Предмет: Математика, автор: Hocok335

Корабль в первый  день проплыл d км,во ворой день в 2 раза больше чем в первый день а в третий на 40 км меньше чем во второй день.Сколько километров проплыл корабль за все 3 дня.

Ответы

Автор ответа: Олеся9006
0
d+2d+(2d-40)=5d-40(км) проплыл за 3 дня
Автор ответа: лёля5k
0
первый день-d(км)
второй день-в 2 раза больше, чем в первый
в третий день-на 40(км) меньше чем во второй
сколько всего?
составим уравнение
d+(d×2)+(d×2-40)
можно заменить d
d=30
30+(30×2)+(30×2-40)=30+60+20=110
надеюсь помогла)
Похожие вопросы
Предмет: Английский язык, автор: mersedersbenz624
Exercise 134: Choose the correct form of pronoun.
1. I fell and hurt ........... when I was coming down the stairs. (me/myl myself)
2. I can't do ........... about this problem. (something / anything/ nothing)
3. The car turned over and ended up on ........... side. (it/their /its)
4............ left this bag here by mistake. (Someone / Anyone / No one)
5. I know the details because I checked ............ (it/you/them)
6. Some relatives of ........... live in Italy. (you/hers / me)
7. ......... would feel the same as me in this situation. (Everyone /Someome/Neome)
8. Did you cook it ...........? (myself / yourself / themselves)
9. I couldn't find Martin's phone ............ (somewhere / everywhere / anywhere)
10. She got ........... advice from her colleague. (an/some / any)
11. She created the whole thing by ............ (herself / yourself / myself)
12. The presents were in ........... boxes under the New Year Tree. (it /its/their)
13. Nowhere in the country is as beautiful as in ........... place. (it / this/these)
14. They really enjoyed ........... last night. (theyselves / theirselves/themselves)
15. Whose car is ............ ? (that / those / these)
16. The company didn't pay for ............ (his / her/its)
17. I can't trust .......... besides you. (somebody / anybody / nobody)
18. I'm not going to apologize because I've done ....... wrong. (something / anything / nothing)
19............ could hear what I said. (Nobody / Nowhere / Nothing)
20. I met....
when we were in the same class at school. (it / his / him)​
Предмет: Математика, автор: mrrstlin
Предмет: Обществознание, автор: alina245245