Find the value of k for which the lines k – 5y + 4 = 0 and 2 – y + 15 = 0 are ⊥ to each other.

k = -2

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k = -5

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k = -7/2

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k = 5/2

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k = -5/2

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Solution

The correct option is E
k = -5/2

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