Jack's doctor bill was $300. His insurance paid 80% of the bill. What amount must Jack pay?

Which expression is the factorization of x^2+10+21

The sum of five and a number n is at least 12

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.