Answer:
1. 
2. 
3. 
Step-by-step explanation:
The equation of the line that passes trough the points A(14,-1) and B(2,1) is

The y-intercept of this line is

Line BC is perpendicular to line AB, then its slope is  Line BC passes through the point B, so
 Line BC passes through the point B, so

If the y-coordinate of point C is 13, then x-coordinate is 

 
        
             
        
        
        
Answer:
1st answer
Step-by-step explanation:

 
        
             
        
        
        
Answer:
37.79924
Step-by-step explanation:
 
        
                    
             
        
        
        
The answer would be the first option :)