Thanks!Quote:

The points A, B and C have Co-ordinates (5,1)(p,7)(8,2) respectively.

Quote:

Given that AB is twice the distance of AC. Calculate the possible values of p.

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- Dec 29th 2009, 05:20 AMBabyMiloCo-ordinatesQuote:

The points A, B and C have Co-ordinates (5,1)(p,7)(8,2) respectively.

Quote:

Given that AB is twice the distance of AC. Calculate the possible values of p.

- Dec 29th 2009, 05:42 AMArchie Meade
$\displaystyle You\ have\ two\ solutions.$

$\displaystyle Calculate\ the\ length\ of\ AC\ using\ Pythagoras'\ theorem.$

$\displaystyle Then\ B\ lies\ on\ a\ circle\ of\ twice\ that\ radius.$

$\displaystyle The\ y\ co-ordinate\ of\ both\ points\ is\ 7.$

$\displaystyle Solve\ for\ the\ two\ values\ of\ x.$