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The points (-2, -5), (2, -2), (8, a) are...

The points (-2, -5), (2, -2), (8, a) are collinear, find the value of a

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Since the given points (-2,-5),(2,-2),(8,a) are collinear.
`implies4+10+2a+16-40+2a=0`
`implies 4a-10=0omplies a= 5/2`.
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