Question

Помогите пожалуйста, срочно надо Реши систему уравнений методом подстановки: {y=−3x {x−y=34 Ответ: Смотреть ответ Koperfield9009 Koperfield9009 Ответ: {y=-3x {x-y=34 Вместо у подставляем -3x Получим: x-(-3x)=34 x+3x=34 4x=34 x=8,5 y=-3*8,5 y=-25,5 Ответ:(8,5;-25,5) Объяснение: Новые вопросы в Алгебра ПОМОГИТЕЕЕЕ!!!!!!!!!!!!!!!! 1) Промінь ОС розділив кут АОВ на два кути АОС і СОВ . Кут АОС більше кута СОВ на 94 градуса . Знайдіть ці кути , якщо кут … АОВ дорівнює 140 градусів .(2 б) 2) Довжина відрізка MN = 28 см . Точка Р - середина відрізка MN , а точка О - середина відрізка ОР . Знайдіть довжину відрізка ОN . (3 б) 3) &lt;(kp) = 96* . Промінь m - бісектриса &lt;(kp) , а промінь n - бісектриса &lt;(km) . Знайдіть &lt;(np) . (3 б) 4) Розв'яжіть нерівності 1) 0,2 х &gt;8 2) 4-3х≥8 +х 3) 7(х+1) &lt; -(2-5х) Помогите решить 6,4:х=4:5 4. Запишите выражение в виде степени с основанием а. 1) (a7)8 2) (a⁹)¹¹ 3) (a²7)¹³ 5) a⁸* (a³)¹¹ 6) (a³)⁵*(a³)⁸ 7) a21 *q24 4) (a²)4*a 8) (a⁹)3 *(a¹¹) … Дам 60баллов​ a) x⁶•x⁷ ; б) x⁹ :x³; B) (x⁴)²​ Предыдущий Следующий Вместе мы знаем больше Этот сайт использует cookies Политика Cookies . Вы можете указать условия хранения и доступ к cookies в своем браузере. 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Answer 1

Давайте решим систему уравнений методом подстановки:

Система уравнений:

1. y = -3x
2. x - y = 34

Сначала подставим значение y из первого уравнения во второе уравнение:

x - (-3x) = 34

Тепер упростим это уравнение:

x + 3x = 34

Сложим переменные x:

4x = 34

Теперь разделим обе стороны на 4, чтобы найти значение x:

4x / 4 = 34 / 4

x = 8.5

Теперь, когда у нас есть значение x, мы можем найти значение y, используя первое уравнение:

y = -3x y = -3 * 8.5 y = -25.5

Итак, решение системы уравнений:

x = 8.5 y = -25.5

Ответ: (8.5, -25.5)

Теперь перейдем к другим вопросам:

1. У нас есть кут АОВ, который равен 140 градусов. Кут АОС больше кута СОВ на 94 градуса. Давайте обозначим кут АОС как x и кут СОВ как y. Уравнение будет выглядеть следующим образом:

x = y + 94

Также известно, что сумма углов в треугольнике равна 180 градусов. Поэтому:

x + y + 140 = 180

Теперь мы можем решить эту систему уравнений для x и y.

2. Длина отрезка MN равна 28 см, и точка Р - середина отрезка MN. Точка О - середина отрезка OR. Давайте обозначим длину отрезка ON как x. Тогда длина отрезка OR равна x, и длина отрезка RP также равна x. Таким образом, мы можем записать:

MN = MO + OR + RP 28 = x + x + x

Теперь решите это уравнение для x.

3. Угол <(kp) равен 96 градусов. Прямая m - бисектриса угла <(kp), и прямая n - бисектриса угла <(km). Мы можем использовать свойство биссектрисы, которое гласит, что она делит угол пополам. Таким образом, угол <(km) равен 2 * 96 градусов, и угол <(np) равен половине угла <(km). Решите это уравнение.

4. Для решения неравенств, давайте по очереди рассмотрим каждое:

a) 0,2x > 8 Решим для x.

b) 4 - 3x ≥ 8 + x Решим для x.

c) 7(x + 1) < -(2 - 5x) Решим для x.

5. Задача: 6,4 : x = 4 : 5 Решите это уравнение для x.

6. Теперь рассмотрим выражения:

a) (a^7)^8 = a^(7 * 8) Упростите и найдите степень.

b) (a^9)^11 = a^(9 * 11) Упростите и найдите степень.