Answer:
6
Step-by-step explanation:
 
        
             
        
        
        
Answer:
13
Step-by-step explanation:
there is a rule that says that if you add any 2 sides, it should be more than the third. 9+21 is greater than 13. 21+13 is greater than 9. 13 is the only number which if you add 9 to it it will be greater than 21. 12 will equal 21, but it still wont work. 
hope this helps :))
 
        
             
        
        
        
Answer:
10/22
10 blue marbles/22 total marbles
(simplified = 5/11)
 
        
             
        
        
        
Answer:
your answer for K should be 12
 
        
                    
             
        
        
        
Answer:
cost per pound = $4.20
Step-by-step explanation:
Cheese cost per pound = ?
 first for the cost per pound
cost per pound = total cost / pounds bought
cost per pound = $10.50 / 2.5 pounds
cost per pound = $4.20
to check the above answer is correct
cost per pound = total cost / pounds bought
cost per pound = $12.60 / 3 pounds
cost per pound = $4.20
Therefor, the cheese costs $4.20 per pound.