Help pls with this trigonometry question

Find the balance at the end of 4 years if 1000 is deposited at the rate of

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

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?