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Mathematics
Mathematics
Problem
The line
4
x
+
5
y
−
7
=
0
4x + 5y - 7 = 0
4
x
+
5
y
−
7
=
0
is perpendicular to the line
k
x
−
8
y
+
3
=
0
kx - 8y + 3 = 0
k
x
−
8
y
+
3
=
0
. Find the value of
k
k
k
.
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