Question 1182103
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A swimming pool manufacturer installs rectangular pools whose length is twice the width, plus 5 m.
The entire outer edge of the pool must be filled with coping, which is a cap used to join the wall 
of the pool and the deck. Find a simplified algebraic expression that describes the total length of coping needed.
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<pre>
If w is the width, then the length is (2w+5).


They want an expression for the perimeter, which is


    P = 2w + 2*(2w+5) = 6w + 10.    <U>ANSWER</U>
</pre>

Solved.