Brutal: savagely violent.
        
                    
             
        
        
        
Answer:
well u need to know English inorder to understand the theories and concepts of math.
Explanation:
start like this,
All though nowadays people prioritize mathematics over everything , it is essential for a person to know their English . Because eveyone has to know English inorder to understand the theories and concepts of math. Also since English is the Internationally recognized language it is very important for mathematicians to know English if they wanna exchange ideas with the world
 
        
                    
             
        
        
        
Answer:
l think for the first the answer is C and the second the answer is D
 
        
                    
             
        
        
        
Answer:
make of no use or value; cancel out= nullify
(of fabric) filled with air and swelling outwards = billowing
 
        
                    
             
        
        
        
Nationality would be the country a person was born in. Ethnicity would be their ethnic or racial background.
Example:
A person could be born in Canada and be Canadian but their ethnicity could be something like Chinese or African.