Which set of ordered pairs in the form of (x, y) does not represent a function of x? {(-1,2), (3,-,,2} {(-1,-,,,2)} {(-1,,-,,5)} }(-1,,,-,0)}

In the following situation, determine whether you are asked to determine the number of permutations or combinations. then do the calculation how many ways are there to pick a starting five from a basketball team of twelve members? a. permutation; ps - 2520 b. combination; 1c, - 792 c. combination: 2cs - 2520 d. permutation; ps - 95040

Need this asap if anyone can i would be very grateful. if you could show workings that would really

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