Sometimes there is no apparent way to factor it by hand /(the factors are decimals or imaginary). To try and factor these problems is nearly impossible in your head.
        
             
        
        
        
Answer:
 and 
Step-by-step explanation:
(a)
Expressing as a fraction
 ( divide numerator/ denominator by 2 )
= 
 ← in simplest form
(b)
Expressing as a fraction
 ( divide numerator/ denominator by 10 )
= 
 ← in simplest form
 
        
             
        
        
        
We would need the data of their classmates scores to complete this answer
        
             
        
        
        
Answer:
D
Step-by-step explanation: