Answer:

Step-by-step explanation:




 
        
             
        
        
        
The angles diagonally opposite each other are congruent while those adjacent to each other add up to 180 degrees. You can get eight congruent angles with a transversal if the two lines are parallel, because each angle would be 90.
        
             
        
        
        
First subtract 8.5 from both sides, then divide the -1.2 to get x by itself 
x=1.5
        
             
        
        
        
At the end of Round 3, David's score would be 2000.