hiện nay, tuổi con bằng 1/4 tuổi bố. Sau 15 năm, tuổi con bằng 2/5 tuổi bố. Tính tuổi mỗi người hiện nay . Giúp mik nhanh vs ạ, 4h40 mik phải nộp r

II. Change clauses of concession to phrases, using IN SPITE OF / DESPITE 1. He studied well though his life was hard at that time. 2. Although it rained heavily, I went to school on time. 3. He didn’t stop his car though the traffic lights turned red. 4. Although Jane was sad, she managed to smile. 5. Tom always studies hard though he encouters difficulties. 6. The flight was not delayed though it was foggy. 7. Although it got dark, they continued to work. 8. He did the test well though it was difficult. 9. My mother doesn’t wear glasses though she’s over fifty. 10. The plane took off though the weather was bad.

một đội công nhân theo kế hoạch mỗi ngày phải làm 40 sản phẩm. nhưng khi thực hiện thì mỗi ngày đội làm được 45 sản phẩm. do đó đội không những hoàn thành trước thời hạn 2 ngày mà còn vượt mức 20 sản phẩm. tính số sản phẩm mà đội công nhân phải làm theo kế hoạch

$\sqrt{3-\sqrt{5} }+$ $\sqrt{3+ \sqrt{5} }$

Giúp minh vs minh cần gấp.anht hơi mờ mong mọi ng thông cảm

a, Cho các số nguyên x,y,z thỏa mãn x^2+y^2+z^2=2xyz. CMR: xyz chia hết cho 24 b,Tìm tất cả bộ 3 số nguyên dương(a;b;c) sao cho (a+b+c)^2-2a+2b là số chính phương CẢM ƠN CÁC BẠN TRC NHA

1.They are sweeping the streets 2.The mailman had already delivered the mail 3.He used to borrow my pen 4.He had to finish his work on time 5,You needn't do all the homework 6.You ought to tell him early 7.They don't use the room very often 8.They must widen the road to school this year 9.Have you done your homework? 10Did you finish your work early? 11.The house was dirty because she hadn’t cleaned it for weeks. 10.She is taking care of the baby girl. 11.Children should treat old men with respect. 13.She was wearing her new T-shirt when I met her yesterday. 12,The waiter brings me this dish. 13.Our friends send these postcards to us. 14.Their grandmother told them this story when they visited her last week. 15.Tim ordered this train ticket for his mother. 15.You didn’t show me the special camaras. 16.She showed her ticket to the airline agent. 17.He lends his friend his new shoes. 17.She left her relatives five million pounds. 18.The shop assistant handed these boxes to the customer. 18.The board awarded the first prize to the reporter. 19.Have you sent the christmas cards to your family? 20.The committee appointed Alice secretary for the meeting. 20.He hides the broken cup in the drawer. 21.They keep this room tidy all the time. 21.They all voted the party a great success. 22.We gave Ann some bananas and some flowers. 23.They moved the fridge into the living room. 23.She bought some cups of tea to the visitors in the next room. 24.They find the new project worthless. 25.The secretary didn’t take the note to the manager.

(3.x-6).3=81 cần gấp mọi người ạ

Mây bn biết ap vẽ trên máy tính hay điện thoại đẹp hong gợi ý cho mik ik Mấy bn đã sử dụng qua nha và nêu rõ là máy tính hay điện thoại dùm đang tập vẽ

Làm nhanh , mình trả 5 vote và cảm ơn Cho góc vuông xAy .trên tia Ax lấy 2 điểm B&D ,trên tia Ay lấy 2 điểm C&E sao cho AB=AC&AD=AE a.Chứng minh Tam giác ACD và tam giác ABE bằng nhau b.Chứng minh tam giác BOD&COE bằng nhau .Với O là giao điểm của DC&BE