... perimeter of the park. Find the perimeter when x=10yd. THanks!

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i dont even want to watch the video. im assuming this park is rectangular.thus perimeter is the sum of all sides.since, it is rectangular, perimeter = x + y + x + y but here, x = 10yd thus perimeter = 2x + 2y=2 times 10yd + 2y=20yd + 2y=2y(10d + 1 )