Question

Реши систему уравнений, используя способ сложения. (Сначала записывай наименьшие значения.) {xa+x=6xa+a=4 {x1= a1= {x2= a2= Смотреть ответ slanovtimur06 slanovtimur06 Ответ: {x1=−2a1=−4 {x2=3a2=1 Объяснение: Новые вопросы в Алгебра СРОЧНО!!! Докажите, что при любом целом значении х значение выражения делится на 10. (3x-1)(3x+1)+(x-4)^2-2x+5 ПОМОГИТЕ ПОЖАЛУЙСТА С АЛГЕБРОЙ, СРОЧНО Какие из представленных значений С и М соответствует уравнению C(X+M)=0, если X=-7. С и М - больше нуля: Выберите один ответ: OLM=7C=2 2. М=3 C=0 ф 0 … 3. M=0 c=0 в​ Необходимо решить уравнение: 2*(x+2х+3х+4x)=600 Выберите один ответ: 0 1. 20 0 2. 30 0 3. 4​ сколькими способами можно разложить 7 монет в 3 кармана? Предыдущий Следующий Вместе мы знаем больше Этот сайт использует cookies Политика Cookies . Вы можете указать условия хранения и доступ к cookies в своем браузере. КОМПАНИЯ Блог Карьера Условия пользования Авторское право Политика конфиденциальности Предпочтения cookie-файлов СООБЩЕСТВО Сообщество Brainly Brainly для школ и учителей Сообщество родителей Кодекс чести Правила сообщества Brainly Insights Стань помощником ПОМОЩЬ Зарегистрируйся Центр помощи Центр безопасности Договор о конфиденциальности полученной информации Установи приложение Brainly Скачай iOS-приложение Скачай для Android Школьные Знания.com PL: Brainly.pl ES: Brainly.lat PT: Brainly.com.br FR: Nosdevoirs.fr TR: Eodev.com RO: Brainly.ro ID: Brainly.co.id HI: Brainly.in PH: Brainly.ph US: Brainly.com (function() { window.process = window.process || {}; window.process.env = { NEXT_PUBLIC_PAYMENTS_ENDPOINT: "https://znanija.com/graphql/ru", NEXT_PUBLIC_HEADER_TOKEN_LONG: 'X-B-Token-Long', NEXT_PUBLIC_COOKIE_TOKEN_LONG: 'Zadanepl_cookie[Token][Long]', NEXT_PUBLIC_MARKET: "ru", NEXT_PUBLIC_BACKEND_MARKET: "ru", NEXT_PUBLIC_SPREEDLY_PKEY: "", NEXT_PUBLIC_PAYMENTOS_PKEY: "7a985100-4936-430e-83cf-af6ea914af9b", NEXT_PUBLIC_STRIPE_PKEY: "", NEXT_PUBLIC_BRAINTREE_PKEY: "", }; window.jsData = window.jsData || {}; window.jsData.domain = 'znanija.com'; window.jsData.siteName = 'Школьные Знания.com'; window.jsData.dateFormat = 'd.m.Y'; window.jsData.footerConfig = {"socialMedia":[{"icon":"youtube","url":"https:\/\/www.youtube.com\/channel\/UCQ929YFR7IGeKlv-nXn-Qug?view_as=subscriber","ariaLabel":"youTube link"}],"company":[{"titleTranslationKey":"blog_footer_link","url":"https:\/\/blog.znanija.com"},{"titleTranslationKey":"careers_footer_link","url":"https:\/\/careers.brainly.com\/"},{"titleTranslationKey":"terms_of_use_footer_link","url":"https:\/\/znanija.com\/pages\/prawila","noHref":true},{"titleTranslationKey":"copyright_policy_footer_link","url":"https:\/\/znanija.com\/avtorskoe-pravo"},{"titleTranslationKey":"privacy_policy_footer_link","url":"https:\/\/znanija.com\/pages\/politika_konfidentsialnosti"},{"titleTranslationKey":"cookie_privacy_footer_link","handlerKey":"cookie_privacy_footer_link"}],"community":[{"titleTranslationKey":"brainly_community_footer_link","url":"https:\/\/znanija.com\/soobshestvo"},{"titleTranslationKey":"for_schools_teachers_footer_link","url":"https:\/\/znanija.com\/shkola-i-uchitelia"},{"titleTranslationKey":"brainly_for_parents_footer_link","url":"https:\/\/znanija.com\/roditeli"},{"titleTranslationKey":"honor_code_footer_link","url":"https:\/\/znanija.com\/kodeks-chesti"},{"titleTranslationKey":"community_guidelines_footer_link","url":"https:\/\/znanija.com\/pravila-soobshestva","noHref":true},{"titleTranslationKey":"brainly_insights_footer_link","url":"https:\/\/brainly.com\/insights"},{"titleTranslationKey":"become_a_volunteer_footer_link","url":"https:\/\/znanija.com\/volontery"}],"helpColumn":[{"titleTranslationKey":"signup_footer_link","url":"https:\/\/znanija.com\/signup?entry=1","noHref":true},{"titleTranslationKey":"help_center_footer_link","url":"https:\/\/faq-ru.brainly.com"},{"titleTranslationKey":"safety_center_footer_link","url":"https:\/\/znanija.com\/centr-bezopasnosti"},{"titleTranslationKey":"responsible_disclosure_agreement_footer_link","url":"https:\/\/brainly.com\/responsible-disclosure-program"}]}; window.jsData.styleGuideAssets = { logo: { small: 'https://styleguide.znanija.com/images/logos/znanija-mobile-200611d052.svg', big: 'https://styleguide.znanija.com/images/logos/znanija-addd85e6f5.svg', plus: 'https://styleguide.znanija.com/images/logos/znanija-plus-337423fa26.svg' }, application_icons: { x180: 'https://styleguide.znanija.com/images/app-icons/znanija/180x180-1c0ebd78f4.png', } }; window.jsData.staticDomain = 'z-dn.net' window.jsData.displayAdsEnabled = false window.jsData.videoAdsEnabled = false window.jsData.newestQuestions = [{"id":53185200,"content":"\u0421\u0420\u041e\u0427\u041d\u041e!!! \n\u0414\u043e\u043a\u0430\u0436\u0438\u0442\u0435, \u0447\u0442\u043e \u043f\u0440\u0438 \u043b\u044e\u0431\u043e\u043c \u0446\u0435\u043b\u043e\u043c \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0438 \u0445 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u044f \u0434\u0435\u043b\u0438\u0442\u0441\u044f \u043d\u0430 10. 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Answer 1

Для начала решим систему уравнений методом сложения:

Система уравнений:

1. xa + x = 6
2. xa + a = 4

Сначала выразим x из первого уравнения: xa + x = 6 x(a + 1) = 6 x = 6 / (a + 1)

Теперь подставим выражение для x во второе уравнение: xa + a = 4 (6 / (a + 1))a + a = 4 6a / (a + 1) + a = 4

Приведём дробь к общему знаменателю: 6a + a(a + 1) = 4(a + 1) 6a + a^2 + a = 4a + 4

Упростим уравнение: a^2 + 3a - 4 = 0

Факторизуем квадратное уравнение: (a + 4)(a - 1) = 0

Получаем два возможных значения для 'a': a = -4 или a = 1

Теперь подставим найденные значения 'a' обратно в первое уравнение, чтобы найти соответствующие 'x':

1. При a = -4: x = 6 / (-4 + 1) = -2 x1 = -2, a1 = -4

2. При a = 1: x = 6 / (1 + 1) = 3 x2 = 3, a2 = 1

Итак, решение системы уравнений: x1 = -2, a1 = -4 x2 = 3, a2 = 1

Теперь перейдем к следующему вопросу:

Докажем, что при любом целом значении 'x' значение выражения (3x - 1)(3x + 1) + (x - 4)^2 - 2x + 5 делится на 10.

Раскроем скобки и упростим выражение: (3x - 1)(3x + 1) + (x - 4)^2 - 2x + 5 = 9x^2 - 1 + x^2 - 8x + 16 - 2x + 5 = 10x^2 - 10x + 20

Выражение 10x^2 - 10x + 20 делится на 10 без остатка для любого целого значения 'x', так как каждый член этого выражения делится на 10. Таким образом, утверждение верно.

Следующий вопрос:

Для уравнения C(X + M) = 0, если X = -7 и C > 0, M > 0, то значение C должно быть равно 2, так как C * (X + M) = 2 * (-7 + M) = 2M - 14. Если M > 0, то 2M - 14 не будет равно нулю, за исключением случая, когда M = 7, тогда 2 * 7 - 14 = 0.

Наконец, решим уравнение:

2 * (x + 2x + 3x + 4x) = 600 2 * 10x = 600 20x = 600 x = 600 / 20 x = 30

Итак, решение уравнения: x = 30.

Ответ на последний вопрос о разложении монет в карманы: Существует несколько способов рассадить 7 монет в 3 кармана. Например:

• 3 монеты в первом кармане, 3 монеты во втором и 1 монета в третьем.
• 2 монеты в первом кармане, 2 монеты во втором и 3 монеты в третьем.

И так далее. Общее количество способов можно подсчитать, используя комбинаторику.