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    Question

    (51.99² - 19.05² )÷ ? = 14.11² -

    140.33
    A 42 Correct Answer Incorrect Answer
    B 56 Correct Answer Incorrect Answer
    C 67 Correct Answer Incorrect Answer
    D 33 Correct Answer Incorrect Answer
    E 17 Correct Answer Incorrect Answer

    Solution

    (51.99² - 19.05²) ÷ ? = 14.11² - 140.33 (52² - 19²) ÷ ? = 14² - 140 (2704 – 361) ÷ ? = 196 – 140 2343 ÷ ? = 56 ? = 2343/56 = 41.83 ≈ 42

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