Question

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Answer 1

(3,3)

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Answer 2

B(3,3)

Explanation:

Midpoint = (2,5)

A = (x₁,y₁) = (1,7)

M(x,y) =
`((x1+x2)/(2) , (y1+y2)/(2))`

M(2,5) =
`((1+x2)/(2) , (7+y2)/(2) )`

Writing the equations separately for convenience

1)
`(1+x2)/(2) = 2`

=> 1+x2 = 4

=> x₂ = 3

2)
`(7+y2)/(2) =5`

=> 7+y2 = 10

=> y₂ = 3

So, the coordinate is,

B = (x₂,y₂) = (3,3)