Sarah fenced in her backyard. the perimeter of the yard is 18 feet, and the width of the yard is 4 feet. use the perimeter formula to find the length of the rectangular yard in inches: p = 2l + 2w.

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.