Предмет: Алгебра, автор: work66

за 5 кг апельсинів і 6 кг лимонів заплатили 15 грн. скіки коштує 1 кг апельсинів і 1 кг лимонів якщо 4 кг апельсинів дороще на 3 кг лимонів.

Ответы

Автор ответа: MAMATKULOV

Пусть килограмм апельсин стоит х, а килограмм лимонов у, тогда из условия задачи можно записать

5x+6y=150
4x=3y+3
Решая систему любым известным способом (я домножил второе уравнение на -2 и сложил с первым), получаем
5x+8x=156 ⇒ x=12 грн; 3y=48-3 ⇒ y=15грн

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Задайте вопрос начиная со слова в скобках .
6. My father is a cosmonaut . ( Is )
7. Those hares are in the bag . (What )
№ 3.
1. She is a teacher . ( What )
2. These bears are big . ( Are )
3. This elephant is in the bag . (Where )
4. His uncle is from America . (Where )
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Вставьте подходящую форму глагола to be ,упражнения с использованием 20 % незнакомой лексики
№ 1.
1. This tiger … big .
2. How … your uncle ? He … fine .
3. Where … he from ? He … from America .
4. We … teachers .
5. This cat … in the bag .
6. I … a dentist .
7. Where … you from ? I … from Italy .
№ 2 .
1. This apple … yellow.
2. Where … they from ? They …
from Great Britain .
3. We … workers .
4. I … a painter .
5. The dog … in the house .
6. He … from Norway .
8. This eagle … brown .
9. How … you ? I … fine .
10. Those flowers … red .
7. His uncle … a pilot .
8. How … his mother ? She … fine .
9. These foxes … nice .
10. How old … you ? I … seven .
№ 3.
1. This dog … big .
2. These monkeys … funny .
3. She … a doctor .
4. Where … he from ? He … from Africa .
5. Those rabbits … in the box .
6. Her mother … an actriss.
7. These snakes … yellow .
8. Their families … from Germany .
9. How old … you ? I … nine .
10. His aunt … fine .
№ 4 .
1. Where … she from ? She … from Brazil
.
2. Her niece … a doctor .
3. How … you ? I … fine .
4. I … a hunter .
5. What colour … those flowers ? They …
violet .
6. He … a teacher .
7. That dog … little .
8. Those monkeys … funny .
9. The toys … on the shelf .
10. How old … he ? He … eight .
Вставь have или has.
№1
1. He ____________ got an uncle?
2. I ____________got many balls.
3. __________ they got many toys?
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№2
1. He __________ got an uncle.
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5. She ___________not got a sister.
6. I _____________not got one doll.
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№3 №4
1. They ___________got a daughter.
2. His aunt ___________got a dog.
3. She _____________ not dot a brother.
4. I ___________ got two cats.
5. _______________her uncle got a son?
6. He ______________not got a daughter.
7. ___________ they got a puppy.
1. Her aunt ________________got a daughter.
2. She _____________ not got a niece.
3. _______________they got a toy crocodile?
4. I _____________got four ducks.
5. He ____________not got an aunt.
6. __________his sister got a nephew?
7. Her uncle __________ got a daughter.
Вставьте необходимую форму глаголов to be \ to have
№1
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2. She ___________ got a grandfather.
3. How ____________he? He ____________ fine.
4. The brown cows _____________ near the box.
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______________ from Great Britain.
6. I ____________ got five giraffes.
7. Those elephants ______________big.
8. His uncle _____________ a pilot.
9. ____________his brother many toys?
10. They ___________not got a cat.
№2
1. This kitten _____________ little.
2. He ____________ got a brother.
3. Where ___________they from? They
____________ from Russia.
4. Those tigers ____________ big.
5. Her uncle __________ got a son.
6. How ____________his father? He ________
fine.
7. My sister _____________ a worker.
8. _______________ you got two toy hares?
9. They __________ pilots.
10. ___________ his aunt from
America?
№3
1. That bird _________ nice.
2. How ____________ she? She ______________
fine.
3. I _____________got six crocodile.
4. He ___________ a worker.
5. He ___________ got a grandmother.
№4
1. Where ____________ they from? They
____________ from America.
2. She _____________ got an aunt.
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______________ fine.
4. That kitten ______________ funny.
5. Their friends _____________ teachers.
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