Work out he value of 2b+6 when b=9

Will give brainliest! aubrey was offered a job that paid a salary of $45,000 in its first year. the salary was set to increase by 2% per year every year. if aubrey worked at the job for 20 years, what was the total amount of money earned over the 20 years, to the nearest whole number?

Solve the system of equations. y= 2x y= x^2 - 15

I'll give brainliest if you answer right : )