If f(x) = 4 – x2 and g(x) = 6x, which expression is equivalent to (9 - 1)(3)?

Afitness center has 2 membership plans one has a low dollar sign up fee of 15 dollars and costs 38 dollars per month to join. a second plan has a higher sign up fee of 78 dollars but a lower monthly fee of 31 dollars for what number of days of the month is the coat the same