75% of n is 45. n is what percent of 90?​

Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9

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.

7x^2-9x+5=0 find the discriminant and number of real solutions