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Вопрос по алгебре:
Найдите длинну медианы треугольника АВС, проведенную из вершин В, если А(4;0;-2), В(-16;8;-18), С(2;-4;-6).-
Автор:
peters
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Ответ:
Объяснение:1) находим координаты т.М(х;у;z)-- середины АС:
Х=(4+2)/2=3, y=(0-4)/2=-2,z=(-2-6)/2=-4. M(3;-2;-4)
2)Длина медианы ВМ=√(-16-3)²+(8+2)²+(-18+4)² =√19²+10²+14² =√361+100+196 =√657.
Еще 4 ненужных тебе вопроса, но это важно для поиска
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Вопрос по алгебре:
розкласти на множники квадратний тричлен x2+6x+5-
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Вопрос по информатике:
Найдите ошибку в программе
Program Name;
Var A, B: integer;
Rezult: char;
Begin
A:=6
B:=3
Rezult:=A div B
end-
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Вопрос по английскому языку:
Пожалуйста помогите решить тесты! Очень нужно!! Буду очень благодарна!!!
1. He ___ fishing every weekend when he was a schoolboy but
now he is too busy
a) was used to go c) got used to go
b) used to go
d) used to going
2. I have started drinking coffee recently. I never ___ it before
a) used to like
c) was using to like
b) was used to like d) used to liking
3. James ___ study hard until he understood that it was necessary
a) did not get used to c) used not to
b) didn't use to
d) wasn't used to
4. When we climbed up the mountain we ____ the clouds beneath
a) might have seen c) could see
b) may saw
d) can saw
5. Helen decided to go shopping yesterday though she ___ home
a) could stay
c) could have stayed
b) might stay
d) could has stayed
6. The concert was cancelled last week. I ___ there anyway
because I was ill.
a) could have not gone c) didn't go
b) couldn't go
d) couldn't have gone
7. You didn't answer when I phoned you yesterday. You ___ asleep
a) has been
c) must be
b) must have been d) could be
8 Your room is very well ventilated. So you ___ hot yesterday
a) can't have been c) can have not be
b) couldn't be
d) could haven't be
9 We ___ watch cartoons, we've nothing else to do
a) may be
c) as well may
b) might as well
d) as well can
10. You ___ us last night. It wasn't necessary
a) must not visit c ) needn't have visited
b) needn't visit d ) didn't need to visit
11 Jane ___ al 6 o'clock when she was younger
a) used to waking up c) was use to wake up
b) got used to wake up d) used to wake up
12 We ___ that we ____ you yesterday. Unfortunately we didn't
see you
a) wish, had seen c) wish, saw
b) hope, saw
d) hope, had seen
13. Had she known that you were there, she ___ you
a) would meet
c) could meet
b) would have met d) might meet
14. He ___ hard when he was only a schoolboy
a) got used to studying c) got used to study
b) was used to study d) used to studying
15. I prefer studying at home ___ studying at school
a) than
c) to
b) then
d) that
16. He ___ stay home tonight
a) would rather to c) would rather
b) will better
d) would be better to
17. James would rather that we ___ leave now, but we must go to
work
a) didn't
b) haven’t
c) don't
d) can’t
18.I ___ drink tea, I prefer coffee.
a) wouldn't rather c) rather not
b) don't rather
d) would rather not
19. He would rather ___ with us in London last week.
a) has stayed
c) stayed
b) have stayed
d) to stay
20. My teacher would rather that I ____ more than I do.
a) study
c) studied
b) am study
d) am studying
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Ответов: 1
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Вопрос по математике:
4. Чему равна 5/6часть корня уравнения x:3=6?
5. В ящике 16 одинаковых шариков. Маxизер взяла — 3/8 часть шариков.
Сколько шариков осталось в ящике?
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Ответов: 1
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