Let's turn this into a fraction using the given information we already have.

We want the denominator, or the bottom part of the fraction, to be 1 in order for us to have a unit rate.
This fraction can be simplified if we divide both the numerator and denominator by 3.
Numerator: 18/3 = 6
Denominator: 3/3 = 1
Now we have

Any number divided by 1 is equal to that number.

Thus, your unit rate is 6 miles per hour.
Have an awesome day! :)
~AgentCozmo4, Junior Moderator
Answer:
Rounding to the nearest cent, it cost $30 per gallon.
B BBbBbBBbBbBbBbbBbBbBbbBbBbBBbBbBb
Lets find the common demoninator of them all, Its 30! so 1/3 of 30= 10
3/5 of 30= 18 7/10 of 30= 21 1/2 of 30 = 15
So that means that 7/10 is the biggest out of them all, That means carlos ran the greatest distance!