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Inessa [10]
3 years ago
11

I need help !!!!! Please

Mathematics
1 answer:
Viktor [21]3 years ago
8 0
The answer is c, since the square root of 81 is positive or negative 9.
Hope this helps
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Anyone can answer this
kolezko [41]

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Solve by elimination: x-2y= -7 ; 4x+2y= 22
svp [43]
Apply the elimination method to the 2y terms since they are opposites & therefore can eliminate. Combine the rest of the terms, vertically.

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or

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4 years ago
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Kipish [7]
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What is the radius of a sphere whose surface area is 100cm²?
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