84 I'm sure it's that I did it before
 
        
                    
             
        
        
        
Let's first find out their factors.
90's factors are : 

190's factors are :

The common factors of 90 and 190 are :
1,2,5 and 10. 
The greatest one among these is, 10. So the greatest factor of 90 and 190 is 10.
 
        
        
        
Answer:

Step-by-step explanation:
 
        
             
        
        
        
It should be zero solutions since the lines never intersect.
I mean it could also be viewed as if they intersect at every point so I'm sorry if its wrong (the M is slightly above the N so it should be parallel)
Its perpendicular if it only intersected at one point- 1 solution
If it intersects at every point- infinitely many solutions
        
                    
             
        
        
        
Answer:
1.
Step-by-step explanation: