Julie and Carlos each generated a real number equivalent to 1
64
Which expression could NOT belong to Julie or Carlos?
A
15.8-2
B
8 2.22
С
4 1.22
D
2 10.24

Need on this one asap im almost done with this subject

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 solution to this system of equations? y= 2x - 3.5 x - 2y = -14