Chemistry

Chemistry, 01.04.2020 02:31, calibaby1220

Holly finds that (11m – 13n + 6mn) – (10m – 7n + 3mn) = m – 20n + 9mn. What error did Holly make?
A She only used the additive inverse of 10m when combining like terms.
B She added the polynomials instead of subtracting.
C She only used the additive inverses of –7n and 3mn when combining like terms.
D She did not combine all like terms.

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Holly finds that (11m – 13n + 6mn) – (10m – 7n + 3mn) = m – 20n + 9mn. What error did Holly make?

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