + Angle P + Angle R + Angle S
Other relationships/equations are:
Q = 2P
R = 3b-19
S = 3b+10
Then, substituting...
360 = 2P + P + 3b - 19 + 3b + 10
360 = 3P +6b - 9
360 - 3P + 9 = 6b
6b = 369 - 3P
b = (369 - 3P)/6
b = 61.5 - 0.5P
Once you know the value of P, then you can determine the exact value of b.
        
             
        
        
        
Answer:
Its C
Explanation:
Both actions were attempts to suppress Chinese cultural dominance.
 
        
                    
             
        
        
        
Answer:
Because it is important to know who will excersise the power, all governments need a continuity plan as well as enterprises to endure over time. 
Explanation:
 
        
             
        
        
        
Answer:
False
Explanation:
the victory of the battle of Saratoga convinced king Louis to join the war