exam Maths Puzzle Numerical Ability

A sample of 20 pages was taken without replacement from the 1,591-page phone directory Ameritech Pages Plus Yellow Pages. On each page, the mean area devoted to display ads was mea

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can you please show me the steps on solving this problem and its answer thank you tutor =)

8x^2-47x-6= The length of a rectangle is 2 in. more than twice its width. If the perimeter of the rectangle is 34 in., find the dimensions of the rectangle. (I need to show the equation, thanks very much.)