tìm x nguyên để biểu thức nguyên

helpppppppppppppppp meeeeeeeeeeeeee

There is no point in _____ the child now. What is done cannot be undone. * 1 điểm A. punishing B. teaching C. helping D. paying

dẫn luồng khí H2 dư đi qua ống sứ chứa 64g bột đồng ( II ) oxit. Sau phản ứng thu được 54.4 g chất rắn A) tính thể tích khí H2 đã phản ứng ở đktc B) tính hiệu suất phản ứng

Đề 3: Hãy giải thích ý nghĩa của câu tục ngữ “Thất bại là mẹ thành công” I. Mở bài: II. Thân bài III. Kết bài:

Find the one choice that best completes the sentence. He often _____ tennis in his free time. * 25 điểm plays is playing will play to play I usually wear skirts but today I ______ trousers. * 25 điểm wearing am wearing wear wears I’ve played the piano _____. * 25 điểm two years ago since 1995 before 1995 tomorrow Who _____ when John is likely to turn up? * 25 điểm know do know is knowing knows The sky is getting dark. It _______ rain is on its way. * 25 điểm looks like like seems to will be “ When _____ leaving for Toronto, Canada?” - “We are planning to set out at 10 o’clock.” * 25 điểm are we will we will up are us I ____ your uncle tomorrow, so I’ll give him your note. * 25 điểm have seen shall have seen am seeing going to see ______you _____from George recently? * 25 điểm Has / heard Did / heard Have / heard Have / hear Everything is going well. We ________ any problems so far. * 25 điểm haven’t had hasn’t had haven’t hasn’t Preserving natural resources_____ of great importance. D. are * 25 điểm is are being have been are I’ll hand over all my files to my assistant before I ____. * 25 điểm am leaving leave will leave shall leave I ............Louisiana state University. * 25 điểm am attending attend was attending attended I............in the room now. * 25 điểm am being was being have been being am I am tired. I _____ since breakfast. * 25 điểm am working work C. will work have been working It hasn’t rained _____. * 25 điểm last night today a month ago yesterday After Jessica ____ her degree, she intends to work in her father’s company. * 25 điểm will finish finishes finished is finishing She _____________ a living by working as a family tutor. * 25 điểm are earning is earned earns have earned It.............dark. Shall I turn on the light? * 25 điểm is getting get got has got Have you heard from John ______? * 25 điểm recently for two days two days ago since two days He hasn’t driven a car _____. * 25 điểm since June ready C. two years ago yesterday morning I don’t understand this sentence. What..................................... ...........? * 25 điểm does mean this word have this word mean means this word does this word mean John................... tennis once or twice a week. * 25 điểm usually play is usually playing usually plays have usually played I ............for Christine. Do you know where she is? * 25 điểm look looked am looking looks He _____ the novel several times but he still wants to read it again. * 25 điểm read reads has read reading - _____ you _____ to the National Museum? - Yes, twice. * 25 điểm Do … go Did … go Will … go Have … ever gone

một hình chữ nhật có diện tích là 98m2.biết chiều dài gấp đôi chiều rộng.tính chu vi hình chữ nhật.

Giải giúp mình với mng (tính hợp lý)

Chu vi của đường tròn có diện tích bằng 78.5 cm². Nhớ cho lời giải

Bạn giỏi toán thì giúp mình Xin chân thành cảm ơn