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8 November, 12:50

Which expression is equivalent to - 21?

A. 9 - (-12)

B. 9 + (-12)

C. - 9+12

D. - 9-12

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Answers (2)
  1. 8 November, 13:09
    0
    Answer:a

    Step-by-step explanation:because - 9 + -12=_21
  2. 8 November, 13:12
    0
    D. - 9-12=-21

    Step-by-step explanation:

    Which expression is equivalent to - 21?

    A. 9 - (-12) = 9+12 = 21

    B. 9 + (-12) = 9-12 = - 3

    C. - 9+12 = - 9+12 = 3

    D. - 9-12=-21
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