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Ссссссссссрррррррррррррррооооооочччччччччччнннннннннннооооооооооо 1)Реши систему уравнений {0,2k=13 k+m=−9 2)Реши систему: {x=3 17x−y=11 3)Реши систему уравнений {a=6 2a−b=12 а= b= 4)Найди точку пересечения графиков, заданных формулами 10x+2y=81 и y=−2,5x без построения. 5)Реши систему уравнений методом подстановки. {−z−2v+2=5 z=−7−v z= v= Смотреть ответ Vera852006v2e0r0a6 Vera852006v2e0r0a6 Ответ: 1) {0,2к=13 {к+m= -9 {k= -9-m {0,2(-9-m)=13 {-1,8-0,2m=13 {0,2m= -13-1,8 {0,2m=-14,8 {m=74 {k=-83 2) {x=3 {17x-y=11 {51-y=11 {y=40 3) {a=6 {2a-b=12 {12-b=12 {b=0 4) {10х+2у=81 {у=-2,5х {10х+2(-2,5х)=81 {10х-5х=81 {5х=81 {х=16,2 {у=13,7 5) {-z-2v+2=5 {z=-7-v {7+v-2v+2=5 {-v=-4 {v=4 {z=-11 Новые вопросы в Алгебра Помогитееееееее!!!!!!! Помогите пжжжжжж!!!!!!! Сколько из чисел 14;46;51;64;76;29;31;155;207;77 простыми числами? 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Answer 1

Решим по порядку каждую из систем уравнений:

1. Решение системы уравнений: {0.2k = 13 {k + m = -9

Первое уравнение: 0.2k = 13 Делим обе стороны на 0.2: k = 13 / 0.2 k = 65

Подставим значение k во второе уравнение: 65 + m = -9

Выразим m: m = -9 - 65 m = -74

Таким образом, решение системы уравнений: k = 65, m = -74.

2. Решение системы уравнений: {x = 3 {17x - y = 11

Первое уравнение: x = 3 Заменим x во втором уравнении на 3: 17 * 3 - y = 11 51 - y = 11

Выразим y: y = 51 - 11 y = 40

Таким образом, решение системы уравнений: x = 3, y = 40.

3. Решение системы уравнений: {a = 6 {2a - b = 12

Первое уравнение: a = 6 Подставим значение a во второе уравнение: 2 * 6 - b = 12 12 - b = 12

Выразим b: b = 12 - 12 b = 0

Таким образом, решение системы уравнений: a = 6, b = 0.

4. Найдем точку пересечения графиков заданных уравнениями: {10x + 2y = 81 {y = -2.5x

Подставим второе уравнение в первое: 10x + 2(-2.5x) = 81 10x - 5x = 81 5x = 81

Решим уравнение относительно x: x = 81 / 5 x = 16.2

Теперь найдем y, подставив значение x во второе уравнение: y = -2.5 * 16.2 y = -40.5

Таким образом, точка пересечения графиков - (16.2, -40.5).

5. Решение системы уравнений методом подстановки: {-z - 2v + 2 = 5 {z = -7 - v {z = v =

Подставим второе уравнение в первое: -(-7 - v) - 2v + 2 = 5 7 + v - 2v + 2 = 5 -v + 9 = 5 -v = 5 - 9 -v = -4

Теперь найдем v: v = 4

Используем найденное значение v, чтобы найти z: z = -7 - v z = -7 - 4 z = -11

Таким образом, решение системы уравнений: z = -11, v = 4.

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