The midpoint of AB is M(0, –4). If the coordinates of A are (-8, -7), what are the coordinates of B? Please answer ASAP :( 10 points

Question

The midpoint of AB is M(0, –4). If the coordinates of A are (-8, -7), what are the coordinates of B?
Please answer ASAP 🙁 10 points

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Khải Quang 4 years 2021-08-25T04:47:06+00:00 1 Answers 8 views 0

Answers ( )

  1. thienan
    0
    2021-08-25T04:48:28+00:00
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    Answer:

                B(8, -1)

    Step-by-step explanation:

    M(0, -4) being the midpoint of AB means that  x_M-x_A=x_B-x_M

    0-(-8)=x_B-0\\\\x_B=8

    and   y_M-y_A=y_B-y_M

    -4-(-7)=y_B-(-4)\\\\-4+7=y_B+4\\\\y_B=3-4\\\\y_B=-1

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