Please help me with this

Write the system of equations represented by the matrix. 0 1 2 4 -2 3 6 9 1 0 1 3

Explain how you do each step what term makes it inconsistent y=2x - 4 ?

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?