The distance from Phoenix to Tucson is 120 miles. A car made the journey in 1 hour and 45 minutes. What was the average speed of the car in miles per hour?

Question

photon336 · Answer

so the first thing you need to do is this: 

$$\frac{ distance }{ time } = speed $$

photon336 · Answer

$$\frac{ distance  }{ time } = \frac{ miles }{ hour }$$

photon336 · Answer

so he traveled 120 miles in 1.75 hours. based on what I've shown you above how would you put this together?

baileedoherty · Answer

how did you get 1.75 for the time?

frostyflame · Answer

.75 is 3/4 of 1, so 3/4 of an hour is 45 minuets so what Photon is says is that you need to divide 120miles by the amount of hours which is 1.75

baileedoherty · Answer

I was able to get the correct answer after he explained it. now im just confused on the time part.

frostyflame · Answer

a hour is 60 minutes so 1/4 of an hour is 15 min and 3/4 is 45 minutes but 1/4 of an 1 is .25 so 3/4 is .75

baileedoherty · Answer

that makes more sense. but what would something like 2 hours and 3 minutes be?

frostyflame · Answer

so its still be 2 hours but the three minutes 1/20 of an hour

baileedoherty · Answer

how would I change it into a decimal?

frostyflame · Answer

it would be .05 and in a calculator type in 1/20 divided by 1

baileedoherty · Answer

okay thank you sorry its been awhile sense ive been in math

frostyflame · Answer

of course :)