Answer:
b and a
Step-by-step explanation:
 
        
             
        
        
        
The values are equal.
Root 5.76= 2.4
-2.4=-2.4
        
             
        
        
        
Total work amount
6 men * 14 days
84 men days
If it is done within 21 days, need x men
84 men days = x men * 21 days
x = 84/21 men
x = 4 men
        
             
        
        
        
Answer:
2.5 miles per hour
Step-by-step explanation:
ok, so we already know how long she walked in 1/2 hour and we need to find out how many miles in one full hour. So, i multiplied 1 1/4 times two to make up the one full hour and I got 2.5 miles. So the rate is 2.5 mph.
 
        
             
        
        
        
Answer:
-14/1-5x
Step-by-step explanation: