Mathematics, 07.09.2019 18:10 DesperatforanA

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour after the time that she first checked her outdoor thermometer. by 6 a. m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

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Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour after the...