Plot point C(2,7). If M is the midpoint of CD , what are the coordinates of D?

The coordinates of D is (-4,-9)

Step-by-step explanation:

Given

C = (2,7)

M=(-1,-1)  ----- Missing part of question

Required

Determine the coordinates of D

Let the coordinates of D be (x₂,y₂)

We'll solve this question using mid point formula;

Where

   and    

Put these values in the formula

By comparison;

 and

Multiply both sides by 2

Subtract 2 from both sides

Multiply both sides by 2

Subtract 7 from both sides

Hence, the coordinates of D is (-4,-9)

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step-by-step explanation:

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