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Phương pháp:

- Tìm số gà bán trong ngày thứ ba == số gà bán trong ngày thứ hai ×2×2.

- Tìm tổng số gà bán trong 33 ngày.

- Số gà trung bình bán mỗi ngày == tổng số gà bán trong 33 ngày :3:3. 

Cách giải:

Ngày thứ ba trại đó bán được số gà là :

                  1252×2=25041252×2=2504 (con)

Cả 3 ngày trại đó bán được số gà là :

                3756+1252+2504=75123756+1252+2504=7512 (con)

 Trung bình mỗi ngày trại đo bán được số gà là :

                  7512:3=25047512:3=2504 (con)

                                      Đáp số : 25042504 con.

V. MatchingA                                                                                     B1. Although I have many friends,                                   a. However, I admire her courage.2. I didn’t wake up late                                                    b. Nevertheless, he is good at Literature3. I don’t really like Mary.                                           ...
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V. Matching

A                                                                                     B
1. Although I have many friends,                                   a. However, I admire her courage.
2. I didn’t wake up late                                                    b. Nevertheless, he is good at Literature
3. I don’t really like Mary.                                                 c. Living in it, however, is very comfortable.
4. Their project was finally successful                             d. he didn’t skip the class.
5. Tom is not good at science subjects.                           e. although my alarm clock didn’t go off.
6. In spite of his headache,                                              f. I feel lonely sometimes
7. My apartment is quite small.                                        g. despite all the obstacles
8. I rarely go travelling                                                     h. although many friends want to travel with me.

1
7 tháng 3 2020

MATCH:

1-F            5-B

2-E            6-D

3-A            7-C

4-G           8-H

Nếu đúng bạn k cho mình nhé :D

7 tháng 3 2020

a) vì x và y là hai đại lượng TLT nên y=ax

mà x=5 thì y=10

suy ra 10=5a suy ra a=2

Vậy y=2x ( hệ số tỉ lệ a=2)

b) y=3x 

khi x=-3suy ra y=-9

Khi x=-2 suy ra y=-6

...

7 tháng 3 2020

Đề có sai ko bạn sao lại c-d ?

7 tháng 3 2020

Sửa đề : Cần chứng minh \(4\left(a-b\right)\left(b-c\right)=\left(c-a\right)^2\)

Đặt :\(\frac{a}{2017}=\frac{b}{2018}=\frac{c}{2019}=k\)

\(\Rightarrow\hept{\begin{cases}a=2017k\\b=2018k\\c=2019k\end{cases}}\)

Khi đó :

\(4\left(a-b\right)\left(b-c\right)=4\left(2017k-2018k\right)\left(208k-2019k\right)\)

\(=4\cdot\left(-k\right)\cdot\left(-k\right)=4k^2\)

\(\left(c-a\right)^2=\left(2019k-2017k\right)^2=\left(2k\right)^2=4k^2\)

Do đó : \(4\left(a-b\right)\left(b-c\right)=\left(c-a\right)^2\) (đpcm)

V. Read the following passage and choose the best answers to each of the questions.Every state has its own laws for driving and getting a driver's license. To learn these laws, people have to read the Rules of the Road book for their state. They can get the book free at a driver's license facility in their state.In Illinois, people between the ages of 15 and 18 have to take a driver's education course in school before they can get a permit to practice driving. People over 18 don't have to take...
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V. Read the following passage and choose the best answers to each of the questions.

Every state has its own laws for driving and getting a driver's license. To learn these laws, people have to read the Rules of the Road book for their state. They can get the book free at a driver's license facility in their state.

In Illinois, people between the ages of 15 and 18 have to take a driver's education course in school before they can get a permit to practice driving. People over 18 don't have to take this course in order to get a permit. When people get a learner's permit, they have to take a test. They have to know the traffic signs and laws in order to pass this test. Then they have to get their vision tested. When they get theirlearner's permits, they can practice driving, but a licensed driver has to be in the car with

them at all times. A learner's permit is good for one year.

When the learner is ready to get a license, he or she has to take a driving test. During the test, new drivers have to back out of an alley, park uphill anddownhill, make right- and left-turns, obey all traffic laws, and do whatever else the examiner may ask them to do to show that they know how to drive.

1/ What is the writer trying to do in the text?

a.         Complain about traffic accidents.

b.         Describe what to do to get a driver's license.

c.         Persuade drivers to drive carefully.

d.         Advise drivers how to drive.

2/ Why would somebody read the text?

a.         To find out about traffic laws.

b.         To learn how to drive a car.

c.         To find out about getting a driver's license.

d.         To learn some details about the rules of the roads .

3/ In order to get a driver's license, most important of all, the learner has to .................................

a.         read the Rules of the Road book for his/her state

b.         get his/her vision tested

c.         know all the traffic laws

d.         pass a driving test

4/ The word "free" most nearly means ..............................

            a. without limit            b. without having to pay

            c. without shopping     d. at any time

5/ The word "alley" most nearly means ......................

            a. narrow passage        b. garage          c. garden          d. sidewalk

1
10 tháng 3 2020

V. Read the following passage and choose the best answers to each of the questions.

Every state has its own laws for driving and getting a driver's license. To learn these laws, people have to read the Rules of the Road book for their state. They can get the book free at a driver's license facility in their state.

In Illinois, people between the ages of 15 and 18 have to take a driver's education course in school before they can get a permit to prace driving. People over 18 don't have to take this course in order to get a permit. When people get a learner's permit, they have to take a test. They have to know the traffic signs and laws in order to pass this test. Then they have to get their vision tested. When they get theirlearner's permits, they can prace driving, but a licensed driver has to be in the car with

them at all times. A learner's permit is good for one year.

When the learner is ready to get a license, he or she has to take a driving test. During the test, new drivers have to back out of an alley, park uphill anddownhill, make right- and left-turns, obey all traffic laws, and do whatever else the examiner may ask them to do to show that they know how to drive.

1/ What is the writer trying to do in the text?

a.         Complain about traffic accidents.

b.         Describe what to do to get a driver's license.

c.         Persuade drivers to drive carefully.

d.         Advise drivers how to drive.

2/ Why would somebody read the text?

a.         To find out about traffic laws.

b.         To learn how to drive a car.

c.         To find out about getting a driver's license.

d.         To learn some details about the rules of the roads .

3/ In order to get a driver's license, most important of all, the learner has to .................................

a.         read the Rules of the Road book for his/her state

b.         get his/her vision tested

c.         know all the traffic laws

d.         pass a driving test

4/ The word "free" most nearly means ..............................

            a. without limit            b. without having to pay

            c. without shopping     d. at any time

5/ The word "alley" most nearly means ......................

            a. narrow passage        b. garage          c. garden          d. sidewalk

7 tháng 3 2020

A B C D E H

Xét tam giác ADB và tam giác AEC

có AB=AC (GT)

góc ADB=góc AEC=900

góc BAC chung

suy ra tam giác ADB =tam giác AEC (cạnh huyền-góc nhọn)

suy ra AE = AD (hai cạnh tương ứng)

b) Xét tam giác AHE và tam giác AHD

có AH chung

góc AEH=góc ADH = 900

AE=AD (CMT)

suy ra  tam giác AHE = tam giác AHD (cạnh huyền-cạnh góc vuông)

suy ra góc HAE=góc HAD

suy ra AH là tia phân giác của góc BAC

c) góc BAC = 400 suy ta góc ABC=góc ACB = 700

Xét tam giác ADB vuông tại D suy ra góc A + góc ABD = 900 suy ra góc ABD = 200

mà góc ABH + góc HBC = góc ABC

nên góc HBC = 700 - 200 = 500

CMTT góc HCB = 500

xét tam giác BHC có góc HBC+góc HCB+góc BHC = 1800 suy ra góc BHC=800

\(\text{Ta có: 8!=40320}\)

\(\Rightarrow\text{8!:11 hay 40320:11=3665, dư 5}\)

Vậy......

Học tốt!

7 tháng 3 2020

           Giải

Đổi : 8! = 40320

=> 8! : 11 = 40320 : 11 = 3665 (dư 5)

Vậy số dư khi chia 8! : 11 là 5

7 tháng 3 2020

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