Question

The midpoint of AB is M (5,5). If the coordinates of A are (7,8), what are the coordinates of B?

Answer 1

Answer:

X Midpoint= 5 Y Midpoint= 7.5

Step-by-step explanation:

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Answer 2

Answer:

(9, 11)

Step-by-step explanation:

To find the coordinate B use the midpoint formula

$m = (\frac{x1 + x2}{2},\frac{y1+y2}{2})$

Now plug in x1 = 5 and y1 = 5

Now it should look like this

$\frac{5+x2}{2}=7$  AND  $\frac{5+y2}{2}=8$

Now solve

For the first one multiply each side by 2

5 + x2 = 14

Next subtract each side by 5 making x2 = 9

Now for y2 do the same thing

5 + y2 = 16

y2 = 11