My Math Forum The length of a rectangle is 6 units more than 9 times the width. Write an expressio

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 March 13th, 2016, 07:15 PM #1 Senior Member   Joined: Feb 2016 From: seattle Posts: 377 Thanks: 10 The length of a rectangle is 6 units more than 9 times the width. Write an expressio Am I even close? 2x+2 (9x+6)
 March 13th, 2016, 07:31 PM #2 Math Team   Joined: Jul 2011 From: Texas Posts: 2,816 Thanks: 1460 $L=9W+6$ I'm guessing you need an expression for the perimeter, but you didn't state that in your post ... $P=2W+2(9W+6)$
March 15th, 2016, 10:04 AM   #3
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Quote:
 Originally Posted by GIjoefan1976 Am I even close? 2x+2 (9x+6)
Close to what? Your sentence seems to have been cut off! I would note a couple of things: you haven't said what "x" represents, you haven't said what that is supposed to be equal to, and it could be more simply written as 20x+ 12.

If, as skeeter suggests, the problem is to write an expression for the perimeter as a function of the width then you need to say "Letting the width be represented by x, the perimeter is given by 20x+ 12."

Last edited by skipjack; March 15th, 2016 at 10:33 AM.

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