Answer:
This is a acute angle in the digits 1,4,6 should help the answer is acute 
 
        
             
        
        
        
1/2 = 4/8
3/8 = 3/8
8 is the common denominator between these two fractions
 
        
             
        
        
        
Answer:
Irreducible factorization
Step-by-step explanation:
 
        
             
        
        
        
Answer:
165 ways
Step-by-step explanation:
Selection deals with combination
There are a total of 11 from which 3 are to be selected
         11C3 = 11!/3!(11-3)!
                  = 11!/(3!x8!)
                  =(11x10x9x8!)/(3x2x8!)
                  =11x10x9/6
                  =11x5x3 = 165 ways