salvatorerose
salvatorerose
30-12-2017
Mathematics
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extremely important!!
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tynollette
tynollette
30-12-2017
-8≥-5x+2>-38
-10≥-5x>-40
2≤x<8 (when divided by a negative number, the sign changes from ≥ or > to ≤ or <)
so x is between 2 (include 2, a solid dot) and 8 (doesn't include 8, a hollow bubble)
the third choice is correct.
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