It takes four trips around the track to make a mile jack paddled his bike around the track 24 times it took him 30 minutes how many miles per hour was jack pedaling

He went around 24 times and 4 times is a mile so 24/4 will tell us how many miles he biked. He biked 6 miles in thirty minutes. The formula distance = rate(time) will tell you how fast he is going.

6 = r(1/2)    divide each side by 1/2 (The time has to be in hours)
12 = r 
So he was going 12 miles an hour.