Answer:
Step-by-step explanation:
Given the equation y=-2x+1 and given another equation y=mx+b in order for us to have no solution we must guarantee that both lines do not intersect. Recall that m is the slope of the second equation and b the y-intercept. To guarantee that both lines don't intersect, they must be parallel. To have this result, we must have that they have the same slope but different y intercept. That is take m = -2 and b any value different to +1. For example, the b = 6. So 
y = -2x+6 = -2(x-3) is another equation that gives no solution to the system.
 
        
             
        
        
        
No it doesn’t make any of them true
        
                    
             
        
        
        
Tina can finish in 5 hours 
Bill takes two hours longer than Tina. 
5+2=7 
Bill takes 7 hours to cut the lawn. 
7+5=12
It takes both of them working together 12 hours. Hope this helped!
        
             
        
        
        
Step-by-step explanation:
1 l = 22.5 km
125 l = 22.5 × 125 = 2812.5 km