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OpenStudy (anonymous):
who know this problem (-2.6)+7=7+(-2.6)
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OpenStudy (anonymous):
what is the question?
OpenStudy (anonymous):
But what do you have to do with that?
OpenStudy (anonymous):
Commutative property of addition. It means that addends can be added in any order and the sum is always the same.
OpenStudy (anonymous):
\[\sqrt{7}\]
OpenStudy (anonymous):
7 isn't a perfect square, so you would have to put it into your calculator to find an approximation.
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OpenStudy (anonymous):
how i do that
OpenStudy (anonymous):
\[\sqrt{7}\approx 2.645751311\]
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