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Allisa [31]
3 years ago
15

-3x + 3 (5x + 17) = -93 Show all work

Mathematics
1 answer:
UkoKoshka [18]3 years ago
3 0
-3x + 15x + 51 = -93

12x = - 42

x = -3.5
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Step-by-step explanation:

We want to find the sum of the first 20 terms of the arithmetic sequence:

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The sum of an arithmetic sequence is given by:

\displaystyle S=\frac{k}{2}(a+x_k)

Where <em>k</em> is the number of terms, <em>a</em> is the initial term, and <em>x</em>_<em>k</em> is the last term.

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