A/   $$\begin{gathered} 5=\frac{25}{4}>\frac{3}{4} \\ \Rightarrow 5> \frac{3}{4} \end{gathered}$$

B/     $$\begin{gathered} 2=\frac{6}{3}> \frac{1}{3} \\ \Rightarrow 2> \frac{1}{3} \end{gathered}$$

P:             AABB           $\times$             aabb 

$G_P$ :           AB                                ab

$F_1$    :          AaBb    (100% thân cao hoa đỏ)

$F_1\times F_1$:      AaBb       $\times$AaBb

$G_{F1 :}$  AB, Ab, aB,ab        AB, Ab,aB, ab

$F_2$ :

TIN MÌNH ĐI MÌNH LÀM ĐÚNG Á

1. I think in the future,  people will take up more outdoor activities.

2. Mỹ best friend doesn't like mountain climbing because he is afraid of heights.

3. Mỹ sister enjoys cooking and making new dishes on her own.

google dịch hân hạnh đồng hành cùng chương trình

LÀ MÌNH THÍCH CẬU ĐÓ

$(\sqrt{6}-\sqrt{3})$.($\sqrt{6}+\sqrt{3})$=${\left(\sqrt{6}\right)}^2-{\left(\sqrt{3}\right)}^2$=6-3=3

NÈ HE

-a/ xét tam giác ABC vuông tại A có:

AB=$\sqrt{B{C}^2-A{C}^2}=\sqrt{5^2-4^2}=3$

SinB=$\frac{đ}{h}=\frac{AC}{BC}=\frac{4}{5}$

$\Rightarrow$Góc B xấp xỉ 53, 13 độ

-Ta có góc C=90 -góc B =90-53,13= 36,87 độ

b/SinC=$\frac{đ}{h}=\frac{AB}{BC}\Rightarrow BC=\frac{AB}{SinC}=\frac{6}{0,64}$=9,38

Vậy AC=$\sqrt{B{C}^2-A{B}^2}=\sqrt{9,{38}^2-6^2}=7,2$

-Góc B=90-góc C=90-40=50

NÈ BẠN=))

$$\begin{gathered} \iff {\left(7x\right)}^3-3.{\left(7x\right)}^2.11+3.7x.{11}^2-{11}^3=2^5.5^2+200 \\ \iff 343.x^3-1617x^2+2541.x-1331-1000=0 \\ \iff 343x^3-1617x^2+2541x-2331=0 \\ \iff 343x^3-1029x^2-588x^2+1764x+777x-2331=0 \\ \iff 343x(x^2-3)-588x(x-3)+777(x-3)=0 \\ \iff (x-3)\left(343x\right(x+3)-588x+777))=0 \\ \iff (x-3\left)\right(343x^2+1029x-588x+777)=0 \\ \iff (x-3\left)\right(343x^2+441x+777)=0 \\ \iff x-3=0 \\ \iff x=3 (vì 343x^2+441x+777 luôn lớn hoặc bằng 0) \end{gathered}$$

nè

1.   Hoa was born in Doc So craft village. She knows the process of making pottery. (BECAUSE)

=Because Hoa was born in Doc So craft village, she knows the process of making pottery.

2.   The library was bombed. Many important historical documents were destroyed. (WHEN)

=Many important historical documents were destroyed when the library was bombed.

3.   She entered the room. She knew there was something wrong. (AS SOON AS)

=She entered the room as soon as she knew there was something wrong.

4.   We decided to take rooms in Longwood House. We knew we could not afford the rent. (EVEN THOUGH)

=Even though we knew we could not afford the rent, we decided to take rooms in ...

5.   My mom instructed me through 15 stages of making a conical hat. I could make one for me. (SO THAT)

=My mom instructed me through 15 stages of making a conical hat so that I could make one for me. 

Annyeong hashimnikka안

VII.      Choose the best answer a, b, c or d to complete the sentence.

1.   I almost missed my flight      b. since      there was a long queue in the duty-free shop.

 2.   I want to be well-groomed    c. so that     other people think nice things about me.

  3.           a. Although          she is young, she is very independent.

4.     d. Before      I met the Gills, I had been gardening for nearly ten years.                   

5.         c. After     he had finished his studies, he went to America.

 6.   You’ll never guess what happened b.as soon as I left my room.

7.   c. Even though   they’re expensive, they last forever and never go out of style.

8.   She went back to live with her mother        d. because          she did not earn enough money to live in her own house.

 9.   They were driving to Dallas     c. before       they caught an accident.

 10.       d. While     she was asleep, thieves broke in and stole her handbag.

        VIII. Join each pair of sentences, using the word or phrase in brackets.

1.   Hoa was born in Doc So craft village. She knows the process of making pottery. (BECAUSE)

=Because Hoa was born in Doc So craft village, she knows the process of making pottery.

2.   The library was bombed. Many important historical documents were destroyed. (WHEN)

=Many important historical documents were destroyed when the library was bombed.

3.   She entered the room. She knew there was something wrong. (AS SOON AS)

=She entered the room as soon as she knew there was something wrong.

4.   We decided to take rooms in Longwood House. We knew we could not afford the rent. (EVEN THOUGH)

=Even though we knew we could not afford the rent, we decided to take rooms in ...

5.   My mom instructed me through 15 stages of making a conical hat. I could make one for me. (SO THAT)

=My mom instructed me through 15 stages of making a conical hat so that I could make one for me. (SO THAT)

6.   You want to knit a hat for your friend. You should watch tutorials on YouTube. (BEFORE)

= Before you want to knit a hat for your friend, you should watch tutorials on youtube.

7.   I was not enjoying the party. I wanted to leave early. (AS)

=I wanted to leave early as I was not enjoying the party.

8.   I was cleaning out my cupboards. I found these photos. (WHILE)

=I found these photos while I was cleaning out my cupboards.

9.   I went to Malaysia last year. I wanted to experience a whole new world. (IN ORDER TO)

=I went to Malaysia last year in order to experience a whole new world.

10. I attended a knitting workshop last Sunday. I don’t know how to knit a scarf. (ALTHOUGH)

=Although I don't know how to knit a scarf, I attended a knitting workshop last Sunday.

(HOPE IT CAN HELP YOU =)))

VII.      Choose the best answer a, b, c or d to complete the sentence.

1.   I almost missed my flight      b. since      there was a long queue in the duty-free shop.

 2.   I want to be well-groomed    c. so that     other people think nice things about me.

  3.           a. Although          she is young, she is very independent.

4.     d. Before      I met the Gills, I had been gardening for nearly ten years.                   

5.         c. After     he had finished his studies, he went to America.

 6.   You’ll never guess what happened b.as soon as I left my room.

7.   c. Even though   they’re expensive, they last forever and never go out of style.

8.   She went back to live with her mother        d. because          she did not earn enough money to live in her own house.

 9.   They were driving to Dallas     c. before       they caught an accident.

 10.       d. While     she was asleep, thieves broke in and stole her handbag.

        VIII. Join each pair of sentences, using the word or phrase in brackets.

1.   Hoa was born in Doc So craft village. She knows the process of making pottery. (BECAUSE)

=Because Hoa was born in Doc So craft village, she knows the process of making pottery.

2.   The library was bombed. Many important historical documents were destroyed. (WHEN)

=Many important historical documents were destroyed when the library was bombed.

3.   She entered the room. She knew there was something wrong. (AS SOON AS)

=She entered the room as soon as she knew there was something wrong.

4.   We decided to take rooms in Longwood House. We knew we could not afford the rent. (EVEN THOUGH)

=Even though we knew we could not afford the rent, we decided to take rooms in ...

5.   My mom instructed me through 15 stages of making a conical hat. I could make one for me. (SO THAT)

=My mom instructed me through 15 stages of making a conical hat so that I could make one for me. (SO THAT)

6.   You want to knit a hat for your friend. You should watch tutorials on YouTube. (BEFORE)

= Before you want to knit a hat for your friend, you should watch tutorials on youtube.

7.   I was not enjoying the party. I wanted to leave early. (AS)

=I wanted to leave early as I was not enjoying the party.

8.   I was cleaning out my cupboards. I found these photos. (WHILE)

=I found these photos while I was cleaning out my cupboards.

9.   I went to Malaysia last year. I wanted to experience a whole new world. (IN ORDER TO)

=I went to Malaysia last year in order to experience a whole new world.

10. I attended a knitting workshop last Sunday. I don’t know how to knit a scarf. (ALTHOUGH)

=Although I don't know how to knit a scarf, I attended a knitting workshop last sunday.

- Xét $∆MNP \perp tại M có:$

$M{N}^2+M{P}^2=N{P}^2$$\Rightarrow NP=\sqrt{M{N}^2+M{P}^2}=\sqrt{{30}^2+{40}^2}=50$

-Ta có : $M{N}^2=NI.NP\Rightarrow NI=\frac{M{N}^2}{NP}=\frac{{30}^2}{50}=18$

- Xét $∆$MNI vuông tại I có: $$\begin{gathered} M{I}^2=M{N}^2-N{I}^2 \\ \Rightarrow MI=\sqrt{M{N}^2-N{I}^2}=\sqrt{{30}^2-{18}^2}=24 \end{gathered}$$

a/ A=199.201=(200-1)(200+1)=${200}^2-1^2$

     B=200.200=${200}^2$

Mà ${200}^2-1 < {200}^2\Rightarrow A<B$

b/   C= 35.53$-$18

   D=53.34 + 35 = 53.(35$-$1)  +35  =53.35 $-$53.1 +35=53.35 $-$53+35=53.35 $-$18

Ta có:C=35.53 -18  và D= 35.53 -18

Vậy C = D

NÈ NHA=)))

       ${(x-5)}^2+2x(x-5)$ =0

$\iff$(x-5)(x-5+2x) =0

$\iff$(x-5)(3x-5) =0

$\Rightarrow$x-5=0 hoặc 3x-5=0

$\iff$x=5 hoặc  x=$\frac{5}{3}$

NÈ =))

A. Ca ngợi tinh thần yêu nước nồng nàn trong ăn sâu trong xương máu của con người việt nam ta, lúc bình thường thì âm thầm, lặng lẽ chăm chỉ làm việc cũng như gióng ba năm chẳng nói, chẳng cười. Cho đến khi có đất nước gặp cơn nguy, có giặc đến xâm lấn thì họ rất dũng cảm, tiên phong ra trận đánh giặc cứu nước.

B. Nghệ thuật:  Xây dựng thành công hình tượng người anh hùng Thánh Gióng với những chi tiết kì ảo hấp dẫn, li kì.

Our hosts at the party last Sunday night treated us very kindly.

The telephone rang while I was taking my shower this morning.

At the beginning of this semester, this class seems quite easy.

The teacher interrupted us just as we seemed quite easy.

1. Do you like playing any musical instruments in your free time?

2. I usually play badminton with my dad in the park.

3. I don't want to go to the circus (rạp xiếc).

4. I am shopping at the mall now.

5. We could go either to the concert or to the cinema.

(NÈ EM )

1. She asked where her umbrella was.

2. Martin asked us how old we were.

3. He asked me if/whether he had to do it.

4. The mother asked her daughter where she had been.

(Dạ cái bài này thuộc dạng reported speech "câu tường thuật" ạ=)))

30.D    31.B      32.A     33.A    34.D     35.C        36.A          37.B        38.B      39.memorable         40.C

NÈ BẠN=))

-Vì R1 nối tiếp R2 nên ta có $R_{tđ}=R_1+R_2=10+20=30$

-Ta có $I_m=$$I_1=I_2=$$\frac{U_m}{R_{tđ}}=$$\frac{12}{30}=$0,4(A)

-Ta có : I=$\frac{U}{R}\Rightarrow U=I.R$

$U_1=0,4.10=4\left(V\right)$

$U_2=0,4.20=8\left(V\right)$

BÀI GIẢI ĐÂY NHA, VỚI LẠI TỤI MÌNH BẰNG TUỔI MÌNH CŨNG HỌC LỚP 9=))