5x^2y +5xy^2 -a^2x +a^2y Cảm ơn

Giúp mình với ạ mình đang cần gấp

VERB FORM: 1. People (know) how to dye even before they knew how to read and write 2. Tom was disappointed that most of the guests (leave) when he (arrive) at the party 3. I’m sure I (see) her four years ago 4. By 11 o’clock yesterday, we (arrive) at the airport 5. By 7am tomorrow, I (finish) all my work 6. Tom cleans the floor while his mother (cook) dinner. 7. They (return) to their native village after they (sell) their house in the city last month. 7. We (lose) her phone number, which makes it difficult (contact) her 8. By the time he (leave), his classmates (leave) 9. As he (drive) on a highway yesterday, he (meet) a terrible accident. 10. You can know the condition of this car only after you (use) it.

digi như hình dưới mà là nam nha thanks

Một người đi quãng đường dài 1,5 km với vận tốc 10m/s. thời gian để người đó đi hết quãng đường là bao nhiêu giây?

COMPARATIVE CLAUSES 1. Jane dances the most beautifully  No one 2. Peter writes more carefully than I  I 3. Tim runs faster than I  I 4. No one in the family is more sympathetic than Laura  Laura 5. Mary swims farther than her friends  Mary’s 6. We don’t study English so badly as Mai  Mai 7. My mother is the busiest in my family  Nobody 8. I didn’t swim so fast as Jane  Jane 9. Mary is a harder student than I  I 10. Bob is the most intelligent student in our class  Nobody

Để thủy phân hoàn toàn 17,6 gam metyl propionat cần dùng vừa đủ 40 gam dung dịch NaOH a%. Tính giá trị của a.

Không tính kết quả . Kiểm tra xem phép tính dưới đây có bao nhiêu số 0 1×2×3×...×19

hiện nay chị hơn em 20 tuổi . Tuổi chị bằng 3/7 tuổi em. tính tuổi em hiện nay giúp mình nha muộn nhất là 8h tối nha mình đan cần gấp. tóm tắt sơ đò nha

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