Yes..it does. To be a function, all the inputs (x's) have to be different numbers...there can be no repeating x's...there can be repeating outputs (y's)...just not the x's
        
             
        
        
        
Answer:
x+3 = x+3
Step-by-step explanation:
No matter what you plug into x, both sides will be the same.
 
        
             
        
        
        
A. You can factor it to those terms
        
             
        
        
        
Perimeter = 24m
Cost of half metre(1/2m) = €1.20
Cost of one metre = €2.40
Cost of fencing = 24 × 2.40 = €57.60
HOPE THIS WILL HELP YOU