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The graphs of the two linear equations ax + by = c and bx - ay = c, where a, b and c are all not equal to zero,

A. are parallel
B. intersect at one point but not perpendicular
C. intersect at two points
D. perpendicular

Respuesta :

ArmanaLaRana
let us find the slopes of the two lines 

a x + b y = c , slope m1 = - a / b 

b x - a y = c , slope m2 = b / a 

m1*m2 = (- a / b)(b / a) = - 1 

The two lines are perpendicular 
21stanley
im pretty sure it would be d

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