Bill drove 315 miles in 7 hours, alisha drove 235 miles in 5 hours, and joanne drove 414 miles in 9 hours. which person drove at an average speed of 47 miles per hour?

Alisha  is the person who drove at a average speed of 47 miles per hour

If you divide the miles by the hours on each amount of miles. you find that 235 divided by 5  is 47 therefore the answer is alisha

a. is correct

47 - 90 = 43

43 - 180 = x

x = 137