Guide :High School

Determine all values of c so that the lines cy+5x=7 and . cy-3x=6 are perpendicular.

Determine all values of c so that the lines cy+5x=7 and . cy-3x=6 are perpendicular.
For the equations of the line given as Ax + By = C, the slopes can be calculated by -A / B. Further, for the perpendicular lines, the slopes should be the negative reciprocals of each other. The equation below shows the relationship,                                (-5 / c) x (3 / c) = -1c may take the value of + or - sqrt 15.  ...

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