Find k, if the line 4x - y = 1 is perpendicular to the line 5x - ky = – McqOptions

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1.	Find k, if the line 4x - y = 1 is perpendicular to the line 5x - ky = 2?
A.	20
B.	-20
C.	4
D.	-4
Answer» C. 4

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