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11 August, 22:14

A magazine as states that 4 out of 7 dentists prefer flash toothpaste. If 1400 dentists were surveyed, how many dentists recommended Flash toothpaste

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Answers (2)
  1. 11 August, 22:29
    0
    800

    Step-by-step explanation:

    4 out of 7 equals x out of 1400?

    4/7 = x/1400

    Cross multiply.

    7x = 4 * 1400

    Divide both sides by 7.

    x = 4 * 1400/7

    x = 4 * 200

    x = 800

    Answer: 800 dentists
  2. 11 August, 22:30
    0
    800

    Step-by-step explanation:

    1400 (the whole) / 7 (the whole) = 200 (the partial) 200*4=800
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