Prentice Hall. 18, Mike and Adam left a bus terminal at the same time and traveled
in opposite directions. Mike's bus was in heavy traffic and had to
travel 20 mi/h slower than Adam's bus. After 3 hours, their buses
were 270 miles apart. How fast was each bus going?
19.) Two trains left a station at the same time. One traveled north at a certain
speed and the other traveled south at twice the speed. After 4 hours, the
trains were 600 miles apart. How fast was each train traveling?
20. Find four consecutive odd integers whose sum is 336.
21. The length of a rectangle is 5 cm greater than its width. The perimeter
is 58 cm. Find the dimensions of the rectangle.