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Л1В2
@Л1В2
June 2022
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Упростить выражение и вычислить:
6 1/9 (t-9) + 2 5/9(18-t), если t=0,2
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prettypushkova
Verified answer
6 1/9 * (t - 9) + 2 5/9 * (18 - t) = 55/9 * t - 55/9 * 9 + 23/9 * 18 - 23/9 * t = 55/9t - 55 + 46 - 23/9t = (55/9t - 23/9t) - (55 - 46) = 32/9t - 9
если t = 0,2 = 1/5
32/9 * 1/5 - 9 = 32/45 - 9 = - 8 целых 13/45
Ответ: (- 8 целых 13/45).
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Answers & Comments
Verified answer
6 1/9 * (t - 9) + 2 5/9 * (18 - t) = 55/9 * t - 55/9 * 9 + 23/9 * 18 - 23/9 * t = 55/9t - 55 + 46 - 23/9t = (55/9t - 23/9t) - (55 - 46) = 32/9t - 9если t = 0,2 = 1/5
32/9 * 1/5 - 9 = 32/45 - 9 = - 8 целых 13/45
Ответ: (- 8 целых 13/45).