Y= 2x + 4 2x - y = 6 solve the system of equations using substitution. a) (2, 8) b) (2, -8) c) (10, 24) d) no solution

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?