cách tách cacl2 ra khỏi hỗn hợp al,fe,ag xin đó

Đường thẳng (d): (m-1)x+(2m-3)y-m-1=0 song song vs đường thẳng (d'): x-2y+12=0 khi m bằng bao nhiêu?

Tìm x để biếu thức có nghĩa: `\sqrt{1+x^2}`

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Ex1: Give the correect form of the vebrs in the parentheses . 1. If only I (can take)__________the trip to HaNoi with her next summer 2. He was running very fast when he had a heart attack. If only he (not/run) _________so fast. 3. I wish they (visit)__________ us when they were in town 4. I wish that someday I (be) __________ able to marry her 5.It rained so hard that the party was cancelled. I wish it (rain) __________ 6.Tom likes football very much. He wishes he (become) _________ a proessional footballer 7.I wish she (come) ________ to see me yesterday 8. If only she had seen the doctor carlier. He (save) __________ her 9.I wish they (travle)_________ to Ha Long this summer 10. We have to take the bus home. I wish we (not live) so far from the city centre 11.He keeps whistling. I wish he (not do) __________ that all the time 12. What a beautifull house! I wish I(have)___________a house like this one 13. This computer is useless. I wish my parent (choose)___________ bettre one when they bought it 15. He's sorry he missed the wedding ceremony. He wishes he (go)_________

tìm GTNN của các biểu thức sau A=(x-2)^2 B= (x2-9)^4+/y-2/-1 C=(2x+1)^2 + 3(2x+5)

Đường thẳng (d): (m-1)x+(2m-3)y-m-1=0 vuông góc vs đường thẳng (d'): 3x+2y-100=0 khi m bằng bao nhiêu?

vẽ mầm cute bình thường câu cuối

Giúp mik với ạ mik đang cần gấp

hợp chất tạo bởi 2 nguên tử k ,1 nguên tử s và 4 nguên tử Abiết chất này nặng hơn Magie 7,25 a.tính phân tử khối của hợp chất b.xát định tên,kí hiệu hóa học