I would say 1 but I feel like that wouldn't help you and that's all I know, plus I don't want to look it up because of the policy. I wanna help tho, so that's all I'm gonna say (please don't get mad at me)
        
                    
             
        
        
        
 y = (t x - m -s)/r
Step-by-step explanation:
Step 1 : 
Given, 
r y + s = t x - m
=> r y = t x - m -s
=>  y = (t x - m -s)/r
Step 2 :
A) r can take any values except 0. 
 This is because when r = 0, the denominator becomes 0 and division by 0 is undefined
The limitation for r is r should not be equal to 0
The other variables can take any value. Hence the other variables do not have any limitation 
 
        
             
        
        
        
200 x 4 =. 800 + remainder 3 = to 803 803 divided by 4 = 200.75
        
             
        
        
        
Both point (5,12) and (11,12) lie on the horizontal line  y=12.
If these two points is a leg of the triangle, the other leg must be perpendicular to the horizontal line, that is, the other leg must be vertical, but passing through either (5,12) or (11,12), i.e. lies on either the vertical line x=5 or x=11.
There is only one point that passes through x=11, i.e. point A(11,4).