The expression P(1+r)n models the amount of money in an account where P is the initial amount, r is the interest rate, and n is the number of years. The table shows the amount of money that Catie and Michael have after a number of years.

Sandy is upgrading her internet service. fast internet charges $20 for installation and $52.45 per month. quick internet has free installation but charges $57.45 per month. part 1 out of 2 complete the equation that can be used to find the number of months after which the internet service would cost the same. use the variable x to represent the number of months of internet service purchased.