Distance = speed rate x time
Speed rate = 120 miles per hour
Time = 3 hours 
Replacing:
D = 120 mph x 3 h = 360 miles
 
        
             
        
        
        
Answer:
Midpoint = (  (x1+x2)/2 , (y1+y2)/2 )
Step-by-step explanation:
Please upload the line segment otherwise, you can use the equation above to solve for it.
 
        
                    
             
        
        
        
Answer: n= -20?
Step-by-step: 
Simplify both sides of the equation 
1/5n+4=0
Then subtract 4 from both sides 
1/5n + 4 - 4 = 0 - 4
1/5n= -4
Then multiply both sides by 5
5*(1/5n)=5*(-4)