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November 16th, 2017, 01:34 PM  #1 
Senior Member Joined: Feb 2016 From: seattle Posts: 371 Thanks: 10  Distance and Midpoint Formulas....Brie took off from Oldfield Airport
I was able to get the answer for the second one using the distance formula...but if I am to use the midpoint formula for the first one I am not getting the right answer. Am I wrong thinking it would be the midpoint formula to use or would I use a different formula?
Last edited by GIjoefan1976; November 16th, 2017 at 01:39 PM. 
November 16th, 2017, 01:41 PM  #2 
Senior Member Joined: Feb 2016 From: seattle Posts: 371 Thanks: 10  here is the second one
this one is where distance formula was used

November 16th, 2017, 02:13 PM  #3 
Global Moderator Joined: May 2007 Posts: 6,398 Thanks: 546 
I don't know what you mean by "midpoint formula". To get distance between 2 points in a a plane $\displaystyle (x_1,y_1)\ and\ (x_2,y_2) $, just compute $\displaystyle \sqrt{(x_1y_1)^2+(x_2y_2)^2}$.

November 16th, 2017, 02:28 PM  #4  
Senior Member Joined: Feb 2016 From: seattle Posts: 371 Thanks: 10  Quote:
then you square your x solution and square your y solution add that new sum together and then find the square root of that.  
November 16th, 2017, 02:42 PM  #5 
Senior Member Joined: Feb 2016 From: seattle Posts: 371 Thanks: 10 
so like this I think is one way, unless of course my math is wrong

November 16th, 2017, 02:57 PM  #6 
Math Team Joined: Jul 2011 From: Texas Posts: 2,678 Thanks: 1339  (a) $OB = \sqrt{253^2+124^2}$ (b) you correctly answered ... $BP = 331.6$ The last question in the problem statement wants to know "which airport is closer to Brie's position"? so, which is closer to B? O or P ? 
November 16th, 2017, 04:26 PM  #7  
Senior Member Joined: Feb 2016 From: seattle Posts: 371 Thanks: 10  Quote:
Thanks again!!!!  
November 22nd, 2017, 06:18 PM  #8 
Senior Member Joined: Oct 2013 From: New York, USA Posts: 573 Thanks: 79  I learned three formulas for a pair of points, which are slope, distance, and midpoint. The midpoint formula just takes the mean of the x values and the mean of the y values. When there are coordinates for three points (call them x, y, and z) and we want to find out which of y and z is closest to x, the midpoint formula isn't useful.


Tags 
airport, distance, formulasbrie, midpoint, oldfield 
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