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24 February, 03:04

The first term of an arithmetic sequence is 4 and the tenth term is 67. What is the common difference? Show your work or explain your answer.

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  1. 24 February, 05:41
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    Step-by-step explanation:

    a1 = 4

    a2 = 4 + c

    a3 = 4 + 2c

    a10 = 4 + 9c = 67 - -> c = 7

    (1, 4); (10, 67)

    m = (y2 - y1) / (x2 - x1) = (67 - 4) / (10 - 1) = 63/9 = 7
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