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4 January, 10:23

Which expression is equivalent to 4a + 10? 4 (a + 5) 2 (2a + 8) 4 (a + 8) 2 (2a + 5)

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Answers (2)
  1. 4 January, 11:59
    0
    Answer is d: 2 (2a+5)
  2. 4 January, 13:18
    0
    One way is to just multply them out but the easier way is to undistribute to see the answer

    so

    remember distributive property

    a (b+c) = ab+ac

    4a+10 is obvously a product

    the common factor is 2 so

    4a+10=2 (2a) + 2 (5)

    undistribute 2

    2 (2a) + 2 (5) = 2 (2a+5)

    reverse distribute

    answer is last option
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