Предмет: Алгебра, автор: kborisenko721

7+х\8-х - 5\х+4
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Автор ответа: Аноним
1

Ответ:

Объяснение:

(7+x)/(8-x) -5/(x+4)=((7+x)(x+4)-5(8-x))/((8-x)(x+4))=(11x+x²+28-40+5x)/(4x-x²+32)=(x²+16x-12)/(-x²+4x+32)=(-x²-16x+12)/(x²-4x-32)

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Control work 9
Variant 1

2. Choose (Выберите) the correct item.
1. There isn’t many/ any cream left.
2. There are some/ any apples in a fruit bowl.
3. You need only a little/ a lot of flour for this dessert.
4. At a shop are many/ a lot of goods to choose from.
5. There are not many/ little peanuts.

3. Complete the sentences using (Поставьте глаголы из () в) the Present Perfect or the Present Perfect
Continuous.
1. I ... (bring) such nice souvenirs from England.
2. I’m angry. My sister ... (wear) my blouse again.
3. Many people ... (not like) eating boiled onion since their childhood.

4. A customer ... (choose) a dress for half an hour.
5. A shop assistant looks tired. She ... (consult) customers.

4. Put the missing jobs. (Вставьте названия профессий.) There is one extra.
cashier, manager, security guard, cleaner, shop assistant
1. A ... is in charge of a shop working.
2. A ... serves customers.
3. A ... deals with money.
4. A ... can catch people who steal goods from shops.

6. Fill in the missing postpositions (дополните фразовый глагол ‘take’): away, off, out, back.
1. Don’t try on a new piece of clothes before you take ... your old one.
2. Would you like to eat in or take your order ...?
3. A customer can take ... an unsuitable ware in its initial quality to a shop for 14 days.
4. Friends usually take one another ... to cafes to celebrate their birthdays.

8. Match the containers and the products. (Соотнесите продукт и контейнер)
1) a bottle of
2) a can of
3) a jar of
4) a tin
5) a packet

a) Sprite
b) maize;
c) water;
d) butter;
e) marmaladе

9. Put the conversation in order. (Расставьте фразы в правильном порядке, запишите буквы в нужном
порядке.)
F. What’s that? - 0.
A. Oh, no, it doesn’t fit, but I like the photo on it.
B. What a smart T-shirt. That’s so nice of you!
C. Don’t worry, you can take it back to the shop to get the right size.
D. It’s a gift for you. What do you think?
E. Try it on, please, and see if it fits.