4x-5y=-15
That’s the answer your welcome
        
             
        
        
        
Slope= y^2-y^1
 ————
 x^2-x^1
slope= 12-0
 ——-
 6+2
slope= 12
 —-
 8
slope= 3/2
perpendicular slope is the opposite reciprocal 
perpendicular slope= -2/3
        
             
        
        
        
Answer:
20% of $886.20 is 177.24 so the better deal would be 20% off
Step-by-step explanation:
 
        
             
        
        
        
Step-by-step explanation:
theta = 180 - 123 = 57 degree 
arc length = 2 * pi * R * ( theta / 360)
 = 2 * pi * R * ( 57 / 360)
 = 0.994R cm