Find the value of x.

Which of the following are accepted without proof in a logical system? check all that apply.

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?

Someone me what is the area of this figure? 18m 18m 8m 16m