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14 May, 18:56

Find the sum of the first 10

terms.

40,37,34,31, ...

+1
Answers (2)
  1. 14 May, 19:10
    0
    It seems each number is 3 less than the previous number.

    We must sum these 10 numbers

    40, 37, 34, 31, 28, 25, 22, 19, 16, 13

    The sum would equal the average of the middle 2 numbers times 10.

    (28 + 25) / 2 = 53 / 2 = 26.5

    We multiply by 10 because there are 10 numbers and this equals

    265
  2. 14 May, 19:18
    0
    40+37+34+31+28+25+22+19+16+13=265
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