The work to find the answers, the answers are in red

Two sides of a triangle mesure 20cm and 30cm. what is the measure of the third side

Pls math have no ideamultiply and simppify. 2x^2y^3z^2 • 4xy^4x^2

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.