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What is 9 and 10? What's the CORECT answer?

What is 9 and 10? What's the CORECT answer?-example-1
User Ashiina
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9. C, because subtracting a negative number "changes" the sign to +
10. C, for the same reason. The equation could be rewritten as -4.2+6.9, which equals 2.7
User Pcofre
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