Can someone help me this is due in 5 min

Solve the equation 3x2 + 19x + 9 = 0 to the nearest tenth.

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

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?