OLM cung cấp gói bải giảng điện tử PPT cho giáo viên đầu năm học

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DD
Đinh Đức Tài
13 tháng 8 2015 - olm

1. Solve for x: - 1/2 × ∣ 2x + 6 ∣ + 2 = 0
A. x = 5 or x = 1
B. x = 5
C. x = -5 or x = -1
D. x = -1
E. x = -6

2. A patient was given medicine for pain. The graph represents the level of pain as a function of time after taking the medicine. Which type of function best models the pain level as a function of time?
A. linear
B. quadratic
C. logarithmic
D. exponential
E. None of them
#Toán lớp 9
4
DD
Đinh Đức Tài
13 tháng 8 2015

Gợi ý vàng 

1. Giải quyết cho x: - 1/2 × | 2x + 6 | + 2 = 0
A. x = 5 hoặc x = 1
B. x = 5
C. x = -5 hoặc x = -1
D. x = -1
E. x = -6

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TT
Trần Thị Loan
13 tháng 8 2015

1) -1/2. |2x + 6| + 2 = 0 

<=> 1/2. |2x+6| = 2 <=> |2x+6| = 4 <=> 2x+6 = 4 or  2x + 6 = -4

+) 2x + 6 = 4 <=> x = -1

+) 2x+6 = -4 <=> x = -5

Answer: C

2/ E. 

 

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TT
Trần Thị Anh Thư
28 tháng 2 2018 - olm
Câu 1 The function mm is defined on the real numbers by m(k) = \dfrac{k+2}{k+8}m(k)= k+8 k+2 ​ . What is the value of 10\times m(2)10×m(2)? Answer: Câu 2 The function ff is defined on the real numbers by f(x)= ax-3f(x)=ax−3. What is the value of a if f(3)=9f(3)=9? Answer: Câu 3 The function ff is defined on the real numbers by f(x)= 2x+a-3f(x)=2x+a−3. What is the value of a if f(-5)=11f(−5)=11? Answer: Câu 4 The function ff is defined on the real numbers by f(x) = 2 +...
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Câu 1 The function mm is defined on the real numbers by m(k) = \dfrac{k+2}{k+8}m(k)= k+8 k+2 ​ . What is the value of 10\times m(2)10×m(2)? Answer: Câu 2 The function ff is defined on the real numbers by f(x)= ax-3f(x)=ax−3. What is the value of a if f(3)=9f(3)=9? Answer: Câu 3 The function ff is defined on the real numbers by f(x)= 2x+a-3f(x)=2x+a−3. What is the value of a if f(-5)=11f(−5)=11? Answer: Câu 4 The function ff is defined on the real numbers by f(x) = 2 + x-x^2f(x)=2+x−x 2 . What is the value of f(-3)f(−3)? Answer: Câu 5 Given a real number aa and a function ff is defined on the real numbers by f(x)=-6\times|3x|-4f(x)=−6×∣3x∣−4. Compare: f(a)f(a) f(-a)f(−a) Câu 6 There are ordered pairs (x;y)(x;y) where xx and yy are integers such that \dfrac{5}{x}+\dfrac{y}{4}=\dfrac{1}{8} x 5 ​ + 4 y ​ = 8 1 ​ Câu 7 Given a negative number kk and a function ff is defined on the real numbers by f(x)=\dfrac{6}{13}xf(x)= 13 6 ​ x. Compare: f(k)f(k) f(-k)f(−k) Câu 8 Given a positive number kk and a function ff is defined on the real numbers by f(x)=\dfrac{-3}{4}x+4f(x)= 4 −3 ​ x+4. Compare: f(k)f(k) f(-k)f(−k). Câu 9 A=(1+2+3+\ldots+90) \times(12 \times34-6 \times 68):(\dfrac{1}{3}+\dfrac{1}{4}+\dfrac{1}{5}+\dfrac{1}{6})=A=(1+2+3+…+90)×(12×34−6×68):( 3 1 ​ + 4 1 ​ + 5 1 ​ + 6 1 ​ )= Câu 10 Given that \dfrac{2x+y+z+t}{x}=\dfrac{x+2y+z+t}{y}=\dfrac{x+y+2z+t}{z}=\dfrac{x+y+z+2t}{t} x 2x+y+z+t ​ = y x+2y+z+t ​ = z x+y+2z+t ​ = t x+y+z+2t ​ . The negative value of \dfrac{x+y}{z+t}+\dfrac{y+z}{t+x}+\dfrac{z+t}{x+y}+\dfrac{t+x}{y+z} z+t x+y ​ + t+x y+z ​ + x+y z+t ​ + y+z t+x ​ is
#Toán lớp 7
2
TT
Trần Thị Anh Thư
28 tháng 2 2018

nhanh đi nhé

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NQ
Nguyễn Qúy Cảnh
1 tháng 11 2019

KHO QUÁ ĐI

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LQ
Lê Quỳnh Anh
25 tháng 10 2018
Read the following passage and mark the letter A, B, C, or D to indicate the correct word for each of the blanks from (1) to (10). PROACTIVE JOB HUNTING Once upon a time, people left school or university, joined a company and stayed with it until they retired. The concept of a job for life is now long (1) x , and nowadays many employees find it hard o stay loyal to their companies for even a relatively short period of time. According to a recent survey, this is particularly (2) x in London,...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D to indicate the correct word for each of the blanks from (1) to (10).

PROACTIVE JOB HUNTING

Once upon a time, people left school or university, joined a company and stayed with it until they retired. The concept of a job for life is now long (1) x , and nowadays many employees find it hard o stay loyal to their companies for even a relatively short period of time. According to a recent survey, this is particularly (2) x in London, where more than half of those asked said that they constantly (3) x one eye on other job opportunities, (4) x they are fairly happy in their existing job. A high number of London workers say that they are always on the (5) x , although they are content and motivated in their current position.

Job seekers find that the internet (6) x them with a quick and easy way to find out what's available, and 53 percent said that they had applied for a job or registered with an employment agency inthe past 12 months. This proactive (7) x means that people can look for a perfect job match with the (8) x of effort. But while this is good for job hunters, the growing lack of company loyalty could (9) x up being a big problem for employers .Perhaps surprisingly, the (10) x factors attracting job seekers was not more money, but challenging and interesting work.Question 5

A. search

B. pursuit

C. lookout

D. watch
#Mẫu giáo
1
DH
Dương Hoàn Anh
25 tháng 10 2018

Đáp án là C. be on the look-out: coi chừng.

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LQ
Lê Quỳnh Anh
23 tháng 7 2018
Read the following passage and mark the letter A, B, C, or D to indicate the correct word for each of the blanks from (1) to (10). PROACTIVE JOB HUNTING Once upon a time, people left school or university, joined a company and stayed with it until they retired. The concept of a job for life is now long (1) x , and nowadays many employees find it hard o stay loyal to their companies for even a relatively short period of time. According to a recent survey, this is particularly (2) x in London,...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D to indicate the correct word for each of the blanks from (1) to (10).

PROACTIVE JOB HUNTING

Once upon a time, people left school or university, joined a company and stayed with it until they retired. The concept of a job for life is now long (1) x , and nowadays many employees find it hard o stay loyal to their companies for even a relatively short period of time. According to a recent survey, this is particularly (2) x in London, where more than half of those asked said that they constantly (3) x one eye on other job opportunities, (4) x they are fairly happy in their existing job. A high number of London workers say that they are always on the (5) x , although they are content and motivated in their current position.

Job seekers find that the internet (6) x them with a quick and easy way to find out what's available, and 53 percent said that they had applied for a job or registered with an employment agency inthe past 12 months. This proactive (7) x means that people can look for a perfect job match with the (8) x of effort. But while this is good for job hunters, the growing lack of company loyalty could (9) x up being a big problem for employers .Perhaps surprisingly, the (10) x factors attracting job seekers was not more money, but challenging and interesting work.Question 6

A. delivers

B. serves

C. fulfils

D. provides
#Mẫu giáo
1
DH
Dương Hoàn Anh
23 tháng 7 2018

Đáp án là D. provide someone with something: cung cấp cho ai cái gì

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LQ
Lê Quỳnh Anh
21 tháng 10 2018
Read the following passage and mark the letter A, B, C, or D to indicate the correct word for each of the blanks from (1) to (10). PROACTIVE JOB HUNTING Once upon a time, people left school or university, joined a company and stayed with it until they retired. The concept of a job for life is now long (1) x , and nowadays many employees find it hard o stay loyal to their companies for even a relatively short period of time. According to a recent survey, this is particularly (2) x in London,...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D to indicate the correct word for each of the blanks from (1) to (10).

PROACTIVE JOB HUNTING

Once upon a time, people left school or university, joined a company and stayed with it until they retired. The concept of a job for life is now long (1) x , and nowadays many employees find it hard o stay loyal to their companies for even a relatively short period of time. According to a recent survey, this is particularly (2) x in London, where more than half of those asked said that they constantly (3) x one eye on other job opportunities, (4) x they are fairly happy in their existing job. A high number of London workers say that they are always on the (5) x , although they are content and motivated in their current position.

Job seekers find that the internet (6) x them with a quick and easy way to find out what's available, and 53 percent said that they had applied for a job or registered with an employment agency inthe past 12 months. This proactive (7) x means that people can look for a perfect job match with the (8) x of effort. But while this is good for job hunters, the growing lack of company loyalty could (9) x up being a big problem for employers .Perhaps surprisingly, the (10) x factors attracting job seekers was not more money, but challenging and interesting work.Question 10

A. biggest

B. highest

C. widest

D. largest
#Mẫu giáo
1
DH
Dương Hoàn Anh
21 tháng 10 2018

Đáp án là A. the biggest factors: những yếu tố lớn nhất

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LQ
Lê Quỳnh Anh
29 tháng 1 2019
Read the following passage and mark the letter A, B, C, or D to indicate the correct word for each of the blanks from (1) to (10). PROACTIVE JOB HUNTING Once upon a time, people left school or university, joined a company and stayed with it until they retired. The concept of a job for life is now long (1) x , and nowadays many employees find it hard o stay loyal to their companies for even a relatively short period of time. According to a recent survey, this is particularly (2) x in London,...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D to indicate the correct word for each of the blanks from (1) to (10).

PROACTIVE JOB HUNTING

Once upon a time, people left school or university, joined a company and stayed with it until they retired. The concept of a job for life is now long (1) x , and nowadays many employees find it hard o stay loyal to their companies for even a relatively short period of time. According to a recent survey, this is particularly (2) x in London, where more than half of those asked said that they constantly (3) x one eye on other job opportunities, (4) x they are fairly happy in their existing job. A high number of London workers say that they are always on the (5) x , although they are content and motivated in their current position.

Job seekers find that the internet (6) x them with a quick and easy way to find out what's available, and 53 percent said that they had applied for a job or registered with an employment agency inthe past 12 months. This proactive (7) x means that people can look for a perfect job match with the (8) x of effort. But while this is good for job hunters, the growing lack of company loyalty could (9) x up being a big problem for employers .Perhaps surprisingly, the (10) x factors attracting job seekers was not more money, but challenging and interesting work.Question 4

A. just as

B. even if

C. as well

D. so that
#Mẫu giáo
1
DH
Dương Hoàn Anh
29 tháng 1 2019

Đáp án là B. even if = whether or not: mang tính giả dụ

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LQ
Lê Quỳnh Anh
15 tháng 11 2017
Read the following passage and mark the letter A, B, C, or D to indicate the correct word for each of the blanks from (1) to (10). PROACTIVE JOB HUNTING Once upon a time, people left school or university, joined a company and stayed with it until they retired. The concept of a job for life is now long (1) x , and nowadays many employees find it hard o stay loyal to their companies for even a relatively short period of time. According to a recent survey, this is particularly (2) x in London,...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D to indicate the correct word for each of the blanks from (1) to (10).

PROACTIVE JOB HUNTING

Once upon a time, people left school or university, joined a company and stayed with it until they retired. The concept of a job for life is now long (1) x , and nowadays many employees find it hard o stay loyal to their companies for even a relatively short period of time. According to a recent survey, this is particularly (2) x in London, where more than half of those asked said that they constantly (3) x one eye on other job opportunities, (4) x they are fairly happy in their existing job. A high number of London workers say that they are always on the (5) x , although they are content and motivated in their current position.

Job seekers find that the internet (6) x them with a quick and easy way to find out what's available, and 53 percent said that they had applied for a job or registered with an employment agency inthe past 12 months. This proactive (7) x means that people can look for a perfect job match with the (8) x of effort. But while this is good for job hunters, the growing lack of company loyalty could (9) x up being a big problem for employers .Perhaps surprisingly, the (10) x factors attracting job seekers was not more money, but challenging and interesting work.Question1

A. finished

B. done

C. over

D. gone
#Mẫu giáo
1
DH
Dương Hoàn Anh
15 tháng 11 2017

Đáp án là D. long gone: được sử dụng một thời gian dài trước đây

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LQ
Lê Quỳnh Anh
18 tháng 10 2018
Read the following passage and mark the letter A, B, C, or D to indicate the correct word for each of the blanks from (1) to (10). PROACTIVE JOB HUNTING Once upon a time, people left school or university, joined a company and stayed with it until they retired. The concept of a job for life is now long (1) x , and nowadays many employees find it hard o stay loyal to their companies for even a relatively short period of time. According to a recent survey, this is particularly (2) x in London,...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D to indicate the correct word for each of the blanks from (1) to (10).

PROACTIVE JOB HUNTING

Once upon a time, people left school or university, joined a company and stayed with it until they retired. The concept of a job for life is now long (1) x , and nowadays many employees find it hard o stay loyal to their companies for even a relatively short period of time. According to a recent survey, this is particularly (2) x in London, where more than half of those asked said that they constantly (3) x one eye on other job opportunities, (4) x they are fairly happy in their existing job. A high number of London workers say that they are always on the (5) x , although they are content and motivated in their current position.

Job seekers find that the internet (6) x them with a quick and easy way to find out what's available, and 53 percent said that they had applied for a job or registered with an employment agency inthe past 12 months. This proactive (7) x means that people can look for a perfect job match with the (8) x of effort. But while this is good for job hunters, the growing lack of company loyalty could (9) x up being a big problem for employers .Perhaps surprisingly, the (10) x factors attracting job seekers was not more money, but challenging and interesting work.Question 7

A. manner

B.custom

C. approach

D. style
#Mẫu giáo
1
DH
Dương Hoàn Anh
18 tháng 10 2018

Đáp án là C. approach: sự tiếp cận

Nghĩa các từ còn lại: manner: cách thức; custom: phong tục; style: phong cách

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LQ
Lê Quỳnh Anh
26 tháng 9 2017
Read the following passage and mark the letter A, B, C, or D to indicate the correct word for each of the blanks from (1) to (10). PROACTIVE JOB HUNTING Once upon a time, people left school or university, joined a company and stayed with it until they retired. The concept of a job for life is now long (1) x , and nowadays many employees find it hard o stay loyal to their companies for even a relatively short period of time. According to a recent survey, this is particularly (2) x in London,...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D to indicate the correct word for each of the blanks from (1) to (10).

PROACTIVE JOB HUNTING

Once upon a time, people left school or university, joined a company and stayed with it until they retired. The concept of a job for life is now long (1) x , and nowadays many employees find it hard o stay loyal to their companies for even a relatively short period of time. According to a recent survey, this is particularly (2) x in London, where more than half of those asked said that they constantly (3) x one eye on other job opportunities, (4) x they are fairly happy in their existing job. A high number of London workers say that they are always on the (5) x , although they are content and motivated in their current position.

Job seekers find that the internet (6) x them with a quick and easy way to find out what's available, and 53 percent said that they had applied for a job or registered with an employment agency inthe past 12 months. This proactive (7) x means that people can look for a perfect job match with the (8) x of effort. But while this is good for job hunters, the growing lack of company loyalty could (9) x up being a big problem for employers .Perhaps surprisingly, the (10) x factors attracting job seekers was not more money, but challenging and interesting work.Question 3

A. put

B. keep

C. hold

D. place
#Mẫu giáo
1
DH
Dương Hoàn Anh
26 tháng 9 2017

Đáp án là B. keep an eye on: để mắt vào, theo dõi

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LQ
Lê Quỳnh Anh
25 tháng 7 2018
Read the following passage and mark the letter A, B, C, or D to indicate the correct word for each of the blanks from (1) to (10).PROACTIVE JOB HUNTINGOnce upon a time, people left school or university, joined a company and stayed with it until they retired. The concept of a job for life is now long (1) x , and nowadays many employees find it hard o stay loyal to their companies for even a relatively short period of time. According to a recent survey, this is particularly (2) x in London, where...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D to indicate the correct word for each of the blanks from (1) to (10).

PROACTIVE JOB HUNTING

Once upon a time, people left school or university, joined a company and stayed with it until they retired. The concept of a job for life is now long (1) x , and nowadays many employees find it hard o stay loyal to their companies for even a relatively short period of time. According to a recent survey, this is particularly (2) x in London, where more than half of those asked said that they constantly (3) x one eye on other job opportunities, (4) x they are fairly happy in their existing job. A high number of London workers say that they are always on the (5) x , although they are content and motivated in their current position.

Job seekers find that the internet (6) x them with a quick and easy way to find out what's available, and 53 percent said that they had applied for a job or registered with an employment agency inthe past 12 months. This proactive (7) x means that people can look for a perfect job match with the (8) x of effort. But while this is good for job hunters, the growing lack of company loyalty could (9) x up being a big problem for employers .Perhaps surprisingly, the (10) x factors attracting job seekers was not more money, but challenging and interesting work.Question2

A. true

B. real

C. right

D. actual
#Mẫu giáo
1
DH
Dương Hoàn Anh
25 tháng 7 2018

Đáp án là A. true: thật. (đề cập đến lời nói, sự thật nào đó.)

Các từ khác không chọn được: real : thật ( khi nói 1 vật gì đó là thật , không phải giả ); right: đúng; actual: thực tế

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