Giúp e các bước giải 2 bài này vs ạ, e gấp lắm ạ. E cảm ơn

cho hình nón có chiều cao h = 6 và bán kính đường tròn đáy r = 3. xét hình trụ đấy nằm trên hình tròn đáy của hình nón , đường tròn của mặt đáy còn lại nằm trên mặt xung quanh của hình nón sao cho thể tích khối trụ lớn nhất. khi đó , bán kính đáy hình trụ bằng a. 9/4 b. 2 c. 1 d. 3/2

Bài 1: Tìm các số nguyên x biết: a/ x/12=1/4 ; b/ -5/x=15/24 Bài 2: Cộng các phâm số sau a/ 4/9+2/9 ; b/ 7/12+-14/21 Bài 3: Trừ các phâm số sau a/ 1/6-1/3 ; b/ -13/15 ; c/ -4 - (-1/4) Bài 4: Tính a/ (-1).9/12 ; b/ 0.15/125 Bài 5: Tìm x biết a/ x.3/5=2/5 ; b/ 4/7 : x = -1/8 Bài 6: Tính giá trị biểu thức một cách hợp lý nhất A = 9/14 . 8/15 + 9/15 . 7/15 + 5/14

GIúp với ạ 9h20 là mik phải nộp rồi làm nhanh giúp mik 1 trang giấy ạ

Bác An có 15000 . Bác mua rau hết 5000 , mua hành hết 2000 . Hỏi Bác An còn lại bao nhiêu tiền

8/ A. destruction B. industry C. addition D. electric

Cho 5,6 gam Fe tác dụng với dung dịch chứa 7,3g HCl. Tính khối lượng chất dư và thể tích khí thoát ra (đktc)

What does they wear at their school? 2. Do he go to the library every week? 3. Windy always watch TV at 9 p.m before going to bed at 10 p.m. 4. Sometimes, we goes swimming together with her family. 5. How does Linda carries such a heavy bag?

vì sao phải yêu thiên nhiên, sống hòa hợp với thiên nhiên

mn giúp mình với mình đg cần rất gấp I’d hate _______ the exams, so I’m doing my best. * 1 point a. failing b. to fail c. fail d. failed I always enjoy _______ to my grandfather. He always tells me great stories. * 1 point a. to talk b. to talking c. talking d. talk Could you help me _______ the kitchen? It’s a real mess! * 1 point a. tidy b. tidied c. tidying d. with tidying Steven dislikes _______, so he usually takes a bus to work. * 1 point a. to drive b. to be driven c. be driven d. driving Jane prefers _______ music than to listen to it. * 1 point a. playing b. play c. to play d. played Marlene can’t wait _______ to the beach again. * 1 point a. to go b. going c. for going d. go I really regret _______ this computer – it’s useless. * 1 point a. buy b. to buy c. buying d. for buying Your child needs _______ some weight. Tell him _______ less junk food and more exercise. * 1 point a. to lose - eat b. to lose - to eat c. losing - to eat d. losing - eat I would love _______ to your party! Thank you for inviting me. * 1 point a. come b. coming c. to come d. came How much time do you spend _______ leisure activities? a.on b. in c. for d. with * 1 point a. on b. in c. for d. with Why don’t you apply for this job? It looks right _______ your street. * 1 point on in at up Many young people don’t _______ walking to school or playing active games? * 1 point a. prefer b. enjoy c. suggest d. want Daisy is _______ social media. She spends lots of time on Facebook and Instagram. * 1 point a. tired of b. bored with c. addicted to d. curious about _______ leisure time is free from compulsory activities, it is often referred to as “free time.’ * 1 point Because Although When As long as On YouTube you can find many videos on _______ all aspects of your English. * 1 point a. surfing b. working c. taking d. improving Some addicts are teenagers _______ are hooked on computer games. * 1 point which who what whose My sister enjoys _______. She usually walks around the mall, but not buying anything. * 1 point a. going shopping b. hanging out c. window shopping d. doing DIY You can raise a _______ pet like a Neopet if you aren’t allowed to own a real pet. * 1 point a. domestic b. virtual c. weird d. beloved “My favourite leisure activity is people watching.” “_______” * 1 point a. That sounds so weird! b. That’s all right. c. OK. That’s what you’ve chosen. d. Sure. It’s very entertaining.