First convert both distances to the same unit.
1 mile is 5280 feet or 1760 yards.
Subtract 1760-880 and get 880 yards.
Noah swam 880 yards further than Liam ran.
        
             
        
        
        
Step-by-step explanation:
= (4)(102)
= 408 (408) (0.04) = 16.32 16.32/7.2
= 2.26666667 
 
        
                    
             
        
        
        
-2a-9=6a+15
Move 6a to the other side. Sign changs from +6a to -6a.
-2a-6a-9=6a-6a+15
-2a-6a-9=15
-8a-9=15
Move -9 to the other side. Sign changes from -9 to +9.
-8a-9+9=15+9
-8a=15+9
-8a=24
Divide both sides by -8
-8a/-8=24/-8
a=-3
Answer: a=-3