For a function to have an inverse function it must what?

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

Ten times the square of a non-zero number is eqaul to ninety times the number

The fraction 7/9 is equivalent to a percent that is greater than 100%. truefalse