Hello  Hdolly81 
<u><em>The LCM of 156 and 321 is 16692</em></u>
Backup:
156: 2,2,3,13,
321: 3,107
2 * 2 *  3 * 13 * 107 = 16692
:)
 
        
             
        
        
        
Answer:
W - (-4,4)
X - (-1,4)
Y - (-1,2)
Z - (-4,2)
Step-by-step explanation:
hope it helps. :)
 
        
             
        
        
        
Let say the number is 0.5 
Then, sum of this number will be 0.5+0.5=1 
Now two is twice of 1.
Hence, it proved to be correct. 
And difference between 5 and 1 is 4 which is less than 12. It also match the question condition. 
Answer: The number is 1.
        
             
        
        
        
Reflecting is pushing it across from one side to another.
The answer would be (7,6)
Sorry I'm late.