Question

hey the question is, " The length of a rectangle is twice its width. The perimeter of the rectangle is 126 feet."​

Answer 1

42 = l

21 = w

Explanation:

{l = 2w

{126 = 2w + 2l

126 = 2w + 2[2w]

126 = 2w + 4w

126 = 6w

21 = w [Plug this back into both equations to get the length of 42]; 42 = l

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