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OpenStudy (rainbow_rocks03):
PLZ HELP AND EXPLAIN... Each side of a square is (7 + 3x) units. Which is the perimeter of the square?
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OpenStudy (calculusxy):
a square has four sides and the perimeter is the total measurement of all of the side lengths.
\[s + s + s + s = 4s \]
\[4(7+ 3x) = ? \]
OpenStudy (calculusxy):
s = side length
OpenStudy (rainbow_rocks03):
So...(7+3x)=10 ?
OpenStudy (calculusxy):
no i meant for you to solve \(4(7+3x)\)
OpenStudy (rainbow_rocks03):
so like this...4*7=28+3x=31? IDK
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OpenStudy (rainbow_rocks03):
@calculusxy ??
OpenStudy (rainbow_rocks03):
@calculusxy
OpenStudy (calculusxy):
\[4(7 - 3x) = 4(7) + 4(-3x) = 28 - 12x\]
OpenStudy (calculusxy):
you're distributing the four to the terms in the parenthesis
OpenStudy (calculusxy):
got it ?
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OpenStudy (rainbow_rocks03):
ugh...no :(
OpenStudy (calculusxy):
where are you stuck?
OpenStudy (rainbow_rocks03):
I am stuck to where I get my answer.
OpenStudy (calculusxy):
|dw:1444861901005:dw|
OpenStudy (rainbow_rocks03):
So (7+3x) 4 times?So I multiply it 4 times?
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OpenStudy (calculusxy):
yeah that's why it's \(4 \times (7 + 3x)\)
OpenStudy (rainbow_rocks03):
thats what i said!
OpenStudy (rainbow_rocks03):
look @calculusxy here are my answer choices...
OpenStudy (rainbow_rocks03):
A. 7 + 12x units, B. 28 + 3x units, C. 28 + 12x units, D. 49 + 9 units.
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