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On the number line, points \(A=-2.75\) and \(B=1.25\) are given. What is the midpoint of the line segment \(AB\)?

Answer and explanation

Correct answer: -0.75

The midpoint of two points \(x_1\) and \(x_2\) is \(\frac{x_1+x_2}{2}\). Therefore, \(\frac{-2.75+1.25}{2}=\frac{-1.50}{2}=-0.75\), so option A is correct. Option B is only the sum of the two coordinates, not their midpoint. Exam tip: always divide the sum of the coordinates by 2 to find a midpoint.

Related tags

Number LineMidpointDecimalsRepresenting Real Numbers On The Number LinePolynomialsMathematicsClass 10 Mcq

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