algebra 2

A. consider the finite arithmetic series 10+13+16+...+31. how many terms are in it? Explain.
B. evaluate the series

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  1. for your AS
    a = 10
    d = 3
    term(n) = a+(n-1)d

    so 31 = 10 + (n-1)(3)
    21 = 3(n-1)
    7 = n-1
    n = 8

    there are 8 terms

    sum(8) = (8/2)(first + last)
    = 4(10+31) = 164

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  2. THANK YOU!!!

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  3. 16. You have a series of four chemical reactions (1--> 2 --> 3 --> 4). How do you calculate the H2 if you know the other H values?

    H2 = (H1)(H3)/(H4)
    H2 = H4 (H1 + H3)
    H2 = H1 + H3 + H4
    H2 = H1 + H3 H4

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