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OpenStudy (anonymous):
Given ABCD, AC = 28, and AE = 3x - 7, find the value of x.
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myininaya (myininaya):
I don't know what ABCD is?
OpenStudy (anonymous):
this is ABCD
myininaya (myininaya):
assuming it is a parallelogram, those diagonals bisect each other. So then AE would be half of AC. like AE+AE=AC 2AE=AC...
OpenStudy (anonymous):
So does 14 sound right?
myininaya (myininaya):
idk did you do 2AE first?
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myininaya (myininaya):
what is 2(3x-7)?
OpenStudy (anonymous):
-1
myininaya (myininaya):
how did you get -1 from 2(3x-7)?
myininaya (myininaya):
x is a variable is varies so 2(3x-7) will also vary
myininaya (myininaya):
2(3x)=? 2(-7)=?
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myininaya (myininaya):
\[2(3x+7)=2(3x+-7)=2(3x)+2(-7)=\]
myininaya (myininaya):
what is 2(3)?
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