Six less than twice a number x is four

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?

These tables represent a quadratic function with a vertex at (0, -1). what is the average rate of change for the interval from x = 9 to x = 10?

Mr.walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?