Need help solving these please help!

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters .

Find the midpoint m of z1=(8+5i) and z2=(12+3i)

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.