Divide both sides of the equation by the same factor. -9/-9 = 81/-9. simplify x= -9 and the answer is x= -9
The answer would be A. He should use the mean because it is in the center of the data. I hope this helped ^^
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I KNOWW THE ANSWER!!
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I believe the answer is C. I'd have to work this out on paper to be certain, but from what i worked out mentally, i got C. lol
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