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Mathematics, 30.11.2020 18:30 andrea732

Which of the following pairs of lines are perpendicular? y=3x-4 and y=-1/2 x-5
y=1/2 and y=2x-1
y=x and y=-x
Please help with this. 60 points for this!

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Which of the following pairs of lines are perpendicular? y=3x-4 and y=-1/2 x-5
y=1/2 and y=2x...
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