Point r(4,-5) is reflected across the y-axis to point s. point s is reflected across the x-axis to point t. what are the coordinates of point t. what are the coordinates of point t? use words and numbers to explain your answer.

Two cyclists 84 miles apart start riding toward each other at the samen time. one cycles 2 times as fast as the other. if they meet 4 hours later what is the speed (in miles) of the faster cyclists

Simplify each expression for 18, 20, and 21

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