Multiply 2x-2y=10 by 2,
4x-4y=20,
given:4x-5y=17
y=3
pluck it in
2x-6=10 
move the 6 to the right
2x=16
divide
x=8
y=3
        
                    
             
        
        
        
Answer:
y=2x +1/2
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
The right angle's vertex.
Step-by-step explanation:
A right angle is 90 degrees. The vertex is at the middle of the angle, so that point is used to draw a segment in the middle of the right angle.