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egoroff_w [7]
3 years ago
14

If two lines are perpendicular describe the relationship between their slopes

Mathematics
1 answer:
Aloiza [94]3 years ago
7 0
Perpendicular lines have slopes that are negative reciprocals. example: line a has a slope of 2/3, line b has a slope if -3/2 if they are perpendicular.
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How many arrangements can be made using 2 letters of the word HYPERBOLAS if no letter is to be used more than once?
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Answer:

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Step-by-step explanation:

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THe number of arrangements would be 2 permutation 10. We need the formula for permutation. That is:

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nPr=\frac{n!}{(n-r)!}\\\\_{10}P_{2}=\frac{10!}{(10-2)!}\\=\frac{10!}{8!}\\=\frac{10*9*8!}{8!}\\=10*9\\=90

So, there can be 90 arrangements

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