Answer:
You are given the width of the garden which is w= 8 feet
length of the garden which l= 6 feet
the width of the walkway is x
so for every side of the garden there is an x
so length overall would be 8+2x (length of garden + x one side + x other side)
and width overall would be 6 + 2x (width of garden + x of one side + x of other side)
area of rectangle is length*width 
so the expression would be (8+2x)*(6+2x)
:))) smile....
I hope it is correct.
Step-by-step explanation:
 
        
             
        
        
        
f(x)= -1/2x-7 (better expressed as   f(x) = (-1/2)x - 7  )   has a negative slope, so as x increases, y decreases.  Answer D is correct.
 
        
                    
             
        
        
        
Answer:No
Step-by-step explanation:
 
        
             
        
        
        
Answer:
no
Step-by-step explanation: