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2 December, 23:29

Write the interval notation of the compound inequality

6b - 1 ≤ 41 or 2b + 1 ≥ 11

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  1. 2 December, 23:42
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    6b - 1 ≤ 41 2b + 1 ≥ 11

    6b ≤ 41 + 1 2b ≥ 11 - 1

    6b ≤ 42 2b ≥ 10

    b ≤ 42/6 b ≥ 10/2

    b ≤ 7 b ≥ 5

    Therefore b ≤ 7 or b ≥ 5.

    We can join the two together to form the interval. 5 ≤ b ≤ 7
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