What is the recursive rule for the following sequence: -5, -3, -1, 1…

125 tickets were sold for the jazz band concert for a total of $1,022. students tickets cost $6 each, and general admission tickets cost $10 each. how many of each kind of tickets were sold?

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

Having a hard time understanding this question (see attachment).