Asked by Sarah

The midpoint of BC is M(-10,-16). One endpoint is B(-1,8). What are the coordinates of C?
Answered by helper
The midpoint of BC is M(-10,-16)
B(-1,8) C = ?

xm = 1/2(x1 + x2), ym = 1/2(y1 + y2)

-10 = 1/2(-1 + x2)
-20 = -1 + x2
-19 = x2

-16 = 1/2(8 + y2)
-32 = 8 + y2
-40 = y2

C(-19, -40)

check my math
Answered by Sarah
Thank you!!!!!!!!!!!!!!!!!! Life SAVER!!!!!
Answered by helper
You're welcome :)
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