You could put,
 19
+ 6
———
 25
Then write, 
19+6=25
        
             
        
        
        
Answer:
B
Step-by-step explanation:
We can start by converting 1 into 6/6 and 1/3 into 2/6. This makes subtraction much easier, and by subtracting the numerators, (6/6 - 2/6) you should get 4/6.
 
        
             
        
        
        
We divide the total sum of the angles by 20

=18 sides
 
        
        
        
Answer:
A.  x = 3/k.
Step-by-step explanation:
 5kx + 6 = 7kx
5kx - 5kx + 6 = 7kx - 5kx
6 = 2kx
x = 6 / 2k
x = 3/k.
 
        
             
        
        
        
Answer:
15000
Step-by-step explanation:
0.4%=0.004
0.004x=60
x=60/0.004
x=15000