giúp mk một số công thức hóa học: MgCl, Ba3(SO4)2, Na2O, KCO3, HSO4. Số công thức hóa học viết sai là A. 2. B. 4. C. 3. D. 1.

Giải hộ mình bài 1 từ E trở xuống nha

mọi người giúp em vs ạ, bài này em đang cần gấp, cảm ơn mn

Cho hình thang ABCD (AB//CD). Biết AB=AD a) CM DB là p giác của góc ADC b) Cho góc D= góc C= 60 độ. Tính Góc A,B c)Tính góc DBC

∣2x−3∣=∣4x−5∣ ∣3x−1∣=x−2 mình cần gấp mong mọi người giúp đỡ

VII-Mark the letter A, B, C or D to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions. 1. Acupuncture originated in China and has been used as a traditional medicine for thousands of years. A. began B. created C. developed D. introduced 2. Some people believe that acupuncture can be a cure of cancer. A. allergy B. practice C. therapy D. treatment 3. Acupuncture can ease nausea and vomiting caused by chemotherapy. A. increase B. prevent C. reduce D. spoil 4. Are there any alternatives that might provide better options for gay people? A. choices B. decisions C. judgements D. votes 5. The old blood cells are broken down by the spleen and eliminated from the body. A. cut out B. exhaled C. removed D. held VIII-Mark the letter A, B, C, or D to indicate the sentence that best combines each pair of sentences in the following questions. 1. We consume protein in meats and foods. We can stay concentrated and quick-minded. A. Protein in meats and foods which is consumed helps us stay concentrated and quick-minded. B. Protein in meats and foods which we consume helping us stay concentrated and quick-minded. C. We consume protein in meats and foods help us stay concentrated and quick-minded. D. We consume protein in meats and foods which helping us stay concentrated and quick-minded. 2. Everyone can do Pilates. It doesn’t matter if you are not fit. A. You can do Pilates as a method to keep fit. B. You can do Pilates no matter how fit you are. C. You cannot do Pilates only when you are not fit. D. You should do Pilates because you are not fit. 3. You drink green tea from twice to three times per day. It will bring you visible results by days. A. Despite you drink green tea from twice to three times per day, visible results will be brought by days. B. Due to you drink green tea from twice to three times per day, visible results will be bring by days. C. Even though you drink green tea from twice to three times per day, visible results will bring by days. D. Since you drink green tea from twice to three times per day, visible results will be brought by days. 4. Fatty acid level is low. It causes a higher risk of memory loss. A. Because of low fatty acid, a higher risk of memory loss is caused. B. In spite of low fatty acid, a higher risk of memory loss is caused. C. Since the low fatty acid, a higher risk of memory loss is caused. D. The result low fatty acid, a higher risk of memory loss is caused.

1. He has been very interested in doing research on _______ since he was at high school.a. biology b. biological c. biologist d. biologically 2.You are old enough to take _______ for what you have done.a. responsible b. responsibility c. responsibly d. irresponsible 3.Many Vietnamese people ______ their lives for the revolutionary cause of the nationa. sacrifice b. sacrificed c. sacrificial d. sacrificially 4.They had a ______ candlelit dinner last night and she accepted his proposal of marriage.a. romance b. romantic c. romantically d. romanticize 5.She sent me a _______ letter thanking me for my invitation.a. polite b. politely c. politeness  d. impoliteness 6.As an _______, Mr. Pike is very worried about the increasing of juvenile delinquency.a. educate b. education c. educator d. educative Mn xin hãy giúp mình ạ , chỉ cần ghi đáp án kèm giải thích hứa cho 5* + ctrlhn

Lm đúng giải thik rõ cho e vs ạ e c.on

Tìm x (x-2)³-(x-4)(x²+4x+16)+6(x+1)²=49 Giúp mình với

Biết số tự nhiên a chia cho 5 dư 4. Chứng minh rằng a2 chia cho 5 dư 1.