Here it is a second time. Please I just want sleep :)

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

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 is the approximate value of  q  in the equation below? –1.613–1.5220.5853.079