Perimeter of Square

harpazo

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Find Perimeter of a square whose side is 60 - x meters? See picture for answer. Correct?
sDraw_2018-05-06_16-34-30.png
 

TheJason

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The length of one side is an unknown value subtracted from 60 and multiplied by 4.

\(\displaystyle P = 4(\,side\,)\)

\(\displaystyle P = 4(60 - x)\)

\(\displaystyle P = (240 - 4x)\)

\(\displaystyle -240 = -4x\)

\(\displaystyle p = 60\)

Check

\(\displaystyle P = (240 - 4x)\)

\(\displaystyle -240 = -4(60)\)

Yes.

Next

\(\displaystyle P = 4(60 - x)\)

\(\displaystyle 0 = 4(60 - 60)\)

Yes
 
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harpazo

Pure Mathematics
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Good job!