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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?

Landon wrote that 3−2.6=4. which statement about his answer is true?

What number line represents the solution set for the inequality -1/2 greater than or equal to 4