Please PLEASE help with these two math problems

1. 7^x ÷ 7^y =
2. z^10x^y ÷ z^5 =

Asequence {an} is defined recursively, with a1 = 1, a2 = 2 and, for n > 2, an = an-1 an-2 . find the term a241

If g(x) is an odd function, which function must be an even function?

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?