Traffic signs are regulated by the Manual on Uniform Traffic Control Devices. The perimeter of a rectangular traffic sign is 80 inches. Also, its length is 14 inches longer than its width. Find the dimensions of this sign.
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The perimeter equation is
Well our perimeter is 80.
We know that our Length=14 inches longer than our width
Substitute L=14+w into our equation
Thus our width is 13inches.
Substitute W=13 into L=14+W
Thus our Length is 27 inches.
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