(80 points for all these questions) if you could for all these and you

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

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?

What makes a trapezoid an isosceles trapezoid?