làm giúp mình 3 câu 8.9.10 vs mình đang cần gấp

1.tìm n thuộc z a,A=3x-5/2x+1 thuộc z b,B=3n+9/n-4 thuộc z c,C=6n+5/2n-1 thuộc z

Giúp mình phần bài tập này nhé! Cảm ơn các bạn nhiều ạ!

cho v lít co2 điều kiện tiêu chuẩn vào trong 300 dd Ba(OH)2 thu được x gam kết tủa nung nóng dd lại thu được 19,7g kết tủa tính v và x

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(1-1/21).(1-1/28).(1-1/36).......(1-1/1326)

Bài 1 a, Tìm STN x , biết : 128 - 3 . ( x + 4 ) = 23 [( 4 . x +28 ) . 3 + 55 ] = 35 ( 12 . x - $4^{3}$ ) . $8^{3}$ = 4 . $8^{4}$ 720 : [ 41 - ( 2 . x - 5 )] = $2^{3}$ .5 b, Tìm số tự nhiên x , biết rằng nếu nhân x với 5 rồi cộng thêm 16 , sau đó chia cho 3 thì được 7 c, Tìm số tự nhiên x , biết rằng nếu chia x cho 3 rồi trừ đi 4 , sau đó nhân với 5 thì được 15 CÁC BN GIÚP MIK LM HẾT NHA

(xin dau hieu nhan biet .-.) IV. Choose the correct answer to complete the sentences. 1. I love going to this place (so/ though/ so that/ as) it’s the quietest place in the city. 2. They keep changing the decorationof the shop (so that/ because/ although/ when) they can attract more young people. 3. (When/ Although/ Whereas/ In order to) she’s young, she’s the most famous artisan in the village. 4. Do you know who’s (bringing out/ taking over/ passing down/ turning down) his pottery workshop? 5. I’ve (found out/ closed down/ looked through/ lived on) the product catalogue and decided to buy this table. 6. This sports centre is so small that is cannot (keep up with/ face up to/ deal about/ set up) the demands of local residents.

(xin dau hieu nhan biet) III. Complete the passage by filling each blank with the correct form of the word in brackets. Some people ask me if I living in my hometown. The answer is certainly ‘yes’. The simple reason is that it has lots of (1. interest)____________ places. If you want to widen your knowledge of the past, you can go to the museum. It’s a (2. history)____________ building, with a big collection of valuable artefacts. There is also a craft village in my hometown. There, the (3. village)____________ make drums. Their drums are not only famous in the (4. local)____________, but also nationwide. You can visit the old workshop, where drums are still made in the traditional way. Some of them are huge! Another (5. attract)____________ in my hometown is the local library. It’s an (6. educate)____________ place where anyone can borrow books and take them home to read. Besides, it also has a (7. read)____________ club. I’m one of its members, and we gather once a week to discuss what we’ve read together. My hometown is also a (8. culture)___________ centre, with many traditional festivals and activities. I love it very much.

Cho hàm số y= -3x a) Vẽ đồ thị của hàm số b) Trong các điểm A(4; 3); B (-6:19); C (2;6) và D(2;-6) điểm nào thuộc đồ thị của hàm số (có giải thích) Giúp mik, hứa vote 5 sao nếu đúng!