Try this:
1. sum of numbers is x+y=67, the difference between them is x-y=11
2. it is possible to make up and resolve the system:
 
 
        
        
        
$92 - $20 = $72, because we shouldn't take allowance into account
3 + 6 = 9, because that is the total number of hours this person works per week
We should just do this:
72 / 9 = 8
This means that this person earns $8 per hour at his part time job. 
        
             
        
        
        
Answer:
7
Step-by-step explanation:
70, 72, 72, 72, 74, 76
There are 6 numbers that have 7 as a 10. There are only 5 ones on the leaf of the stem 7. The 6 is missing.
 
        
             
        
        
        
That would be on the 5th week. There were 18 students that attended (D.)
Hope this helped!
 
        
             
        
        
        
Answer:
10a+31 is the simplified version but if you are trying to ask 10a-25=56 your answer would be 8.1
Step-by-step explanation: