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lopez_hatesmath

  • 2 years ago

Find the sum of the given arithmetic series. 27 + 20 + 13 + 6 + ... + (–36)

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  1. Compassionate
    • 2 years ago
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    It's decreasing by seven each time. That is: 27+ 20+ 13+ 6 - 1 - 8 - 15 - 22 - 29 - 36 This simplifies too: 66 - 111

  2. Compassionate
    • 2 years ago
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    The "... +(-36) Means we're only going to -36, once we get there we stop.

  3. Compassionate
    • 2 years ago
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    Can you do the last part by yourself?

  4. Kaederfds
    • 2 years ago
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    10/2 x (27-36) = 5.(-9) = -45

  5. Compassionate
    • 2 years ago
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    Kae, don't give out the answer.

  6. lopez_hatesmath
    • 2 years ago
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    pshhhh thankss :)

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