What is the value of p? 13^2 = p

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

Describe a situation that you could represent with the inequality x< 17

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible