Answer: The perimeter of Kayla's garden including the walkway is 24+4w.
Step-by-step explanation:
Since we have given that
Length of garden = 4 ft
Width of garden = 8 ft
Since there is walkway of width w.
So, length of garden including walkway = 4+w
Width of garden including walkway = 8 + w
So, perimeter of Kayla's garden would be
[tex]2\times (l+b)\\\\=2\times (4+w+8+w)\\\\=2\times (12+2w)\\\\=24+4w[/tex]
Hence, the perimeter of Kayla's garden including the walkway is 24+4w.