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Solve the equation for x, where x is a real number (5 points): -2x^2 + 7x + 21 = 16
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Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from 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?
Answers: 3
Solve the equation for x, where x is a real number (5 points): -2x^2 + 7x + 21 = 16...
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