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a: UM=AU=2,5/2=1,25cm

VA=VE=AE/2=1,25cm

b: UV=1,25+1,25=2,5cm

19 tháng 1 2022

giải chi tiết ra nhé bạn

39) Ta có: \(\sqrt{49-5\sqrt{96}}-\sqrt{49+5\sqrt{96}}\)

\(=\sqrt{49-20\sqrt{6}}-\sqrt{49+20\sqrt{6}}\)

\(=5-2\sqrt{6}-5-2\sqrt{6}\)

\(=-4\sqrt{6}\)

40) Ta có: \(\sqrt{35+12\sqrt{6}}-\sqrt{35-12\sqrt{6}}\)

\(=3\sqrt{3}+2\sqrt{2}-3\sqrt{3}+2\sqrt{2}\)

\(=4\sqrt{2}\)

41) Ta có: \(\sqrt{13+2\sqrt{42}}+\sqrt{13-2\sqrt{42}}\)

\(=\sqrt{7}+\sqrt{6}+\sqrt{7}-\sqrt{6}\)

\(=2\sqrt{7}\)

giúp em với ạ .em cảm ơn ạExercise 1: Rewrite the sentences, use the verbs in present passive form:1.     People use milk for making butter and cheese.➔Milk is used for making butter and cheese (by people)2.     The milkman brings bottles of milk to houses.➔Bottles of milk are brought to houses by the milkman.3.     Careless driving causes many accidents.➔ ………………………………………………………………………………………………………………..4.     Weeds cover the river bank. (bờ sông)➔...
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giúp em với ạ .em cảm ơn ạ

Exercise 1: Rewrite the sentences, use the verbs in present passive form:

1.     People use milk for making butter and cheese.

➔Milk is used for making butter and cheese (by people)

2.     The milkman brings bottles of milk to houses.

➔Bottles of milk are brought to houses by the milkman.

3.     Careless driving causes many accidents.

➔ ………………………………………………………………………………………………………………..

4.     Weeds cover the river bank. (bờ sông)

➔ ………………………………………………………………………………………………………………..

5.     People speak English all over the world.

➔ ………………………………………………………………………………………………………………..

6.     They don't use this house very often.

➔ ………………………………………………………………………………………………………………..

7.     Do they teach French in this school?

➔ ………………………………………………………………………………………………………………..

8.     They make a lot of beautiful toys from recycled plastic.

➔ ………………………………………………………………………………………………………………..

9.     The workers clean the streets every day.

➔ ………………………………………………………………………………………………………………..

10.                        Do they usually hold the concerts at the university?

➔ ………………………………………………………………………………………………………………..

 

Exercise 2: Rewrite these sentences, using the verbs in passive form with

                                    "will/ can/ should/ must + be + past participle/ V3."

1.     Some body will clean the room later.

➔ the room will be cleaned later.

2.     You mustn't open this parcel until Christmas Day.

➔ …………………………………………………………………………………………………………..…..

3.     They can't make tea with cold water.

➔ ………………………………………………………………………………………………………..……..

4.     The students will hold a meeting before the Teacher's Day.

➔ ………………………………………………………………………………………………………..……..

5.     People can recycle tires to make pipes or floor coverings.

➔ ………………………………………………………………………………………………………..……..

6.     They should send applications before December.

➔ ………………………………………………………………………………………………………..……..

7.     The manage must sign the contract today.

➔ ………………………………………………………………………………………………………..……..

8.     They will build the new bridge by the end of the year.

➔ ………………………………………………………………………………………………………..……..

9.     We should use cloth bags instead of plastic bags.

➔ ………………………………………………………………………………………………………..……..

10.                        We can use the garbage to make fertilizer.

➔ ………………………………………………………………………………………………………..……..

 

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19 tháng 1 2022

\(a+a.\frac{3}{2}+a:\frac{2}{7}=252\)

=>\(a+a.\frac{3}{2}+a.\frac{7}{2}=252\)

=>\(a.\left(1+\frac{3}{2}+\frac{7}{2}\right)=252\)

=>\(a.\left(1+5\right)=252\)

=>\(a.6=252\)

=>\(a=42\)

Vậy \(a=42\)

A+Ax3/2+A:2/7=252

A+Ax3/2+Ax7/2=252

Ax(1+3/2+7/2)=252

Ax6=252

A=42

HT

29 tháng 10 2021

16.Milk is the most nourishing food.
—> Milk is  more nourishing than any other food
17.Bombay is the richest city in India.
—> Bombay is richer than any other cities in India
18.Iron is the most useful metal.
—> Iron is more useful than any other metals
19.Shakespeare is the greatest English poet.
—> Shakespeare is greater than any English poet
20.Munnar is the prettiest hill station in India.
—> Munnar is prettier than any other hill station in India

18 tháng 11 2021

1. The dustbins are emptied every Thursday .

2. Milk is delivered at about six o'clock .

3. He was found dead in his flat early this morning .

26 tháng 11 2021

Câu bj động hả

26 tháng 11 2021

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