Find the domain and range of f(x)=2x+cos x

If a || b and e || f , what if the value of y ?

If f(x)=x+7 and g(x)=1/x what is (fog)(x)

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.