If u have 8 and u add 7 more then u multiple it bye 12 how much will u have in total

Which representation has a constant of variation of -2.5

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?

Use circumcenter theorem to solve for the given values