Anew internet phone company advertises that you can call any country in the world for 3¢ per minute. you regularly call your friend in india and talk to her for 20 minutes. how much would the phone call cost?

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

Does anyone know how to do geometryme with this problem