Question

M(9, 8) is the midpoint of mc005-1.jpg The coordinates of S are (10, 10). What are the coordinates of R? a (8, 6) b (9.5, 9) c (11, 12) d (18, 16)

Answer 1

THE ANSWER IS A

Explanation:

or maybe I'm wrong sorry

Answer 2

Let point R be (x₁, y₁) and Point S(10, 10) be (x₂, y₂)

Midpoint is given by
`( (x_1+x_2)/(2), (y_1+y_2)/(2))`

We know that the midpoint is (9, 8)
We will use this to evaluate the value of (x₁, y₁)


`(x_1+x_2)/(2)=9`

`(x_1+10)/(2)=9`

`x_1+10=18`

`x_1=8`


`(y_1+y_2)/(2)=8`

`(y_1+10)/(2)=8`

`y_1+10=16`

`y_1=6`

Point R (x₁, y₁) = (8, 6)

Correct answer: A