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In the standard (x,y) coordinate plane, point M with coordinates (5,4) is the midpoint of AB, and B has coordinates (7,3). What are the coordinates of a

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sqdancefan

Answer:

  A = (3, 5)

Step-by-step explanation:

Point M is the average of the endpoint coordinates, so is ...

  M = (A+B)/2

Solving for A gives . . .

  A = 2M -B

  A = 2(5, 4) -(7, 3) = (10-7, 8-3)

  A = (3, 5)

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