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suppose that the width of a rectangle is three feet shorter than length and that the perimeter of the rectangle is 84 feet. set theequation for perimeter involving only L, the length of rectangle.

- deborah singletary
**Posts:**1**Joined:**Sun Nov 22, 2009 4:30 am

They give you width in terms of length, so pick a variable for the length. Come up with an expression for the width in terms of this variable, so the expression means "the length, less three". Insert the variable and the expression into the formula for the perimeter, and subsitute the perimeter value they gave you for the P in the perimeter formula. This will give you the equation you need.

- nona.m.nona
**Posts:**249**Joined:**Sun Dec 14, 2008 11:07 pm

2 posts
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