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OpenStudy (712noni):
Simplify the complex fraction x/x+4/(1/x + 1/x+4)
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hero (hero):
Hang on a min...
hero (hero):
The key is to figure out the LCD then multiply top and bottom by it: http://sketchtoy.com/67056519
OpenStudy (712noni):
Omg that helped so much!! Could you help me with one more??
hero (hero):
Sure
OpenStudy (712noni):
What is the standard deviation of the data set? round your answer to the nearest tenth. 81,85,82,93,85,84,95,87,88,91
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OpenStudy (712noni):
Answers A)2.7 B)4.4 C)11.6 D)19.5
hero (hero):
That's quite the shift from simplifying fractions. You should post this as a separate question.
OpenStudy (712noni):
Okay thank yiu
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