The straight lines`5x-9y-12=0andmx+10y=2` are perpendicular to each other , state which of the following is the value of m:A. 18B. `-9`C. 9D. `-18`

The straight lines`5x-9y-12=0andmx+10y=2` are perpendicular to each ot

1.	The straight lines`5x-9y-12=0andmx+10y=2` are perpendicular to each other , state which of the following is the value of m:A. 18B. `-9`C. 9D. `-18`
Answer» Correct Answer - A

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