9) The coordinates of the mid points of points (2,3)and (4,7)are(3, b) then the
value of b is
A) 2
B) 4
C) 5
D) 10
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Answer:
Answer
(x
1
,y
1
)=(2,3) and (x
2
,y
2
)=(4,7)
by midpoint formula, coordinates of mid point =(
2
x
1
+x
2
,
2
y
1
+y
2
)
=(
2
2+4
,
2
3+7
)=(
2
6
,
2
10
)=(3,5).
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