Answer:
Function: 
Not Function:  and
    and     
Step-by-step explanation:
Given



Required
Determine if  is a function of
 is a function of 
Solving x+y=9

Make y the subject of formula

<em>Hence; y is a function of x</em>
Solving 

Subtract x² from both sides

Square root of both sides

This implies that
 or
     or     
<em>Because </em> <em> can be any of those two expressions, it is not a function.</em>
<em> can be any of those two expressions, it is not a function.</em>
Solving 

Reorder

Take square roots

This implies that 
 or
      or        
<em>Because </em> <em> can be any of those two expressions, it is not a function.</em>
<em> can be any of those two expressions, it is not a function.</em>
 
        
             
        
        
        
It would cost $26 because 3x8=24. 3/1/3=1. so 1/3=$1.
        
             
        
        
        
Answer:
(-1 , -1)
Step-by-step explanation:



 
        
             
        
        
        
4d + 9 - d - 8 = (4d - d) + (9 - 8) = d(4 - 1) + 1 = 3d + 1
        
                    
             
        
        
        
I think that it will be unlikely because it is a 1/12 chance they will land on the star.