The probability model below gives the chance of a student getting a certain letter grade as their final grade in a Physics class. Is this a valid probability model? Explain why or why not.

What is the solution to the system of equations? (–2, –8) (–1, –5) (0, –2) (2, 4)

Do some research and find a city that has experienced population growth. determine its population on january 1st of a certain year. write an exponential function to represent the city’s population, y, based on the number of years that pass, x after a period of exponential growth. describe the variables and numbers that you used in your equation.

Identify the polynomial. a2b - cd3 a. monomial b. binomial c. trinomial d. four-term polynomial e. five-term polynomial