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29 December, 13:51

The temperature is 60? F. The temperature will decrease by 3? F each hour. Let h be the number of hours. When will the temperature be below 32? F? Write an inequality for this problem.

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  1. 29 December, 17:00
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    60 - 3h < 32

    This is your equation. Now to solve, subtract 60 from both sides.

    - 3h < 32 - 60

    - 3h < - 28

    Divide by - 3 on both sides. This will flip the inequality.

    h > 9.333 (the 3s repeat).

    After 9 and 1/3 hours (AKA 9 hours 20 minutes), the temperature will be below 32 degrees Fahrenheit.
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