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anonymous

  • one year ago

Find the length of a line segment with endpoints of 19 and -39. please help!

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  1. Vocaloid
    • one year ago
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    just subtract the two numbers 19-(-39) = ?

  2. anonymous
    • one year ago
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    Oh no, I meant 19-(-39) = ? Thank you!

  3. mathstudent55
    • one year ago
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    Here is your line segment. |dw:1437273269810:dw|

  4. mathstudent55
    • one year ago
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    |dw:1437273365894:dw|

  5. anonymous
    • one year ago
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    I just add 39 and 19?

  6. mathstudent55
    • one year ago
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    The distance between any two points on a number line is the absolute value of the difference of their coordinates. For points with coordinates a and b, the distance between them is \(|a - b| \).

  7. mathstudent55
    • one year ago
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    Correct. Just add. Also it makes no difference which point you use first and which you use second. The absolute value makes sure the answer is always positive, which any distance is. |19 - (-39)| = |19 + 39| = |58| = 58 |-39 - 19| = |-58| = 58

  8. anonymous
    • one year ago
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    Thank you, I appreciate everyones help! It all makes sense now

  9. mathstudent55
    • one year ago
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    You're welcome.

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