## elizabethann509 2 years ago I understand that this should be really simple but I don't understand how to do this. Could someone please explain? Thank you. A van will drive ten miles north, 15 miles south, and then five miles north again. The van gets 33 miles per gallon, and there is one gallon of gas left in the tank. Compute the relative distance and the total distance. Then decide if there is enough fuel for the trip.

1. JA1

okay maybe i'm wrong but wouldt you just add together the distances?

2. dumbcow

yep then see if thats less than 33 miles

3. JA1

well that was easy :D

4. dumbcow

of course "relative distance" means distance from your start to where you end up

5. JA1

oh lol

6. JA1

i just did the obvious

7. elizabethann509

Sorry. I left out details. I am supposed to write equations for this. This is what I'm supposed to do. I guess it would help if I included this lol write two equations for each scenario. One equation should be to compute the relative distance. The other equation should be to compute the total distance traveled for the same scenario using absolute value. Finally, given the information about the fuel economy, or the miles per gallon (mpg) for each car, calculate whether or not you have enough fuel for each trip.

8. elizabethann509

I don't know how to order the equations, otherwise I could solve this

9. dumbcow

not sure what equations they are looking for. you are just summing up the numbers north implies positive south implies negative relative --> sum (x) total --> sum (|x|)