Posted by JOE on Saturday, February 6, 2010 at 2:36pm.
You end up with a right triangle with the two legs being 12 miles and 5 miles.
Use the Pythagorean theorem, with c representing the hypotenuse.
a^2 + b^2 = c^2
12^2 + 5^2 = c^2
144 + 25 = c^2
169 = c^2
13 = c
Ok, thanks. But how did you get 12 and 5?
He traveled 15 miles east and then 10 miles west.
15  10 = 5
He traveled 12 miles south.
That gives us a triangle.
He started at point A. Went to point B, and then to point C. He ended at point D. You need to find the distance betwen point A and point D.
B_______<___15____<______A (start)

v

12

v
___>____10__>___D
C
Physics  To reach city A, you travel north for 2.00 hours covering 80.0 miles. ...
Math  A boat travels 74 miles on a course with direction 34 degrees and then ...
Math  A surfer drives his dune buggy out into the sand dunes.He follows his ...
math  the group covered the first 70 miles in 10 hours. then it doubled its ...
maths  a boat travel 5 miles due south and then 11 miles due east. how far is ...
Algebra  If your car gets 32 miles per gallon of gas you need to travel 278 ...
algebra  If your car gets 32 miles per gallon of gas you need to travel 278 ...
algebra  For the class your car gets 32 miles per gallon of gas you need to ...
Science  The first speed limits for cars were two miles per hour in a city and ...
Story Problem  Ann drove 8 miles east, 4 miles south, 3 miles east, 6 miles ...