Final answer:
Option B) is the correct answer. The perimeter of a regular hexagon with a side length of 9m is 54 meters.
Step-by-step explanation:
The length of one side of a regular hexagon must be known in order to calculate the hexagon's perimeter. The formula P = 6s, where P is the perimeter and s is the length of one side, yields the perimeter of a regular hexagon. The perimeter can be found by substituting x = 9m into the following formula: P = 6(9) = 54m. Consequently, 54 meters is the perimeter when x = 9 meters. Hence, Option B) is the correct answer to the given question.