Question

7. Mis the midpoint of QR and M has

coordinates (-2, 6). Q has coordinates
(8, -10). What are the coordinates of R?
nges to the original content are the responsibility of the instructor.

I need help on number 7 please

Answer 1

R(- 12, 22 )

Explanation:

Using the midpoint formula

`(1)/(2)`(8 +
`x_(R)` ) =
`x_(M)` = - 2

Multiply both sides by 2

8 +
`x_(R)` = - 4 ( subtract 8 from both sides )

`x_(R)` = - 12

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`(1)/(2)`(- 10 +
`y_(R)` ) =
`y_(M)` = 6

Multiply both sides by 2

- 10 +
`y_(R)` = 12 ( add 10 to both sides )

`y_(R)` = 22

The coordinates of R = (- 12, 22 )