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Mathematics 13 Online
OpenStudy (anonymous):

Multiply. –3 • 7 = A. –21 B. –11 C. 11 D. 21 a

OpenStudy (anonymous):

d

OpenStudy (anonymous):

There's one negative sign. So you will add a negative sign before the product of 3 and 7.

OpenStudy (anonymous):

negative times positive = negative

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