This is a way to work it out
 
        
             
        
        
        
Answer:
47 I believe
Step-by-step explanation:
 
        
                    
             
        
        
        
H= -8. H-2h= 9-1; -h=8; h= -8
        
                    
             
        
        
        
Answer:
27
Step-by-step explanation:
Factory A proportion:
3 : 2,000
Factory B proportion:
5 : 4,500 (this can be simplified):
1 : 900
Now plug in 18,000 to each proportion:
Factory A: 
x : 18,000
3 : 2,000
x = 27
Factory B:
x : 18,000
1 : 900
x = 20
Factory A had the greater amount of defects, 27