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8 tháng 5 2020

bạn nào giúp mình với mình đang cần rất gấp

8 tháng 5 2020

x+y=22 và 5x+8y=155

Giải

C1: x+y=22 

=> y=22-x (*)

Thay (*) vào 5x + 8y=155, ta có:

5x + 8(22-x) =1 55

5x + 176 - 8x = 155

5x - 8x = 155-176

-3x = -21

x= (-21) : (-3)

x= 7

x + y = 22

7 + y = 22

=> y = 22-7

y = 15

Vậy: x=7; y=15

C2: Bạn có thể suy ra x thay vì y ở bước đầu, kết quả vẫn giống nha ~

Read the following text and use the words given in the box to fill in the blanks.everyone      level         among        answer       formwhen            live          more           and             in  While big cities tick over at a fast pace, regional communities operate at the exact opposite. The Australian Unity Wellbeing Index has found that those who (1) _____in rural areas experience significantly higher (2)______of...
Đọc tiếp

Read the following text and use the words given in the box to fill in the blanks.

everyone      level         among        answer       form

when            live          more           and             in

 While big cities tick over at a fast pace, regional communities operate at the exact opposite. The Australian Unity Wellbeing Index has found that those who (1) _____in rural areas experience significantly higher (2)______of wellbeing, with regional areas like Maranoa in Queensland reporting levels of life satisfaction (3) the highest in the country. Australians living in rural areas area also reported to be (4) ___socially cohesive, feeling safer in their community and being more likely to give back in the (5)______ of volunteer work. Rural homeowners are often less stressed and feel more connected with those in their neighborhood (6)______ compared to those who live in cities. Is the country life for (7)______? Sure, it has its benefits, but not everyone is ready for a slowdown in their life pace. There are also notable drawbacks, such as a longer commute for those who are still working (8)_____ the city. If you're looking to escape the hustle (9) ___ bustle, however, a move to a larger and more affordable property in the countryside might just be the (10)___ to your problems.

2
8 tháng 5 2020

 While big cities k over at a fast pace, regional communities operate at the exact opposite. The Australian Unity Wellbeing Index has found that those who (1live in rural areas experience significantly higher (2) level of wellbeing, with regional areas Maranoa in Queensland reporting levels of life satisfaction (3) the highest in the country. Australians living in rural areas area also reported to be (4) more socially cohesive, feeling safer in their community and being more ly to give back in the (5) form of volunteer work. Rural homeowners are often less stressed and feel more connected with those in their neighborhood (6) when compared to those who live in cities. Is the country life for (7) everyone ? Sure, it has its benefits, but not everyone is ready for a slowdown in their life pace. There are also notable drawbacks, such as a longer commute for those who are still working (8) in the city. If you're looking to escape the hustle (9) and bustle, however, a move to a larger and more affordable property in the countryside might just be the (10) answer to your problems.

8 tháng 5 2020

Ấy chết thiếu câu (3), câu (3) là among nha!

15 tháng 5 2020

câu này lớp 3 cũng làm được nói chi lớp 7 

mà đây là Toán chứ có phải là Tiếng Anh đâu

        LẠC ĐỀ BẠN Ê

24 tháng 5 2020

4,5m bạn nhé 

7 tháng 5 2020

cắt đi 50%

7 tháng 5 2020

Bị cắt đi 50%

7 tháng 5 2020

Bạn tham khảo link này nhé!

https://h.vn/hoi-dap/question/424498.html

6 tháng 5 2020

a

\(x+3⋮x\)

\(\Leftrightarrow3⋮x\)

\(\Leftrightarrow x\inƯ\left(3\right)\)

\(\Leftrightarrow x\in\left\{1;3;-1;-3\right\}\)

b

\(x+y+xy=4\)

\(\Leftrightarrow x\left(y+1\right)+\left(y+1\right)=5\)

\(\Leftrightarrow\left(x+1\right)\left(y+1\right)=5\)

Xét ước đi là ra

6 tháng 5 2020

Vậy đề bài và câu hỏi là gì thế?

              TL: ko có câu hỏi nên ko thể làm!

                                   ~HOK TỐT~