Answer:
no solution 
Step-by-step explanation:
 
        
                    
             
        
        
        
Round trip is going there and back so it is 2*(6 7/10)=12 14/10=13 4/10=14 2/5
        
                    
             
        
        
        
Answer:
(B) -25/4 
Step-by-step explanation:
-5/3 ÷ 4/15
Copy dot flip
-5/3 * 15/4
Rewriting for easier math
-5/4 * 15/3
-5/4 * 5
-25/4
 
        
             
        
        
        
To find the diameter of a circle, using only the circumference, you need to divide the circumference by π, or 3.14.
So in this case, you must divide 12 by 3.14, which gives you 3.82. 
I even double checked this, and should be correct then.
 
        
                    
             
        
        
        
1 meter = 39.370 inches.....so 5 meters = (5)(39.370) = 196.85 inches