Cho tam giác ABC vuông tại A, đường cao AH. Hạ He vuông góc với AC, HF vuông góc với AB, EM vuông góc với BC, FN vuông góc với BC. CMR a) $\sqrt{MC}$ + $\sqrt{NB}$ = $\sqrt{BC}$ b)$\sqrt[3]{NB*NF}$ + $\sqrt[3]{MC *ME}$ =$\sqrt[3]{AB*AC}$

Giải giúp mik với ạ người nào vào trước giải câu 4 người nào vào sau giải câu 5 nhé! mik cần gấp lắm rùi

SARS (Severe Acute Respiratory Syndrome) is a deadly disease. Scientists haven't found the (28)......of this disease. SARS is dangerous because it develops quickly. Patients normally (29)......a high fever, a sore throat, and cough. Their body temperature is (30)......38°C. Antibiotics cannot cure SARS, and scientists are looking for a (31)..... to prevent the disease. Before they can find one, it is important to have a (32) ......lifestyle. You should keep fit, have plenty of fresh air, and eat lot foods with vitamin C. 28. A. reason B. cause C. source D. ground 29. A. make B. take C. have D. receive 30. A. above B. below C. more D. on 31. A. treatment B. cure C. tablet D. vaccine 32. A. healthy B. rich C. wealthy D. strong

rút gọn biểu thức a,P= (x-y)^2+(x+y)^2-2.(x+y)(x-y)-4x^2 b,Q=2.(x+y)(x-y)-(x-y)^2-4y^2

Xem giúp mình đúng hết chưa nhé. (Nếu chưa thì sửa lại cho mình.)

Viết lại câu: 1. I had feeling that I was talking in the air. -> I felt as though ____________________ 2.He spent his money like a prince. -> He spent his money as if. 3.She made up like an actress. ->She made up as if _______________________ 4.She cried like a baby. -> She cried as though ______________________ 5.Mary dresses up like a queen. ->Mary dresses up as if ____________________ 6.My head seems to be on fire now. -> I feel as if _____________________ 7.You speak like a prophet. -> You speak as though ___________________ 8.They talk like kings. ->They talk as if __________________ 9.I'm over 16 but my parents sometime treat me as though ...... CÂU 9 ĐỀ NÓ LÀ NHƯ VẬY, MÌNH CŨNG CHẲNG HIỂU LUÔN.

Bài3 tìm giá trị lớn nhất hoặc nhỏ nhất

Rewrite the following sentences so that their meaning stays the same, using the words given. 6. Vinh really loves to hang out with friends. (enjoys) …………………………………………………………………………………………. 7. Playing beach games is very interesting. (it is) …………………………………………………………………………………………. 8. It is not a good idea to spend too much time on computer games. (better to avoid) …………………………………………………………………………………………. 9. My parents insist me on learning something interesting. (wants) …………………………………………………………………………………………. 10. Jenny finds reading poetry boring. (dislikes) ………………………………………………………………………………………….

Các bạn giúp mình câu i và câu e nhé ! Cảm ơn nhiều. Mình cần gấp. Ai nhanh nhất : ctlhn+vote 5*. Đề bài là a/b = c/d. Chứng minh :

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