68 miles / hour
Average speed = distance / time
distance = 170 and time = 5/2 ( as an improper fraction)
speed = 170 ÷  = 170 ×
 = 170 ×  =
 =  = 68
 = 68
 
        
                    
             
        
        
        
<span>-8(n+3)+28=-5n-5
-8n-24+28=-5n-5
</span>-8n+4=-5n-5
-8n+4-4=-5n-5-4
-8n=-5n-9
-8n+5n=-5n+5n-9
-3n=-9
-3n/-3=-9/-3
n=3
n=3 is the correct answer
        
             
        
        
        
sorry answered the wrong one..
 
        
             
        
        
        
Is it 100 because it just is done ya and 1000 
        
             
        
        
        
Answer:

Step-by-step explanation:
