Answer:
4, tell me if wrong
Step-by-step explanation:
c² = b² + a²
now, 5x5 = 25
3 x 3 = 9
25 - 9 =
4
a
Ian's pattern: 15, 31, 63, and 127.
Nicole's pattern: 485, 1457, and 4373.
Have a nice rest of your day :)