If you had 8 items total on a menu how many combinations would there be

If f(x)=3 over x+2 - square root x-3 then f(7)=

Choose the domain & range of the relation shown in the graph: domain: -1, 0, 1, 2, 3 range: -3, -1, 0, 3 domain: -3, -1, 0, 3 range: -3, -1, 0, 3 domain: -3, -1, 0, 3 range: -1, 0, 1, 2, 3 domain: 3, 1, 0, 3 range: -1, 0, 1, 2, 3

For which rational expression is -2 an excluded value of x