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Please help me with question 1-91

Please help me with question 1-91-example-1
User Gbroekstg
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1 Answer

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Answer: If the lines have the same slope then they are parallel.

If the line is a vertical line then it has an undefined slope.

If there are lines with slopes (2/3) and (-3/2) then they are perpendicular.

Explanation:

User Jay Shepherd
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