50. Two airplanes leave the airport at the same time, flying in opposite directions. One plane flies 100 miles per hour faster than the other. They fly for 4 hours and end up 2,000 miles apart. How fast do they each fly? 150 mph and 250 mph 200 mph and 300 mph 300 mph and 400 mph 225 mph and 325 mph

First take the 2,000 miles, and subtract 400 from it (You do this because one plane is going 100 miles faster then the other for 4 hours) = 1,600 miles, then divide the 1,600 miles by 2 (because there are 2 planes moving apart from each other) you then get 800 miles. Take the 800 and divide that by 4 (they were flying for 4 hours) = 200 mph. We now know that one of the planes is flying 200 mph, and the other plane is flying 300 mph (because one is faster then the other by 100 mph, also don't forget your units) Hope this helps :)