Choose the best description of these mathematical writings: x+3x + 3 = 8 Both are expressions

Both are equations

X+3 is an expression, X + 3 = 8 is an equation

X+3 is an equation, X + 3 = 8 is an expression

Suppose that a disk drive has 5,000 cylinders, numbered 0 to 4,999. the drive is currently serving a request at cylinder 2,150, and the previous request was at cylinder 1,805. the queue of pending requests, in fifo order, is: 2069, 1212, 2296, 2800, 544, 1618, 356, 1523, 4965, 3681