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November 16th, 2017, 01:34 PM   #1
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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?
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Last edited by GIjoefan1976; November 16th, 2017 at 01:39 PM.
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November 16th, 2017, 01:41 PM   #2
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here is the second one

this one is where distance formula was used
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November 16th, 2017, 02:13 PM   #3
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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 $\displaystyle \sqrt{(x_1-y_1)^2+(x_2-y_2)^2}$.
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November 16th, 2017, 02:28 PM   #4
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Quote:
Originally Posted by mathman View Post
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 $\displaystyle \sqrt{(x_1-y_1)^2+(x_2-y_2)^2}$.
hello, maybe it is called something else but it looks sorta like the one that you typed out but I believe you would go solve by solving the math between your x's and then divide by 2. then do the math between your y's then divide by 2

then you square your x solution and square your y solution add that new sum together and then find the square root of that.
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November 16th, 2017, 02:42 PM   #5
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so like this I think is one way, unless of course my math is wrong
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November 16th, 2017, 02:57 PM   #6
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(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 ?
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November 16th, 2017, 04:26 PM   #7
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Quote:
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(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 ?
Thanks to you both... and thanks for your Great looking post skeeter. Hmm I think I get it now thanks to your math? So for a maybe I am meant to see it as two different sets of points (0,0) and (253,124) ?

Thanks again!!!!
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November 22nd, 2017, 06:18 PM   #8
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Quote:
Originally Posted by mathman View Post
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 $\displaystyle \sqrt{(x_1-y_1)^2+(x_2-y_2)^2}$.
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.
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