SOLUTION: the perimeter of a rectangle is 28cm.express the area of the rectangle in terms of the width x

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Question 320945: the perimeter of a rectangle is 28cm.express the area of the rectangle in terms of the width x
Answer by Sunny Day(15) About Me  (Show Source):
You can put this solution on YOUR website!
Perimeter of a rectangle = 2(length + width) = 28 cm.
(length + width) = 28/2 = 14cm
Now since it is given that the width is x,
length + x = 14
or, length = 14 - x
Area = length X width
= (14 - x) X x
= x(14-x)
= 14x - x^2