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Mathematics 21 Online
OpenStudy (anonymous):

How do I find the mid point of EF?

OpenStudy (anonymous):

OpenStudy (mathmale):

Are you familiar with the midpoint formulas? \[x _{midpoint}=(x _{1}+x _{2})/2\]

OpenStudy (anonymous):

Yes, I am.

OpenStudy (anonymous):

@mathmale

OpenStudy (mathmale):

Please use that formula to find the x-coordinate of the midpoint. Create and use a similar formula to find the y-coordinate of the midpoint.

OpenStudy (anonymous):

I tried. (3, -2),(6,-1) 3 + 6/2 , -2 + 1/2 9/2, -1/2 (4.5, -0.5) But it says its wrong!!

Directrix (directrix):

@SephI I think you may have read the coordinates of the points E and F incorrectly. E --> (-2,3) F --> (1,6) The midpoint of segment EF has x-coordinate which is the average of -2 and 1. The midpoint of segment EF has y-coordinate which is the average of 3 and 6. Calculate this again and post what you get, okay?

OpenStudy (anonymous):

@Directrix , look at: http://prntscr.com/2ibudt Okay, so I have the points (2, 0) and (6, 0), right? I put it in the midpoint formula: m = (x1 + x1/2 , y1 + y2/2) m = 2 + 6/2, 0/2 (0/2 = 0, so I just exclude it.) m = 2 + 6/2 m = 8/2 m=4 But this is wrong.

Directrix (directrix):

>>Okay, so I have the points (2, 0) and (6, 0), right? No. You have the points W (0,2) and Y (6,6). @SephI

OpenStudy (anonymous):

Oh, okay. Umm. So: m = 0 + 6/2 and 2 + 6/2 m = 6/2 and 8/2 m = (3, 4)

Directrix (directrix):

That is what I got. >>> m = (3, 4)

OpenStudy (anonymous):

Thanks! :)

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