Real I need help ppplllsss

Which of the following answers is 7/9 simplified? 7/9 2/9 11/9 2/7

What can you determine about the solutions of this system

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.