Giải thích các bước giải:
`(3x+5)/2-1<=(x+2)/3+x`
`<=> (3(3x+5)-6)/6<=(2(x+3)+6x)/6`
`=> 3(3x+5)-6<=2(x+3)+6x`
`<=> 9x+15-6<=2x+6+6x`
`<=> 9x-2x-6x<=6+6-15`
`<=> x<=-5`
Vậy `S={x|x<=-5}`
Đáp án+Giải thích các bước giải:
`(3x+5)/2-1≤(x+2)/3+x`
`⇔ (3x+5-2)/2≤(x+2+3x)/3`
`⇔ (3x+3)/2≤(4x+2)/3`
`⇔ (3(3x+3))/6≤(2(4x+2))/6`
`⇔ 9x+9≤8x+4`
`⇔ x≤-5`
Mong các anh giúp em kèm giải thích ạ hứa vote 5* + ctrlhn sieeu cảm ơn mấy anh chị ạ 1.This book is not really ________. It is a waste of money buying it.a. inform b. information c. informative d. informatively2.Sometimes it is ________ to find suitable books for our children.a. difficult b. difficulty c. difficultly d. difficulties3.Read the book ________ and you can find the information you need.a. care b. careful c. carefulness d. carefully4.Not many people find reading more ________ than watching TV.a. interest b. interested c. interesting d. interestingly5.To become a novelist, you need to be ________.a. imagine b. imagination c. imaginative d. imaginarily6.Mary enjoys reading _____, adventure, and whatever else she can either buy or borrow.a. romance b. romantic c. romanticize d. romanticism7.The novel has had a tremendous impact on ________ and publishing markets.a. entertain b. entertainer c. entertainment d. entertainingly8.The children have very different __________. a. personb. personalc. personalityd. personalities9.He talked ____________ of the past and his youth.a. romance b. romanticc. romantically d. romances10.Star Wars was created by a highly_________ writer.a. imaginableb. imaginativec. imaginaryd. imagination15.The film The First to Fly is an____biography of the two famous Wright brothers. a. entertainer b. entertaining c. entertained d. entertainment
Viết đoạn văn kể về tâm trạng của em trong 1 buổi khai giảng năm học mới.( lớp 8 nha) nope coppy
Mong các anh giúp em kèm giải thích ạ hứa vote 5* + ctrlhn sieeu cảm ơn mấy anh chị ạ 8.Chemical wastes from factories are _____ that cause serious damage to species habitats.a. pollutes b. pollutants c. pollutions d. polluters 9.Development of the area would _________wildlife. a. danger b. dangerous c. endanger d. dangerously 10.England was one of the first countries to ____________.a. industryb. industrialc. industrialize d. industrialization 11.Their ____________is rejected due to some problems of pollution.a. suggestb. suggestionc. suggestived. suggestible 12.We all regard pollution as a ____________matter to human beings.a. seriousb. seriouslyc. seriousnessd. seriousful 13.The people in our village are leading a ________life.a. peaceb. peacefulc. peacefullyd. peacefulness 14.We have to suffer a lot of floods due to our serious of forests.a. destroyb. destructivec. destructiond. destructor
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Mn xin hãy giúp mình kèm giải thích hứa cho 5* và ctrlhn 1._______ is a branch of Natural Science, and is the study of living organisms and how they interact with their environment.a. Biology b. Biological c. Biologist d. Biologically 2.A / an ______species is a population of an organism which is at risk of becoming extinct.a. dangerous b. endanger c. endangered d. endangerment 3.Only a few of the many species at risk of extinction actually make it to the lists and obtain legal ___.a. protect b. protection c. protective d. protector 4.Almost half of turtles and tortoises are known to be threatened with ____.a. extinct b. extinction c. extinctive d. extinctly 5.Current extinction rates are at least 100 to 1,000 times higher than _______ rates found in the fossil record.a. nature b. natural c. naturally d. naturalness5.It is reported that humans are the main reason for most species' declines and habitat _______ and degradation are the leading threats.a. destroy b. destructive c. destructor d. destruction6.They eventually realize that reckless _______ of the earth's resources can lead only to eventual global disaster. a. exploit b. exploitable c. exploitation d. exploitative7.Farmers make their soil more productive by distributing _______.a. fertile b. fertility c. fertilizers d. fertilizable8.Chemical wastes from factories are _____ that cause serious da
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