Jamal was riding his bike home at a speed of 12 mph. On his trip out, he had traveled 8 miles away from his house. He has been traveling for a half hour at this speed.
The answer is 2. he is 8 miles away from his home and has been traveling back for half an hour. If he was traveling 12mph, half of that is 6miles. So if he is traveling 6 miles per half an hour then 8-6 is 2. Hope this helps!!