What type of angle is this​

How do i do this? i don’t understand

In the diagram below? p is circumscribed about quadrilateral abcd. what is the value of x

Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance