Which pair of ratios form a proportion? a) 7: 11 and 35: 44 b) 9: 12 and 27: 48 c) 11: 7 and 33: 21 d) 15: 8 and 45: 16

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.