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neverforgetvivistee

  • 3 years ago

finding missing endpoints: is there a way to do it algebraically? http://www.youtube.com/watch?v=d51p_8xQQZ0 so you can draw a number line to see how far each number is from each other, but is there a faster way to do it?

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  1. satellite73
    • 3 years ago
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    ignore this video. you can find the endpoint using algebra or just thinking. you have an actual problem to solve?

  2. neverforgetvivistee
    • 3 years ago
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    Endpoint: (−9, −1), midpoint: (8, 14)

  3. satellite73
    • 3 years ago
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    you want algebra or think method?

  4. neverforgetvivistee
    • 3 years ago
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    algebra

  5. neverforgetvivistee
    • 3 years ago
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    or whatever you were typing

  6. satellite73
    • 3 years ago
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    we can do both for first coordinate solve \[\frac{x-9}{2}=8\] and for second solve \[\frac{y-1}{2}=14\]

  7. satellite73
    • 3 years ago
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    because midpoint you use \[\frac{x_1+x_2}{2}\] for the first coordinate and \[\frac{y_1+y_2}{2}\] for the second. so if you know the answer you can find the first or second coordinate

  8. neverforgetvivistee
    • 3 years ago
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    oh i see i got it right, you subtracted because they're negative?

  9. neverforgetvivistee
    • 3 years ago
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    thank you :'} you're very good at math don't ever stop what you're doing

  10. satellite73
    • 3 years ago
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    yes i "subtracted" because both were negative. if they had been positive i would have added.

  11. satellite73
    • 3 years ago
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    thank you for the compliment

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