On a recent road trip, Mr. Yost drove 210 miles in 3 1/2hours.

1 answer

To find Mr. Yost's average speed, you divide the total distance he drove by the total time it took him.

To convert the time from the mixed number format of 3 1/2 hours to an improper fraction, you multiply the whole number (3) by the denominator (2) and add the numerator (1). So, 3 1/2 becomes 7/2.

Now, you can calculate the average speed:

Average speed = Total distance / Total time
Average speed = 210 miles / (7/2) hours
Average speed = 210 miles * (2/7) hours

Now, simplify the fraction:

Average speed = 420/7
Average speed = 60 miles per hour

So, Mr. Yost's average speed on the road trip was 60 miles per hour.