Can you please answer this it’s 7th grade math ixl

Answer:
W = 8 m
Step-by-step explanation:
The formula for "perimeter" is P = 2L + 2W, where L and W represent the length and the width respectively.
Here, P = 54 m = 2(19 m) + 2W, so:
54 m = 38 m + 2W, or
16 m = 2W, and so W must be W = 8 m