Mathematics, 07.09.2021 04:20, Riplilpeep

The width of a rectangle measures (3s+t)(3s+t) centimeters, and its length measures (3s-9t)(3s−9t) centimeters. Which expression represents the perimeter, in centimeters, of the rectangle?

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The width of a rectangle measures (3s+t)(3s+t) centimeters, and its length measures (3s-9t)(3s−9t) c...