помогите пожалуйста срочно. Created by gaitur1302. matematika-ru

Х- правильно решенных задачу - неправильно решенных задачх+у=12 задачи, присланные на конкурс5х-3у=36 баллы, полученные ученикомсистема уравнений{x+y=12 {x=12-y5x-3y=36 5(12-y)-3y=3660-5y-3y=36y=3x=9(9+3=12. 5*9-3*3=45-9=36)ответ: правильно решенных задач 9.неправильно решенных задач 3 Реклама Реклама zunna zunna Решается методом подбора. 9 правильно решенных задач - 9*5=45 баллов Оставшиеся 3 задачи неправильные - 3*3=9 баллов (вычли) Общее кол-во баллов 45-9=36 Реклама Реклама Новые вопросы в Математика знайти похідну від функції x+x^1/2+ x^1/3-2.5 Помогите позязя срочно дам 15 балов!!!!! 9 сынып алгебра Бжб-2 ПОМОГИТЕЕЕ 412. Используя основное свойство дроби, найдите значение х: Вычислите sina,tga,ctga, если cosa=2/3, 3П/2< a < 2П cos2x-3cosx-2=0 как это решать я не понимаю x+3=2(x+3)x как рішети Доказать тождество: cosx-cos2x-1/sinx-sin2x=ctgx Помогите пожалуйста!! Вычислите sina,tga,ctga, если cosa= -2/3, П < a < 3П/2 Предыдущий Следующий Реклама - это не так уж плохо Реклама - это не так уж плохо Понимаем - вы пришли сюда не за рекламой. Но она помогает нам предоставлять бесплатный доступ к Знаниям. Пожалуйста, внесите наш сайт в список разрешенных. ОК, разблокирую рекламу на Знаниях! Вместе мы знаем больше Этот сайт использует cookies Политика Cookies . Вы можете указать условия хранения и доступ к cookies в своем браузере. КОМПАНИЯ О нас Блог Карьера Условия пользования Авторское право Политика конфиденциальности Политика использования файлов cookie 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.jsData = window.jsData || {}; window.jsData.domain = 'znanija.com'; window.jsData.dateFormat = 'd.m.Y'; 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', plusSmall: 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помогите пожалуйста срочно...

gaitur1302 @gaitur1302

October 2021 1 8 Report

помогите пожалуйста срочно

Answers & Comments

zunna Х- правильно решенных задач
у - неправильно решенных задач
х+у=12 задачи, присланные на конкурс

5х-3у=36 баллы, полученные учеником
система уравнений
{x+y=12 {x=12-y
5x-3y=36 5(12-y)-3y=36

60-5y-3y=36
y=3
x=9
(9+3=12. 5*9-3*3=45-9=36)
ответ: правильно решенных задач 9.
неправильно решенных задач 3

zunna zunna

Решается методом подбора. 9 правильно решенных задач - 9*5=45 баллов Оставшиеся 3 задачи неправильные - 3*3=9 баллов (вычли) Общее кол-во баллов 45-9=36