Answer:
x = 16/y
or
y =16/x
Step-by-step explanation:
31=xy+15
subtract 15 from both sides of the equation:
xy = 16
x = 16/y
or
y =16/x
 
        
             
        
        
        
Answer:
30 units
Step-by-step explanation:
I'm sorry if this is wrong
 
        
                    
             
        
        
        
the lateral area and total area of regular pyramid with a square base is 130