Предмет: Математика, автор: 4zhe55rd62

Сумма чисел а, b и с равна 102. Найдите эти числа, если а:b=3:2 и
b:c=4:7.

Ответы

Автор ответа: slava23yasya
1

Відповідь:

Покрокове пояснення:

Потрібно всі числа звести до одного відношення. У першому відношенні помножимо числа на 2:

a:b = 6:4, b:c = 4:7 - прирівняли значення при b.

a : b : c = 6 : 4 : 7 - частини на які треба розділити число 102.

6+4+7 = 17 частин

102: 17 = 6 - розмір однієї частини.

А = 6 * 6 = 36

В = 6 * 4 = 24

С = 6 * 7 = 42

Перевірка:

36+24+42 = 102

Похожие вопросы
Предмет: Английский язык, автор: elizabethkarpeeva
помогите пожалуйста с заданием, дам мног балов
Read the conversation and write the correct verb form: Infinitive or Gerund.
Alan: What are you reading, George? George: Um, I'd like (1. join) a school club but I can't (2. choose). Could you (3. help) me, please? Alan: Sure! You don't need . (4. read) this! If you enjoy ... (5. play) team sports, the Rugby Club is the best for you! You need... George: Thank you but I'm not good at ... (6. run). Active sport is not my passion. Alan: Really? Then, maybe you like... (7. cook)? Why don't you join the Cooking Club? George: Actually, I hate... (8. cook) know that I need ... (9. learn) it as I'll have to ... (10. cook) for myself when I go to university but not this year. I prefer . (11. do) something more serious. I also love ... (12. experiment); Alan: If you want (13. experiment), you should... (14. try) the Science Society. I joined it last year and I've decided ... (15. sign up) again as a lab assistant this year. They experiment with a wide variety of things. My favourites are egg drops, mousetrap race cars, and making your very own crystals. Mr Berton encourages students (16. understand) how things work in our life and they usually demonstrate excellent academic performance. George: Sounds great! What need I. (17. do)? Alan: You needn't P(18. do) anything special. You ought to ... (19. go) to the first meeting to sign up for the society. George: Thank you very much for your advice! Oh, when is th meeting? Alan: You must. (20. be) in the Science Lab at 10.00 a.m tomorrow.​
Предмет: Русский язык, автор: Varra2009
Предмет: Геометрия, автор: kimbap15