Can someone solve this -17-5(x+3)=3x

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(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.

Geometry - finding area of regular polygons and sectors (check my math, i can’t find the error)