xoxokaydavis2638
12.08.2020 •
Mathematics
A club with ten members is to choose three officers: president, vice-president, and secretary-treasurer. If each office is to be held by one person and no person can hold more than one office, in how many ways can those offices be filled?
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Ответ:
2)-3x+y = -5
1) - 2) => 11x = -11 => x = -1 => 3 + y = -5 => y = -8
solution is (-1,-8)