What is the process by which he ocean floor sinks beneath a deep-ocean trench and back into the mantle known as?

Brian's school locker has a three-digit combination lock that can be set using the numbers 5 to 9 (including 5 and 9), without repeating a number. the probability that the locker code begins with a prime number is %. the probability that the last digit of the locker code is an odd number is %.

In a constitutional monarchy, the king or queen a. is a symbol of the nation b. runs for office c. controls the legislative branch d. has absolute control

Pythagorean theorem what is the value of x? x = 2 sides are 8 and 10