Theo tính chất dãy tỷ số bằng nhau, ta có:
$\frac{x}{2}=$ $\frac{y}{3}=$ $\frac{z}{4}=$ $\frac{x+y-z}{2+3-4}=$ $\frac{10}{1}=10$
$\frac{x}{2}=10⇒x=20$
$\frac{y}{3}=10⇒y=30$
$\frac{z}{4}=10⇒z=40$
Vậy $x=20;y=30;z=40$
Đáp án:
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Giải thích các bước giải:
Theo tính chất dãy tỷ số bằng nhau ta có:
`x/2=y/3=z/4=``\frac{x+y-z}{2+3-4}` `10/1=10`
`x/2=10⇒x=20`
`y/3=10⇒y=30`
`z/4=10⇒z=40`
Vậy `x=20; y=30; z=40 .`
Mọi người giúp mình câu 3 với,mình đang cần gấp
VII. Choose the correct answer 1. I got really ____________ when I saw the main character being killed. Critics star plot review disaster special effect Survey director documentaries must - see a. confused b. frightened c. bored d. amused 2. The film was so __________ that the two girls next to me couldn’t stop crying. a. Moving b. thrilling c. exciting d. fascinating 3. Critics were ____________ at John Travolta in Pup Fiction. He was unexpectedly good. a. Worried b. interested c. disappointed d. surprised 4. It is a ___________ tale of a haunted house and the ghosts therein. a. Amusing b. shocking c. thrilling d. pleasing 5. We were _________ that we couldn’t get tickets to see the film. a. Terrified b. satisfied c. relaxed d. disappointed 6. The ending of “American Psycho” was so _____________. It left viewers with questions. a. Confusing b. exhausting c. horrifying d. moving . My brother was so __________ he couldn’t watch the film. a. Overwhelmedb. scared c. annoyed d. excited 8. The Adventures of Macro Polo (1938) was highly __________, but lacked historical accuracy. a. disgusting b. encouraging c. entertaining d. exhausting 9. James finds sci-fi movies really ________. He enjoys watching then a. terrifying b. embarrassing c. concerning d. fascinating 10. Whenever I feel ___________, I watch a comedy that makes me laugh and feel better. a. depressed b. amused c. exhausted d. thrilled X. Join the two sentences using the word in brackets. 1. Glenne Close hasn’t won a single Oscar. She has been nominated six times, (although) ____________________________________________________________________________ 2. Brian Stone is a famous singer. He can’t sing folk song. (despite) ____________________________________________________________________________ 3. Some people said the film was terrible. I found it quite gripping. (Though) ____________________________________________________________________________ 4. It was a horror film. It wasn’t frightening at all. (in spite of) ____________________________________________________________________________ 5. The movie was a box-office failure. It had an all-star cast. (even though) ____________________________________________________________________________ 6. The film had good reviews. It was entirely ignored by awards bodies, (despite) ____________________________________________________________________________ 7. People criticized the movie for being too violent. The movie was a commercial success. (in spite of) 8. I liked it a great deal. I will likely never watch it again, (although) ____________________________________________________________________________ 9. The film had largely negative reception. Penn was nominated for Best Actor. (despite) ____________________________________________________________________________ 10. Critic reviews were favorable. The film was pulled early from theaters due to low ticket sales. (although) ____________________________________________________________________________
giải thích nữa nha .................
30 % của 1000 là 15% của 36 là mình cảm ơn
từ xanh nào có nghĩa là xanh tươi mỡ màng A, xanh ngát B, xanh mướt C, xanh thẳm D, xanh biếc
giải tự luận trắc nghiệm zúp mình với
Chủ ra các biện pháp tu từ trong các câu sau Trăm năm đành lỗi hẹn hò Cây đa bến cũ con đò khác đưa
A,Tại sao trong thơ, tục ngữ, ca dao lại hay sử dụng kiểu câu rút gọn B, Ở lớp em có khẩu hiệu "thi đua dạy tốt, học tốt". Khẩu hiệu đó thuộc kiểu câu gì? Vì sao?
Lực nào sau đây không phải là áp lực? A: Lực do búa tác dụng vuông góc vào mũ đinh. B: Lực kéo vật chuyển động trên mặt sàn. C: Lực mà lưỡi dao tác dụng vào vật. D: Lực do quyển sách tác dụng lên bàn nằm ngang khi nằm yên trên đó.
Tìm x biết: (-24):(-32)=15:x
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