Answer:
10
Step-by-step explanation:
The ratio of abc/def=1.5
15/1.5=10
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It is very unlikely that the children will be able to digest lactose. 
        
                    
             
        
        
        
Answer:
42 and 44
Step-by-step explanation:
The even numbers are numbers which can be written as 2n where n is any integer number.
Therefore, two consecutive numbers would be "2n" and "2n + 2"
We then have that 
2n + (2n+2) = 86
4n + 2 = 86 
4n = 84
n = 21
And the even number 2n is 2(21) = 42.
(We can verify this answer by doing 42 + 44 = 86) 
 
        
             
        
        
        
Answer:
21
Step-by-step explanation: