Distance and midpoint formulas crisis

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buckkl
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Distance and midpoint formulas crisis

Postby buckkl » Tue Feb 14, 2012 9:09 am

I wasnt sure if this was algebra or pre calc but i'm lost. In reference to the distance and midpoint formulas. My book says suppose that P is an endpoint of a segment PQ and M is the midpoint of PQ. Find the coordinates of endpoint Q. I have a few problems like this to do. Heres the first one. P (7,-4) and M (8,5). How do I solve these? I've tried everything I can think of and the book is no help.

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stapel_eliz
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Postby stapel_eliz » Tue Feb 14, 2012 1:06 pm

buckkl wrote:...suppose that P is an endpoint of a segment PQ and M is the midpoint of PQ. Find the coordinates of endpoint Q. I have a few problems like this to do. Heres the first one. P (7,-4) and M (8,5). How do I solve these?

Plug the three points -- (7, -4), (8, 5), and (x, y) -- into the Midpoint Formula, and solve for x and y, like is shown here. :wink:


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