Pls help! -15 pts

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What is (28 + 7 + 6 + 3) x 1/2 show your work

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?

In the triangles, bc =de and ac fe. if the mzc is greater than the mze, then ab isdfelth