Answer: The median number of posts made is 8.5
 
        
             
        
        
        
What is the question though?? and what are the answer choices?? 
        
             
        
        
        
Answer:
Ok
Step-by-step explanation:
do u mean into bracket 61/4 raised to the power of 4???
 
        
             
        
        
        
15 is coefficient, a is a variable, 2 and -7 are like terms, 15a is a term and 2 and 7 are constants.