Every 2 jackets cost $30 and every 4 coats cost $40.Find the total cost of 8 such jackets and 16 such coats?
1 table and 3 same chairs cost 765 dollars. 2 such tables and 4 such chairs cost 1370 dollars. Find the total cost of 8 chairs.
Answer: The total cost is …………dollars.
Gọi giá tiền của 1 cái bàn là x(đô la), giá tiền của 1 cái ghế là y(đô la)
1 cái bàn và 3 cái ghế giống nhau có giá 765 đô la nên x+3y=765(1)
2 cái bàn và 4 cái ghế như vậy có giá 1370 đô la nên
2x+4y=1370
=>x+2y=685(2)
Từ (1),(2) ta có hệ phương trình:
\(\left\{{}\begin{matrix}x+3y=765\\x+2y=685\end{matrix}\right.\)
=>\(\left\{{}\begin{matrix}x+3y-x-2y=765-685\\x+2y=685\end{matrix}\right.\)
=>\(\left\{{}\begin{matrix}y=80\\x=685-2y=685-160=525\end{matrix}\right.\left(nhận\right)\)
=>Giá tiền của 8 cái ghế là 8*80=640 đô la
I. Choose the word (a, b, c or d) that best fits each of the blank spaces.
In the Victorian period, men still wore frock coats (16) _____, for less formal occasions, changed (17) _____ short lounging jackets worn with narrow trousers and a bow tie. (18) _____ women, full dresses came back (19) _____ fashion, held out from the body by a crinoline (= a frame worn under the skirt). These were (20) _____ replaced (21) _____ the bustle, a padded roll wrapped around the hips. Towards (22) _____ end of the (23) _____ women began wearing narrower skirts and two-piece (24) _____ with corsets. They wore caps (25) _____ and bonnets outside.
- Victorian (adj): (thuộc) thời đại Nữ hoàng Victoria (1837-1901)
16. a. in spite of b. despite c. however d. but
17. a. into b. for c. at d. to
18. a. For b. With c. As d. According to
19. a. to b. into c. off d. for
20. a. later b. lately c. latest d. late
21. a. for b. with c. by d. to
22. a. a b. an c. the d. Æ
23. a. decade b. century c. period d. empire
24. a. cloths b. costumes c. customers d. shirts
25. a. indoor b. inside c. indoors d. outdoor
Choose the word (a, b, c or d) that best fits each of the blank spaces.
In the Victorian period, men still wore frock coats (16) _____, for less formal occasions, changed (17) _____ short lounging jackets worn with narrow trousers and a bow tie. (18) _____ women, full dresses came back (19) _____ fashion, held out from the body by a crinoline (= a frame worn under the skirt). These were (20) _____ replaced (21) _____ the bustle, a padded roll wrapped around the hips. Towards (22) _____ end of the (23) _____ women began wearing narrower skirts and two-piece (24) _____ with corsets. They wore caps (25) _____ and bonnets outside.
- Victorian (adj): (thuộc) thời đại Nữ hoàng Victoria (1837-1901)
16. a. in spite of b. despite c. however d. but
17. a. into b. for c. at d. to
18. a. For b. With c. As d. According to
19. a. to b. into c. off d. for
20. a. later b. lately c. latest d. late
21. a. for b. with c. by d. to
22. a. a b. an c. the d. Æ
23. a. decade b. century c. period d. empire
24. a. cloths b. costumes c. customers d. shirts
25. a. indoor b. inside c. indoors d. outdoor
3 caps and 3 umbrellas cost $57. 7 caps and 6 umbrellas cost $122. Find the cost of 1 cap.
8 caps
11 umbrellas
. Self-cooling clothes may seem 1_____ the stuff of science fiction, but one Japanese company 2_____ created such products by 3_____ fans to shirts and jackets. Shirts and jackets 4_____ by Kuchou-fuku keep the weather comfortable 5_____ in sweltering heat. And they’re also environmentally friendly as they use just one-fiftieth 6_____ the energy of small air-conditioner units which cool entire rooms. The company has sold about 5,500 of the garments 7_____ they went on sale three years ago, mostly to factory workers. But 8_____ cool the clothes are, they seem unlikely 9_____ very popular. The fans fill the shirts with air, making the wearers look a bit fat. ‘My daughter won’t wear them because the shape is no good,’ admitted Hiroshi Ichigaya, 10_____ works for the company that produces the clothes.
1 A similar B like C as D to
2 A will have B has C have D having
3 A add B to add C adding D added
4 A make B making C makes D made
5 A although B even C however D despite
6 A of B to C than D for
7 A when B while C for D since
8 A whatever B however C how D although
9 A to become B become C becoming D became
10 A which B that C who D whose
A bat and a ball cost one dollar and ten cents in total. The bat costs a dollar more than the ball. How much does the ball cost?
1,Our performance is p____y impressive.
2,His …towards me is very strange
A.behave B.behavitor C.behaved D.behaving
3,Lan always talks too much _____ nothing.
4,How much is that altogether also mean
A.How much is total?
B. How much is the total?
C.What total is cost?
D What is the total cost?
5, The cafeteria is _____ so they don’t have to wait long.
6,Daily products….. cacilum and……. your teeth and bones healthy
A.consist/keep B.contain/keep C.has/make D.have/treat
7. Cindy had a s___d reason for acting as she did.
8. Is Sara scared of _____g the dentist?
9. Look ___ for symptoms of depression.
10.In Nha Trang, tourists can take ____ in some outdoor activities such as scuba diving.
2,His …towards me is very strange
A.behave
B.behavior
C.behaved
D.behaving
10.In Nha Trang, tourists can take PART in some outdoor activities such as scuba diving.
sắp xếp:1,a/send/how/cost/to/does/oversea/it/much/abroad/letter? 2,a/letter/how/is/much/USA/the/to? 3,total/the goods/mother/what/cost/your/is/of/buys/the? 4,cost/local letter/does/Vietnam/how/it/to mail/a/in/much? 5,needs/a phone card/thousand dong/post office/fifty/the/Nhung/to/buy/at. 6,those/you/buy/are/souvernirs/want/the/to? 7,ahead/take/street/the right/staight/and/the/second/on/go. 8,you/thank/birthday/very/for/much/present/your. 9,the girls/most/of/in/enjoy/recess/catch/rope/my/skipping/class/and/playing. "Giup to nhe cac bạn "
sắp xếp
:1,a/send/how/cost/to/does/oversea/it/much/abroad/letter?
how much does it cost to send a letter oversea?
2,a/letter/how/is/much/USA/the/to?
how much is a letter to the USA?
3,total/the goods/mother/what/cost/your/is/of/buys/the?
what is the total cost of the goods your mother buys?
4,cost/local letter/does/Vietnam/how/it/to mail/a/in/much?
how much does it cost to mail a local letter in VN?
5,needs/a phone card/thousand dong/post office/fifty/the/Nhung/to/buy/at.
Nhung needs to buy a fifty thousand dong phone card at the post office?
6,those/you/buy/are/souvernirs/want/the/to?
are those the souvernirs you want to buy?
7,ahead/take/street/the right/staight/and/the/second/on/go.
go straight ahead and take the second street on the right
8,you/thank/birthday/very/for/much/present/your.
thank you very much for your birthday present
9,the girls/most/of/in/enjoy/recess/catch/rope/my/skipping/class/and/playing.
most of the girls in my class enjoy skipping rope and playing catch at recess
the tv show Agents of Shield averaged 8.0 million viewers its first season, 2013. The Big Bang Theory averaged 6.2 million viewers that same year. The marketing department Douse & Burnham was running the ad campaign for the Abacus Steam Powered Calculating Devices Corporating and they wanted to buy at least 30 commercial spots during episodes of Agents of Shield and The Big Bang Theory. The price for a 30 second spot during Shield cost $2000 while a 30 second spot during Big Bang cost $3000. The budget for the ad campaign was $70000 and they wanted at least 75% of the total number of spot to air during Shield. How many total spots should the marketing firm have purchased to reach the most viewers?
mrs lan bought 2 apples and 3 orange for 84000 dong. mrs hoa bought 4 appples and 5 oranges for 150000 dong. find the cost of 1 apples
the price of two apples and two oranger is
150000-84000=66000(đong)
the price of one oranger is
84000-66000=18000(dong)
the price of three oranger is
18000x3=54000(dong)
the price of two apples is
84000-54000=30000(dong)
the price of one apple is
30000 : 2=15000(dong)
answer:15000 dong
Dịch đề bài và cách làm bài sang Tiếng Việt nhé :3
Đề bài:Cô Lan mua 2 quả táo và 3 quả cam với giá 84000 đồng. Cô hoa mua 4 quả táo và 5 quả cam với giá 150000 đồng. Tìm giá của 1 quả táo.
Bài giải:
Ta thấy:
2 quả táo + 3 quả cam = 84 000 đồng
4 quả táo + 5 quả cam = 150 000 đồng.
Ta thấy 4 chia hết cho 2.Do đó,ta có thể rút 2 quả táo => 0 quả táo và 4 quả táo => 2 quả táo.
Khi đó,ta có:
0 quả táo + 3 quả cam = 84 000 đồng
2 quả táo + 5 quả cam = 150 000 đồng.
Theo cách trên,ta có giá 1 quả cam là:
84 000 : 3 = 28 000 (đồng)
Gía của 5 quả cam là:
28 000 x 5 = 140 000(đồng)
Gía của 2 quả táo là:
150 000 - 140 000 = 10 000(đồng)
Giá của 1 quả táo là:
10 000 : 2 = 5000 (đồng)
Đ/s:...
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