A) \[x+3y=21\]
B) \[2x-3y=7\]
C) \[x+7y=31\]
D) \[2x+3y=21\]
E) \[x-3y=21\]
Correct Answer: C
Solution :
Equation of perpendicular diagonal to\[7x-y+8=0\]is\[x+7y=\lambda \]which passes through\[(-4,5)\]. \[\therefore \] \[\lambda =31\] So, equation of another diagonal is \[x+7y=31\]You need to login to perform this action.
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