-How you find the answer is by finding how many times you can arrange the numbers. You cannot have the same arrangement/number in an arrangement twice.
(These are all the arrangements.) -20, 41, 6, -20, 6, 41, -41, 6, 20, -41, 20, 6, -6, 41, 20, -6, 20, 41,
There are 108 inches in 9 feet but there are 5 so 108×5= 540 so to get your answer you need to divide that by 15 which equals 36. so you can make 36 pieces
