SOLUTION: The lenght of a rectangle is fixed at 28 cm. What widths will make the perimeter greater than 100 cm?
The width must be greater than ? cm
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Question 146588: The lenght of a rectangle is fixed at 28 cm. What widths will make the perimeter greater than 100 cm?
The width must be greater than ? cm
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the perimeter formula
Plug in
Multiply
Set the right side greater than 100
Subtract from both sides.
Combine like terms on the right side.
Divide both sides by to isolate .
Reduce.
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Answer:
So the answer is
So the width must be greater than 22 cm
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