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Mathematics 7 Online
OpenStudy (anonymous):

Hi everyone, i'm new here and hoping someone could give me an answer and how they got it on..... What is the product of -9 and -15?

OpenStudy (precal):

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OpenStudy (precal):

a negative number times a negative number is a positive number 9 times 15 is 135 because you have 9 groups of 15

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