Предмет: Алгебра, автор: Аноним

Обчисліть:

1.
\sqrt{1 \frac{21}{100 } } - 5 \sqrt{0.04}
2. (–3√2)² =

3. √0,1 • √4,9 =

4.
\frac{ \sqrt{54} }{ \sqrt{1.5} }

​

Ответы

Автор ответа: Slava491
3

1.

√1 21/100-5√0,04=

=√121/100-5•0,2=

=11/10-1=1/10

2.

(-3√2)²=9•2=18

3.

√0,1•√4,9=√(0,1•4,9)=√0,49=0,7

4.

√54/√1,5=√(54:1,5)=√36=6

Предыдущий вопрос
Следующий вопрос
Интересные вопросы
Предмет: Биология, автор: ellanotepad
Чим відрізняється права від лівої лопатки
1 год назад
Предмет: Українська мова, автор: yulivashek
Пж помогите задание на
фото
1 год назад
Предмет: Алгебра, автор: ebanayapochtashluxi1
Спростіть вираз: а) 4с(2-с) - (c + 4)(3 + с)
1 год назад
Предмет: Английский язык, автор: atamdanil48
1.Выберите правильный ответ и запишите (10 marks)

1.There is a/an fireplace in the living room.
2.There are any/some cushions on the sofa.
3.She (catch/catches) the bus every morning.
4.Mrs McCarthy (work/works) in a computer factory.
5. We is/are having a party.
6. Is/Are she listening to music?
7. He is not having/doesn't have a shower right now.
8. My brother (spend/spent) €120 on CDs last weekend.
9. You must/can't have any pets in this house. It’s not allowed.
10. There isn't/aren’t coffee in the jar.

2.Прочитайте текст и определите истинность высказываний после него (true/false). Ответ выберите из вариантов (true/false)(6 marks)
Sochi
The city of Sochi is a popular Russian holiday resort on the Black Sea coast. It is about 1,500 miles south of Moscow. The city is famous for its warm weather, beautiful landscapes, golden beaches and health spas.
Every summer, more than 1.5 million visitors from Russia and abroad spend their holidays there. People travel to Sochi by both air and sea. It has got an international airport with flights to most major Russian cities, as well as Europe. Its port has a sea link with Turkey, Greece, Georgia and Ukraine. Most tourists visit the city in the summer, but the winter season attracts skiers to Krasnaya Polyana. As well as skiing, visitors can enjoy hunting, fishing and mountain climbing. There are also lots of festivals in Sochi and every year in June there is the international film festival. In the evening, Sochi is full of colourful street cafes and restaurants where you can eat delicious food at good prices.
Sochi is a city that has got something to offer everyone. If you want to spend time on the ski slopes or at the beach, Sochi is the ideal choice for you.

a) true b) false
1) Sochi is not far from the central part of Russia.
2) Only people from Russia visit Sochi.
3) There are flights from the big cities to Sochi.
4) In Sochi summer is the worst season.
5) In winter the tourists can ski in Krasnaya Polyana.
6) The tourists can find cheap food in Sochi.

***3.Выберите подходящие варианты для заполнения пропусков в высказываниях трёх персонажей о погоде. (15 marks)
Al Wheeler from Canada: ”We have long, cold winters and short, hot summers. We have a holiday house near a lake, so in summer I go 1) ______ a lot and I play baseball, but in winter I often play ice hockey and go ice-skating. My favourite season is 2) ______, or fall, as we say in North America because I love the colours of the trees — red, gold, orange, yellow and brown.”
Manuela da Silva from Portugal: ”People think it’s always warm and sunny in Portugal, but January and February are often 3) ______, wet and grey. I don’t like winter. I usually meet friends in restaurants and bars and we chat. Sometimes we go to a Brazilian bar. I love Brazilian music. But then suddenly it’s summer, and at weekends we drive to the 4) ______, sunbathe and go swimming. I love summer.”
Toshi Suzuki from Japan: “I work for “Pentax cameras”, in the export department. I don’t have a lot of free time, but I have one special hobby — taking photographs! I like taking photos of the first 5) ______, of course, in spring.

1) a) dancing b) swimming c) riding d) climbing
2) a) spring b) summer c) autumn d) winter
3) a) cold b) hot c) red d) nice
4) a) forest b) field c) city d) beach
5) a) animals b) flowers c) clouds d) snowmen
7 лет назад
Предмет: Математика, автор: Аноним
Выберите верные утверждения:
Выберите несколько из 5 вариантов ответа:
1) Угол 120° - острый.
2) Если угол меньше 90°, то его называют острым углом.
3) Если угол больше 90°, но меньше 180°, то его называют тупым углом.
4) Угол 30° - тупой.
5) Угол 90° - прямой.
 
7 лет назад