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Mathematics, 16.06.2021 01:00 murtaghliam1
Calculate the sum of the first 20 terms of an arithmetic sequence with the 3rd term 8 and the 8th term 143.
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The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?
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Calculate the sum of the first 20 terms of an arithmetic sequence with the 3rd term 8 and the 8th te...
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