Question 218299
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The perimeter of a rectangle is given by:

*[tex \LARGE \ \ \ \ \ \ \ \ \ \ P\ =\ 2l\ +\ 2w].

Making the appropriate substitutions:

*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 2(7x + 2)\ +\ 2(5x)\ =\ 100]

Solve for *[tex \Large x] and then substitute that value back into *[tex \Large 7x + 2] to find the length and *[tex \Large 5x] to find the width.

John
*[tex \LARGE e^{i\pi} + 1 = 0]
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