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Line pb is a line segment on a number line. It has endpoints at -2 and 12. What is the coordinate of its midpoint.

My answer would be the total length pf pb is 14 units so the midpoint would be 7.

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2 answers

  1. the length is correct. But the midpoint is -2+7 = 5.

    5 = -2+7 = 12-7

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  2. if three points a,b and c are collinear and b is between a and c then ab+bc=ac

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