Предмет: Математика, автор: janivleff1

Сумма двух чисел равна 499. Одно из чисел оканчивается цифрой 4 . Если эту цифру зачеркнуть, то получится второе число. Найдите эти числа.

Ответы

Автор ответа: nataxa9912
0

Пусть первое число X, а второе y, тогда

x+y=499

10x+4=y

Подставим значение Y со второго уравнения в первое

x+(10x+4)=499

11x=495

x=45,

тогда

y=10x+4=10*45+4=454

То есть имеем числа 45 и 454

Автор ответа: Аноним
0
ничего непонятно
Автор ответа: janivleff1
0
это 9 класс наверное
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Writing Comprehension

Test 1
РАСКРОЙТЕ СКОБКИ, УПОТРЕБЛЯЯ ГЛАГОЛЫ В SIMPLE PASSIVE.
1.The letters (to sort) into the different towns.2.Many interesting games always (to play) at our PT lessons.3.The postbox (to empty) yesterday.4.This work (to do) tomorrow.5. Stamps (to postmark) at the post office.6.These trees (to plant) last autumn.

Test 2(цифра-буква)
Fill in a, an or the where it is necessary.
а) a
b) an
c) –
d) the

(1) ... United Kingdom of (2) ... Great Britain and (3) ... Northern Ireland is the official name of the state which is situated on (4) ... British Isles. The UK is (5)... island state. The main islands are separated by (6) ... Irish Sea. The UK is separated from the Continent by (7) ... English Channel and (8) ... Strait of Dover. It is washed by (9) ... Atlantic Ocean in the north and (10) ... North Sea in the east. The capital of the UK is (11) ... London. (12) ... English is the official language.
There are (13) ... lot of rivers in (14) ... Great Britain. The most important river is (15) ... Thames. (16) ... Ben Nevis in (17) ... Scotland is the highest mountain. There is (18) ... saying that Britain doesn’t have (19) ... climate, it only has (20) ... weather.

Test 3

Put the verbs in brackets into the Past Simple or Past Continuous form.
1)It was lucky we (sit) under that tree when it
(break) and fell down.
2)How fast he (drive) when
he (have) an accident?
3)She (read) in the garden when it
(start) to rain.
4)The family (eat) dinner and talking.
5)They (talk) about her when she
(walk) into the room.
6)I (still/sleep) when my parents
(leave) for work this morning.

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