Answer:
4 and -18
Step-by-step explanation:
 
        
             
        
        
        
Answer:
(-2,4] and [7,α)
Step-by-step explanation:
the domain is open at -2 but closed at 4 and also closed at 7 but open till infinity..
 
        
             
        
        
        
1. k = 2<span>2.5</span><span>
2. xy=k
  
thats what i got</span>
        
                    
             
        
        
        
-300>100 that is the answer because its below sea level