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Giúp mình làm các câu hỏi này nha: (càng nhiều càng tốt!)1. Tiffany and Ryan deposit some amount in a joint bank account such that total balance remains 500. If  amount deposited by Tiffany and Ryan are plotted as a linear graph on xy plane, find the area between this graph and the coordinate axis.2.A group of workers is paving a road. If they pave 200m of the road a day, they will need 3 more days. to finish the work. If they pave 240m of the road a day, they will finish the work...
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Giúp mình làm các câu hỏi này nha: (càng nhiều càng tốt!)

1. Tiffany and Ryan deposit some amount in a joint bank account such that total balance remains 500. If  amount deposited by Tiffany and Ryan are plotted as a linear graph on xy plane, find the area between this graph and the coordinate axis.

2.A group of workers is paving a road. If they pave 200m of the road a day, they will need 3 more days. to finish the work. If they pave 240m of the road a day, they will finish the work 2 days in advance. How long is the road, in meter?

3. Mrs. Darlie has a silver ring, a golden ring and a diamond ring. She put them on her left hand. Each ring can be on any of the five fingers. When there are two or three rings on the same finger, if the order in which they are put is different, that couunt as a different way. How many different ways for Lea to put these rings?

4. Let P(x) be a polynomial with degree 3 such that P(1)=3, P(2)=3, P(3)=7, P(4)=21. Find the value of P(5).

1

4. Call that polynomial P (x) = ax3 + bx2 + cx + d

We have P(1)=a+b+c+d=3   (1)

P(2)=8a+4b+2c+d=3   (2)

P(3)=27a+9b+3c+d  =7       (3) 

P(4)=64a+16b+4c+d     =21    (4)

From (1) and  (2) =>  7a+3b+c=0

From (1) and  (4)  => 63a+15b+3c=18

=> 12b+6c=-18  => 2b+c=-3

From (1) and  (3) =>26a+8b+2c=4=> 13a+4b+c=2

=> 13a+2b=5

It is possible

Giúp mình làm các câu hỏi này nha: (càng nhiều càng tốt!)1. Tiffany and Ryan deposit some amount in a joint bank account such that total balance remains 500. If  amount deposited by Tiffany and Ryan are plotted as a linear graph on xy plane, find the area between this graph and the coordinate axis.2.A group of workers is paving a road. If they pave 200m of the road a day, they will need 3 more days. to finish the work. If they pave 240m of the road a day, they will finish the work...
Đọc tiếp

Giúp mình làm các câu hỏi này nha: (càng nhiều càng tốt!)

1. Tiffany and Ryan deposit some amount in a joint bank account such that total balance remains 500. If  amount deposited by Tiffany and Ryan are plotted as a linear graph on xy plane, find the area between this graph and the coordinate axis.

2.A group of workers is paving a road. If they pave 200m of the road a day, they will need 3 more days. to finish the work. If they pave 240m of the road a day, they will finish the work 2 days in advance. How long is the road, in meter?

3. Mrs. Darlie has a silver ring, a golden ring and a diamond ring. She put them on her left hand. Each ring can be on any of the five fingers. When there are two or three rings on the same finger, if the order in which they are put is different, that couunt as a different way. How many different ways for Lea to put these rings?

4. Let P(x) be a polynomial with degree 3 such that P(1)=3, P(2)=3, P(3)=7, P(4)=21. Find the value of P(5).

2
1. Tiffany và Ryan gửi một số tiền vào tài khoản ngân hàng chung sao cho tổng số dư còn lại 500. Nếu số tiền được gửi bởi Tiffany và Ryan được vẽ dưới dạng biểu đồ tuyến tính trên mặt phẳng xy, hãy tìm khu vực giữa biểu đồ này và trục tọa độ. 2.Một nhóm công nhân đang mở đường. Nếu họ mở 200m đường mỗi ngày, họ sẽ cần thêm 3 ngày nữa. để hoàn thành công việc. Nếu họ mở 240m đường mỗi ngày, họ sẽ hoàn thành công việc trước 2 ngày. Bao lâu là đường, tính bằng mét? 3. Bà Darlie có một chiếc nhẫn bạc, một chiếc nhẫn vàng và một chiếc nhẫn kim cương. Cô đặt chúng lên tay trái. Mỗi chiếc nhẫn có thể nằm trên bất kỳ ngón tay nào trong năm ngón tay. Khi có hai hoặc ba chiếc nhẫn trên cùng một ngón tay, nếu thứ tự chúng được đặt khác nhau, thì đó là một cách khác nhau. Có bao nhiêu cách khác nhau để Lea đặt những chiếc nhẫn này? 4. Đặt P (x) là một đa thức có bậc 3 sao cho P (1) = 3, P (2) = 3, P (3) = 7, P (4) = 21. Tìm giá trị của P (5).
21 tháng 6 2019

#)Góp ý :

Mấy câu như thế này thì bạn nên lên Discuss with Math You - MathYou hỏi nhé ^^

Vì web này chuyên cho học sinh giải toán tiếng anh nên lên đây hỏi sẽ tiện hơn

Rewrite the sentences using have something done.1. The money was deposited in his bank account by the company.... He had the money deposited in his bank account. .........................2. Sarah’s new fridge will be delivered tomorrow....................................................................................................................3. Tim’s car was serviced last...
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Rewrite the sentences using have something done.1. The money was deposited in his bank account by the company.... He had the money deposited in his bank account. .........................2. Sarah’s new fridge will be delivered tomorrow....................................................................................................................3. Tim’s car was serviced last week....................................................................................................................4. Mrs. Scott’s cat was examined by the vet yesterday....................................................................................................................5. Paul’s house will be painted next weekend....................................................................................................................6. Mr. Brown’s book has just been published....................................................................................................................7. Becky’s hair is done every week....................................................................................................................8. Edward’s dinner was cooked by his mother yesterday....................................................................................................................

2
4 tháng 2 2021

1. He had the money deposited in his bank account by the company

2. Sarad will have her new fridge delivered tomorrow

3. Tim had his car serviced last week

4. Mrs.Scott had her cat examined by the vat

5. Paul will have his house painted next weekend

6. Mr.Brown has had his book published

7. Becky has his hair done every week

8. Edward had  his dinner cooked by his mother

3 tháng 2 2021

Rewrite the sentences using have something done.

1. The money was deposited in his bank account by the company

...............the company deposited The money in his bank account  ............

2. Sarah’s new fridge will be delivered tomorrow

..................They will deliver Sarah’s new fridge tomorrow..........................

3. Tim’s car was serviced last week

.............They serviced Tim’s car last week...............................

4. Mrs. Scott’s cat was examined by the vet yesterday

................the vet examined  Mrs. Scott’s cat   yesterday.....................

5. Paul’s house will be painted next weekend.

.................They will paint Paul’s house  next weekend............................

6. Mr. Brown’s book has just been published

....................They have just published Mr. Brown’s book..................

7. Becky’s hair is done every week

............they do Becky’s hair every week ......................

8. Edward’s dinner was cooked by his mother yesterday

..........Edward's mother cooked his dinner yesterday........

VOCABULARY ( 16 points) Read and choose ( 10 points) Amazing Boring relaxed bored annoyed interested Surprised Confused proud worried 1. Ryan was _____________ because some students laughed at Olivia. 2. Ryan and Luke thought it was ________________ when the man gave Olivia her necklace. 3. Luke talked about his neighbour. The teacher was _____________ and wanted to know more. 4. I am never ________________ when we talk about social problems because I like to know what people think. 5. I...
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VOCABULARY ( 16 points) Read and choose ( 10 points) Amazing Boring relaxed bored annoyed interested Surprised Confused proud worried 1. Ryan was _____________ because some students laughed at Olivia. 2. Ryan and Luke thought it was ________________ when the man gave Olivia her necklace. 3. Luke talked about his neighbour. The teacher was _____________ and wanted to know more. 4. I am never ________________ when we talk about social problems because I like to know what people think. 5. I usually do my homework when I get home. Then I feel ____________________ and I can do what I want 6. The game was _______________ so I stopped playing it 7. I was late and Dad was very ________________ 8. Olivia was ___________________ when pizza arrived 9. Dan was at the football match, but Jake wasn’t there. They usually go together. I am _________________ 10.Luke was ___________________ of his idea to order Olivia a special pizza

ai giup minh baai nay voi a dang cần gấp

0
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42.         The main cause of tooth decay is acid, which is produced by bacteria in the mouth. The acid removes minerals from tooth enamel, allowing tooth decay to begin; the saliva in your mouth encourages remineralization and neutralizes the acid. The rate at which bacteria in the mouth produce acid depends on the amount of plaque on the teeth,...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 35 to 42.

        The main cause of tooth decay is acid, which is produced by bacteria in the mouth. The acid removes minerals from tooth enamel, allowing tooth decay to begin; the saliva in your mouth encourages remineralization and neutralizes the acid. The rate at which bacteria in the mouth produce acid depends on the amount of plaque on the teeth, the composition of the microbial flora, and whether the bacteria of the plaque have been “primed” by frequent exposure to sugar. To keep your teeth healthy, a regular dental hygiene program should be followed.

        Removing plaque with a toothbrush and dental floss temporarily reduces the numbers of bacteria in the mouth and thus reduces tooth decay. It also makes the surfaces of the teeth more accessible, enabling saliva to neutralize acid and remineralize lesions. If fluoride is present in drinking water when teeth are forming, some fluoride is incorporated into the enamel of the teeth, making them more resistant to attack by acid. Fluoride toothpaste seems to act in another way, by promoting the remineralization of early carious lesions.

                   In addition to a regular dental hygiene program, a good way to keep your teeth healthy is to reduce your intake of sweet food. The least cavity-causing way to eat sweets is to have them with meals and not between. The number of times you eat sweets rather than the total amount determines how much harmful acid the bacteria in your saliva produce. But the amount of sweets influences the quality of your saliva. Avoid, if you can, sticky sweets that stay in your mouth a long time. Also try to brush and floss your teeth after eating sugary foods. Even rinsing your mouth with water is effective. Whenever possible, eat foods with fiber, such as raw carrot sticks, apples, celery sticks, etc., that scrape off plaque, acting as a toothbrush. Cavities can be greatly reduced if these rules are followed when eating sweets.

The author of the passage states that the amount of acid produced by the bacteria in your saliva increases _________.

A. with the amount of sweets you eat

B. with the number of times you eat sweets

C. if you eat sweets with your meals 

D. if you eat sticky sweets

1
13 tháng 6 2017

Chọn đáp án B

Tác gi của bài đọc nói rằng lượng axit do vi khun tiết ra trong nước bọt tăng lên _________.

A. cùng với lượng đồ ngọt mà bạn ăn

B. cùng với số lần bạn ăn đồ ngọt

C. nếu bạn ăn đồ ngọt cùng với các bữa ăn

D. nếu bạn ăn đồ ngọt dẻo

Dẫn chứng: The number of times you eat sweets rather than the total amount determines how much harmful acid the bacteria in your saliva produce. (Số lần bạn ăn đồ ngọt quyết định có bao nhiêu axit gây hại do vi khuẩn tiết ra trong nước bọt của bạn.)

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.         The cause of tooth decay is acid, which is produced by bacteria in the mouth. The acid removes minerals from tooth enamel, allowing tooth decay to begin; the saliva in your mouth encourages remineralization and neutralizes the acid. The rate at which bacteria in the mouth produce acid depends on the amount of plaque on the teeth, the composition of...
Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

        The cause of tooth decay is acid, which is produced by bacteria in the mouth. The acid removes minerals from tooth enamel, allowing tooth decay to begin; the saliva in your mouth encourages remineralization and neutralizes the acid. The rate at which bacteria in the mouth produce acid depends on the amount of plaque on the teeth, the composition of the microbial flora, and whether the bacteria of the plaque have been "primed" by frequent exposure to sugar. To keep your teeth healthy, a regular dental hygiene program should be followed.
        Removing plaque with a toothbrush and dental floss temporarily reduces the numbers of bacteria in the mouth and thus reduces tooth decay. It also makes the surfaces of the teeth more accessible, enabling saliva to neutralize acid and remineralize lesions. If fluoride is present in drinking water when teeth are forming, some fluoride is incorporated into the enamel of the teeth, making them more resistant to attack by acid. Fluoride toothpaste seems to act in another way, by promoting the remineralization of early carious lesions.
In addition to a regular dental hygiene program, a good way to keep your teeth healthy is to reduce your intake of sweet food. The least cavity-causing way to eat sweets is to have them with meals and not between. The number of times you eat sweets rather than the total amount determines how much harmful acid the bacteria in your saliva produce. But the amount of sweets influences the quality of your saliva. Avoid, if you can, sticky sweets that stay in your mouth a long time. Also try to brush and floss your teeth after eating sugary foods. Even rinsing your mouth with water is effective. Whenever possible, eat foods with fiber, such as raw carrot sticks, apples, celery sticks, etc., that scrape off plaque, acting as a toothbrush. Cavities can be greatly reduced if these rules are followed when eating sweets.

The author of the passage states that the amount of acid produced by the bacteria in your saliva increases __________.

A. with the amount of sweets you eat

B. with the number of times you eat sweets 

C. if you eat sweets with your meals   

D. if you eat sticky sweet

1
30 tháng 8 2018

Đáp án B

Tác giả của đoạn văn nói rằng lượng axit do vi khuẩn tạo ra trong nước bọt tăng __________.
A. với lượng đồ ngọt mà bạn ăn
B. với số lần bạn ăn đồ ngọt
C. nếu bạn ăn kẹo cùng với các bữa ăn
D. nếu bạn ăn đồ ngọt dẻo
Thông tin ở câu: “The number of times you eat sweets rather than the total amount determines how much harmful acid the bacteria in your saliva produce.” (Số lần bạn ăn đồ ngọt thay vì tổng số lượng bạn ăn quyết định có bao nhiêu axit gây hại do vi khuẩn trong nước bọt của bạn tạo ra)

25 tháng 9 2016

gọi số tiền ông nam gửi vào ngân hàng là a (a>0)

TBR: a + 2%a = 16728

a + 0,02a=16728

1,02a=16728

a=16400

vậy số tiền ông nam gửi vào ngân hàng là 16400