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10 May, 15:31

A question on a math test asked students to "Simplify the expression 7 - 3k + 9k - 23". Kate answered "2 (3k - 8) ". Is she correct or incorrect? Explain. If incorrect, give the correct answer.

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  1. 10 May, 16:10
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    Answer: kate's answer is incorrect, correct answer is 2 (-3k-8)

    Step-by-step explanation:

    From the question, 7-3k+9k-23

    Step 1: (Put like terms together)

    =-3k+9k-23+7

    Then you get: - 6k-16 which can be written as 2 (-3k-8).
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