Ryan ran a race at a pace of 6 miles per hour. They ran a total of 9 miles. If you solve using the equation 6x=9 , which unit should be used for the missing value? Enter 1 for miles, 2 for hours, or 3 for miles per hour.(1 point)

To solve the equation 6x = 9 for the missing value, we need to divide both sides by 6. This will give us:

x = 9/6 = 3/2 = 1.5

Since the equation 6x = 9 gives us the value of x in hours, the unit that should be used for the missing value is 2 for hours.