1. is 5 dollars an hour
2.it represents the amount of money he gets in an hour
Sorry i could not help with 3 and 4 
WE HAVE STEM BRAINS
        
             
        
        
        
Answer:
9
Step-by-step explanation:
4x9=36
5x9=45
6x9=54
7x9=63 
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750+20(30)=1350
Or do you need to explain it?
        
             
        
        
        
Answer: the second column is 12,  then 15, then 6
Step-by-step explanation:
that is some good chocolate milk
 
        
             
        
        
        
Answer:
its the second 1 
Step-by-step explanation:
i had last week and got a 88.87%