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chapb75
04.02.2020 •
Mathematics
Holly finds that (11m – 13n + 6mn) – (10m – 7n + 3mn) = m – 20n + 9mn. what error did holly make? a)he 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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Ответ:
a) She only used the additive inverse of 10m when combining like terms.
Step-by-step explanation:
Given : Holly finds that![(11m-13n+6mn)-(10m-7n+3mn)=m-20n+9mn](/tpl/images/0501/5655/67718.png)
First we open the bracket by multiplying minus sign in it, we get
Combining like terms we get, we get
When we compare the correct answer to the answer given by Holly, the first term is same in both the answers,
Therefore, She only used the additive inverse of 10m when combining like terms.
Ответ:
The full explanation is here. https://www.mathpapa.com/algebra-calculator.html?q=(3x%2B2)%2F4%3E%E2%88%9220
Step-by-step explanation: