Answer: -1/9
Step by step explanation:
The common difference of an arithmetic sequence can be found by picking 2 consecutive terms, and subtracting the second from the first. For example, if I chose the terms 2 and 1 8/9, I would find the common difference by:
1 8/9 - 2, which is equal to -1/9.
You can confirm this by picking another pair of consecutive terms. Let's pick 1 7/9 and 1 2/3:
1 2/3 - 1 7/9 = -1/9, as 1 2/3 = 1 6/9, so 1 6/9 - 1 7/9 = -1/9
 
        
             
        
        
        
Answer:
I think 9 but dont quote me on it
 
        
                    
             
        
        
        
Answer:
27/16
Step-by-step explanation:
this is because i added up 1/2 and 3/4 first, which gave me 1 1/4, and i converted this into just a single fraction without a whole number to make the adding easier for me which was 5/4.  
(a whole number is the amount of times the bottom number of the fraction went into the top number so-... 4 goes into 5 one time which gives you a whole number of 1 and the fraction of 1/4. the 1 being left from the five.) 
then i added 5/4 and 7/16 to get 1 11/16.  which then converted into 27/16
 
        
             
        
        
        
Answer: the brother is 20 and the sister is 9
Step-by-step explanation:
29 - 11 = 18  18 divided by 2 is 9
9+11 is 20 the brothers age so the sister is 9
 
        
                    
             
        
        
        
$745.42 because $375.98 - $38.56 = $337.42. Since Mr. Kent deposited $408.00 into his balance at the bank, $408.00 + $337.42 = $745.42.