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lana66690 [7]
3 years ago
6

XY has one endpoint at X(-7, -2) and its midpoint is M(-3,7). What are the coordinates of Y?

Mathematics
1 answer:
Monica [59]3 years ago
6 0

Answer: (1,16)

Step-by-step explanation:

The coordinates of a midpoint are given by the midpoint formula:

(x_m, y_m) = (\frac{x_1+x_2}{2},\frac{y_1+y_2}{2}) where  (x_m,y_m) is the ordered pair for the midpoint,  (x_1,y_1)  is the ordered pair for the first endpoint, and (x_2,y_2) is the ordered pair for the second endpoint.

In this problem, the midpoint is given as (x_m,y_m) = (-3,7)

The known endpoint of XY is X = (x_1, y_1) = (-7, -2)

Y remains unknown so Y =  (x_2, y_2).

If the midpoint is given as (-3,7) we can compare the x value and the y value individually.

-3 = \frac{-7+x_2}{2}

Solving for x_2, we get x_2 = 1.

7 = \frac{-2+y_2}{2}

Solving for y_2, we get y_2 = 16.

Thus, the coordinates of Y are (1,16)

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