Write the problem as an equation:
5n <65
Solve for n by dividing both sides by 5:
n <13
Because the inequality does not contain an equal sign, n (13) is not included in the answer so there would be an open circle on the number 13 
The correct answer would be A.
 
        
             
        
        
        
Answer: 3/2a3
I can't properly write the answer sorry but it's the last one.
 
        
                    
             
        
        
        
6/10 and 5/10
The common denominator is 10
 
        
                    
             
        
        
        
The vertex would be the point on the right angle like the tip of the right angle 
 
        
             
        
        
        
Supplementary angles add to 180
4+5=9
180/9=20
4*20=80
5*20=100
the angles are 80 degrees and 100 degrees