The answer would be 4
(Positive 4 btw)
        
             
        
        
        
 Answer:
Step-by-step explanation:
Fist you add -13 to 6y and than 4x that should be 69420
 
        
             
        
        
        
Answer:
%28.57 (14285714286)
Step-by-step explanation:
Divid To get decimal (percent right)
250/350= 0.714285714285714
Subtract from 1 to get decimal (Percent wrong)
1.0 - 0.714285714285714= 0.285714285714286
Move over decimal to placements to the right to convert to percent
%28.5714285714286
Round 
%28.57
 
        
             
        
        
        
I used desmos online.
(1,-2)