**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.**...