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First find the slope of the given line . 5x + 8y =17

Put this into the 'y = mx + c '. form.

Hence 8y = -5x + 17

y =(-5/8)x +17/8

'-5/8' is the slope of the given line.

To find the perpendicular slope use the equation

mm' = -1

Hence substituting

(-5/8)m' = -1

m' = (-1)(-8/5) (Note the inversion of the numbers)

m' = 8/5 (Note the double negative multiplies out to a positive), = 1 3/5 = 1.6 is the slope of the perpendicular line.

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lenpollock

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1y ago

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