SOLUTION: A rectangle has a length of 6 cm is greater than its width. Find its width given that it's area is 91 cm^2

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Question 931200: A rectangle has a length of 6 cm is greater than its width. Find its width given that it's area is 91 cm^2
Found 2 solutions by ptfile, MathTherapy:
Answer by ptfile(81) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = The width
x+6 = The length
Formula for area of a rectangle
Area = Length x Width
It's area is 91 cm^2.
(x+6)(x)=91
x^2+6x=91
x^2+6x-91=0
(x+13)(x-7)=0
x=-13 or
x= 7
Substitute x for -13
(-13+6)(-13)=91
(-7)(-13)=91
91=91
Substitute x for 7
(7+6)(7) =91
(13)(7) =91
91 =91
The width can either be -13cm or 7cm. Since the are no negative integers on finding the length, the width should be 7cm.

Answer by MathTherapy(10556) About Me  (Show Source):
You can put this solution on YOUR website!

A rectangle has a length of 6 cm is greater than its width. Find its width given that it's area is 91 cm^2
Width: highlight_green%287%29 cm

You can do the check!! 

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