Turned to ni The Dursleys had all they wanted, but
As he dro
they also had a secret. The secret was that cat aga
about the Potters. Mrs. Potter was Mrs. garden wall
Dursley's sister, but Mrs. Dursley did not "Shoo!",
like her sister. The Dursleys knew that cat did not
the Potters had a baby son, but they did angrily. "W
not want to see him.
Dursley tho
The story started on Tuesday when Mr. Mrs. Dur
and Mrs. Dursley woke up. They did not Mr. Dursle
see a large owl behind their window. At Dudley we
half past eight, Mr. Dursley left the house living room
and got into his car. On the corner of the He heard a
street he saw something interesting - a lot of owls
cat was reading a map. For a second, Mr. Durs
Mr. Dursley did not understand what it Owls flying
was. He closed and opened his eyes in cloaks
and tried not to think about the cat.
about the
As he was driving he saw a lot of about the
strange people. They were wearing about ther
green cloaks! Mr. Dursley did not like the A thin c
people who got dressed funny clothes.
near the c
Mr. Dursley always sat with his back Dumbledo
to the window in his office on the ninth Gonagall.
floor. So he did not see the owls flying Dumble
at daylight, but the people down in the
was not
street were looking at them.
answered
Mr. Dursley made several important Harry Pot
telephone calls and decided to walk to Dumble
the bakery. In the street he again met live with
some people in cloaks and it made Voldemor
him angry. They were talking about the to kill Ha
Potters and their son Harry. When Mr. Then H
Dursley heard those words, he stopped. He had a
He was scared. He looked back at those Harry Po
people. Then he walked up to his office, Dursleys
closed the door and told his secretary and the le
not to take the telephone.
said: "Ha
LO​

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Популярные вопросы:
Ответ:
selenagulya2002
06.04.2022 18:42
       s                s
|*|
Обозначим весь путь 2s, х км в час скорость Семена, у км в час - скорость машины.
Тогда на путь от дома до школы Семен тратит t часов, которые равны сумме времени, затраченного на путь на машине и пешком.

(s/x)+(s/y)=t
 
Если Семён пойдет  пешком всю дорогу, то опоздает на пол часа.
Т. е на путь 2s cо скоростью х км в час, затратит время
t+(30/60).

2s/x=t+(30/60)⇒  s/x=(t/2)+(1/4)

Тогда время, затраченное на проезд половины пути на машине:
(s/y)=t-(s/v)=t-(t/2)-(1/4)=(t/2)-(1/4).

Находим время, затраченное на проезд (2/3) пути на машине, т.е. (2/3) от 2s делим на скорость у км в час:

(4s/3y)=(4/3)·(t/2)-(4/3)·(1/4)= (2t/3)-(1/3)

Находим время затраченное на прохождение (1/3) пути пешком машине, т.е. (1/3) от 2s делим на скорость х км в час.

2s/3x=(2/3)·(s/x)=(2/3)·((t/2)+(1/4))=(t/3)+(1/6)
Складываем:
(2t/3)-(1/3)+(t/3)+(1/6)=t-(1/6)

Сравниваем    t    и        t-(1/6), получаем ответ.
О т в е т. За 10 минут до звонка придет в школу Семён.
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Ответ:
Kolibri98
31.12.2022 00:42
Запишем, какие числа удовлетворяют условию задачи:
11, 13, 15, ..., 99 - двузначные натуральные нечетные
Найдем их общее количество: последовательность является арифметической прогрессией, где:

чисел
а) 

Нечетное число: 
Числа, удовлетворяющие условию: 11, 13, ..., 31
Их количество: 

Вероятность: 
б) 

Условию будут удовлетворять числа: 91, 93, 95, 97, 99 (5 шт.)
Вероятность: 
в) 
Если х=9, то у=9
Если х=8, то у=9
Получаем числа: 99, 89 (2 шт.)
Вероятность: 
г) 
Если х=1, то у=1; 3
Если х=2, то у=1
Если х=3, то у=1
Числа: 11, 13, 21, 31 (4 шт.)
Вероятность: 
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