twilaswift
The perimeter of the rectangle is fifty-four feet. What is x?
A rectangle is shown. The length is labeled fifteen feet and width is labeled x.
thirty-nine feet
twenty-seven feet
twenty-four feet
twelve feet
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bloodrain
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i need the picture to figure it out :|
ParthKohli
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The formula for the perimeter is \(P =2(\rm length + width)\).
ParthKohli
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Since the length is \(15\) and the width is \(x\), we have this equation:\[2(15 + x) = 54\]Solve for \(x\).
twilaswift
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|dw:1357571093615:dw|
bloodrain
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ok figure it out based on the info parth gave (unless you want me to explain more)
bloodrain
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would you like more explanation?
twilaswift
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Yes, please.
ParthKohli
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OK, so do you know that the perimeter is the sum of ALL sides?
ParthKohli
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Notice that opposite sides in a rectangle are equal.|dw:1357571260853:dw|
ParthKohli
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So the sum of sides will be \(15 + 15 + x + x\). But it is also given that the sum of all sides (perimeter) is \(54\).
twilaswift
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Ok.
ParthKohli
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So solve the equation \(15 + 15 + x + x = 54\)?
bloodrain
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I have to go study for exams for a few min, so let parth finish =3
twilaswift
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You have to figure out what x is, right?
ParthKohli
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Yes! =)
twilaswift
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OK so you divide 15 right?
bloodrain
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I can't get on my study page o_o no don't divide by 15 subtract 15+15 from the perimeter and then divide by 2
bloodrain
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that should be your answer
twilaswift
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7.2?
bloodrain
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no i think you did it wrong let me try
bloodrain
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54-30=? then divide ? by 2 to get answer
twilaswift
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11
bloodrain
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o_o no, sorry but very close
twilaswift
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12
bloodrain
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yes :D
bloodrain
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how did you get 11?
bloodrain
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just wondering
twilaswift
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22 divided by 2
bloodrain
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ok then? whatever i wish you good luck on your hw or whatever it is your doing