F(x)= x-9 , g(x) = 3x^2 what is (f+g)(x) , (f-g)(x) , (fg)(x)

Henry's butcher shop uses an electronic scale that measures to 1/100 of a pound. which is the most accurate measurement based on the limitations of the scale that might be found on a package of meat sold by henry?

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

Which answer choice is it? is it the first ,second,third or fourth giving 40 points for whoever answers correctly you