Найдите область допустимых значений функции y=2-5sin(5x-П/4)

2  а) 5a - 3b - 8a + 12b = 5a - 8a - 3b + 12b = -3a + 9b. б) 16c + (3c - 2) - (5c + 7) = 16c + 3c - 2 - 5c - 7 = 16c + 3c - 5c - 2 - 7 = 14c - 9. в) 7 - 3(6y - 4) = 7 - 18y + 12 = 7 + 12 - 18y = 19 - 18y. 3. если x = 5, то  0,5x - 4 и 0,6x - 3   =  0,5 * 5 - 4 и 0,6 * 5 - 3;   2,5 - 4 = -1,5; 3-3 = 0; -1,5 < 0;   0,5x - 4 < 0,6x - 3 4.6,3х – 4 – 3(7,2х + 0,3) =  6,3х – 4 – 21,6х - 0,9 =  6,3х  – 21,6х - 4 - 0,9 = -15,3х - 4,9 5. (13 + 22)* 2 - 5*5 = 75 - 25 = 50 см

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