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Yuliya22 [10]
2 years ago
13

The coordinates of midpoint M and endpoint Q of a segment are M(–7, 8) and Q(–19, 30). Find the coordinates of the other endpoin

t. (–31, 52) (–13, 19) (5, –14) (15, –4)
Mathematics
1 answer:
Margaret [11]2 years ago
4 0

Answer:

Step-by-step explanation:

Use the midpoint formula to solve:

M=(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})

We know the midpoint and one set of coordinates, so filling those in:

(-7,8)=(\frac{x+(-19)}{2},\frac{y+30}{2})

Since the -7 is the x coordinate of the midpoint, we set the x part of the equation equal to -7 and solve for x, and then do the same for y. The 2 equations are:

-7=\frac{x-19}{2}  and  8=\frac{y+30}{2}  We solve each one of these to get the x and y coordinates of the other endpoint. In both cases, multiply both sides of the equations by 2 and then solve by either adding or subtracting.

-14 = x - 19 so

5 = x

16 = y + 30 so

-14 = y

The coordinates of the other endpoint are (5, -14)

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