Question

2. The equation 3x + 4y + 5 = 0 and 4x - 3y + 7 = 0 represent perpendicular
lines.
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Answer 1

Slope of line = -(Coefficient of x)/(Coefficient of y)

Slope of first line = m1 = -3/4

Slope of second line = m2 = 4/3

m1*m2 = -1

Therefore the lines are perpendicular

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