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Yesterday, 17:44

You receive 9 text messages in 12 minutes. What is the rate of text messages per hour?

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  1. Yesterday, 20:18
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    Remember 60 mins per hour

    9 per 12

    use ratio and proportion

    9:12=x:60

    9/12=x/60

    multiply both sides by 60

    540/12=x

    45=x

    the answer is 45

    a shortcut is yo know that 12 times 5=60 so

    9 times 5=answer since 12 times 5=60

    answer isi 45
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