If A is 5 and B is 12, what is C?

Taking algebra two apex courses and need with these questions

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

Amovie streaming service charges it’s customers $15 a month. martina has $98 saved up. will she have any money left over if she pays for the maximum amount of months she can afford? explain.