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数学 高校生

各辺を加えてから不等号の=が消えているのはなぜですか?

基本例題 33 不等式の性質と式の値の範囲 (2) 0000 x,yを正の数とする。 x, 3x+2y を小数第1位で四捨五入すると,それぞれ6, 21 になるという。 (1) xの値の範囲を求めよ。 (2) yの値の範囲を求めよ。 まずは、問題文で与えられた条件を、 不等式を用いて表す。 指針 例えば,小数第1位を四捨五入して4になる数は, 3.5 以上 4.5 未満の数であるから, aの値の範囲は3.5 ≦a < 4.5である。 解答 (2) 3x+2y の値の範囲を不等式で表し, -3xの値の範囲を求めれば,各辺を加えるこ とで 2y の値の範囲を求めることができる。更に,各辺を2で割って、yの値の範囲 を求める。 (1) x は小数第1位を四捨五入すると6になる数であるか ら 5.5 ≦x<6.5 (2) 3x+2yは小数第1位を四捨五入すると21になる数で あるから 20.5 ≦3x+2y<21.5 ① の各辺に-3を掛けて -16.5≧-3x> -19.5 -19.5<-3x≦-16.5 すなわち ②,③の各辺を加えて したがって 1<2y<5 各辺を2で割って 1/21<x</1/27 <ひく ar- ON 図 20.5-19.5<3x+2y-3x<21.5-16.5 xem người (*) 01-x8 II≤- H- 基本 32 YORUM 3x+2y-3x<21.5-3x 21.5-3x≦21.5-16.5(5) (M) STAT 15.5≤x≤6.4, (1) 5.5≤x≤6.5 などは誤り! ti 負の数を掛けると,不等 号の向きが変わる。 不等号に注意 (検討参照)。 正の数で割るときは, 不 等号はそのまま。 1 章 COTT 不等号にを含む・含まないに注意 検討 上の2yの範囲 (*) の不等号は, ≦ではなく < であることに注意。 例えば、 右側について VI>xas は ②の3x+2y<21.5 から ③の-3x≦-16.5 から 4 1次不等式 よって 3x+2y-3x<21.5-3x≦5 したがって, 2y < 5 となる (上の式の で等号が成り立たないから, 2y = 5とはならない)。 左側の不等号についても同様である。

未解決 回答数: 1
英語 高校生

答えわかる方いますか、、?

問1 ✩:"23 notebook is yours, the blue one or the green one?" ★: "The green one." 1 Which 2 Who by 2✩: "What time [24] your soccer game start this Sunday? I want to see it." ★: "10 a.m." Ⓒ did 2 do 3 willMnO2 91'#W" : * BY TROY LEW WOH" : & r 3: "Yuta plays basketball well, right?" ★: "Yes, so he [25] become a professional player in the future." E 1 won't 3 going to stay OS" : * bib 0 2 may I llada Ⓒ 6:"28 is your younger sister?" "She's 11." How far Whose to nsw 1": ★ ob Ⓒ 4:"26 go fishing next Saturday?" ★: "Sounds good. I'm looking forward to it." daini boy bic" : AT 1 Did you 2 Shall we 8€ 23Y": ★ 3 Should I gaiub ybsents m'l ob yb69ıle 10 snob vhasıls av'IⒸ 5: "I can't finish my report." ★: "If I 27 enough time now, I would help you." nob voY": 21 Ⓒhave had 3 hadtud uoy insiÍT" : ★ toy IWⒸ 1 bid 0 2 will have "Suoy [BE] un radiord way 2900": ✰ an 2 How old mir 3 How many l'uso I.asY* :* 1261 26 ni jastasl radi atent 7: "Dad, my smartphone is broken. It [29 work." ★: "OK. I'll check it for you."Xattiq web zyswls DOY: VA 1 isn't 2 don'til I 3 doesn't ob nY": ★ seussed nadw ( emoled Ⓒ 8: "What 30 there now?" ★: "They are having a dance practice." anotteoup yn [0]: Brum are they doing do they do 3 did they do nƆ 2Y": enstilt snA 9:"Is Mike absent from school today?" ★: "That 31 be possible. I saw him in the teachers' room." Ⓒ might 2 should 3 can't

解決済み 回答数: 1
英語 高校生

この答えが分かる方教えてください。

Lesson 1 Grammar 動詞 1 次の各文の( 1. My brother really reminds me ( 2. I congratulated Sue ( ) passing her driving test. 3. The sun, which is one of millions of stars in the universe, provides us ( heat and light. 目標 7分 内に下記の語群から適語を選んで補いなさい。 3. My brother ( a. believes 4. The band ( a.consists 4. He explained ( 5. The soccer team blamed their coach ( 【 for / of / on / to / with】 ) my father sometimes. ) me how the accident had happened. ) the 3-0 defeat. ) UFO's. 2 次の各文の( 内に入れるのに最も適当なものを選び, 記号を補いなさい。 1. I'm very fond of this old brooch because it ( ) my grandmother. a. belonged c. was belonging d. was belonging to 2. How long have you ( b. belonged to )? b. been marrying a. been married c. got married b. believes in c. is believing ) a singer, two guitarists and a drummer. b. consists of c. is consisting Writing 目標 → 3分 31.~4. は ( 内の語句を並べかえなさい。 5., 6. は英訳しなさい。 d. married. 3. Mother blamed (Jimmy / on / on / the carpet / the mud). (各2点) (各2点) d. is believing in 1. I would like to congratulate (from/graduation/on/you/your) high schoot. 2. We provided (for / a helping hand/those / were / who) in need. d. is consisting of (1~4:各3点/56: 各5点) 5. この歌を聞くといつも私はハワイで過ごした休暇のことを思い出します。 This song always 6. 彼は先生に遅れた理由を説明しました。 4. If you're not sure about the meaning of a word, (a dictionary/in/ it / look/up).

解決済み 回答数: 1
英語 中学生

本当にわからないです!すごく困ってます!答えだけでもよいのでお願いします🙇⤵️

① 次の英文は,中学生のサチコ (Sachiko) と留学生のエミリー (Emily) との対話です。 チ ケットとバスの時刻表を参考にしながらよく読み、 あとの (1)~(6) の問いに答えなさい。 (チケット) わかば中学校吹奏楽部コンサート 日時:○月×日 (日 ) 場所 : わかば市民ホール 午後 2:00 開演 (午後1:30開場) (10) (時刻表) 「団地口」 発 「市民ホール前」 着 12:41 13:01 13:06 13:25 Sachiko Do you like music, Emily ? Emily: Yes, I do. I play the flute. Sachiko: Oh, do you? I have two tickets for the *brass band *concert. One of my friends is a member of the brass band of Wakaba Junior High School. He plays the *trumpet. Can you go to the concert with me ? Emily: Oh, I want to. When is the concert ? Sachiko Next Sunday. Emily: Well, I am going to play tennis in the morning. What time will the concert start? Sachiko It will start② ( )( Emily: Then I can go with you. Sachiko At Wakaba *Town Hall. 4 ) in the afternoon. (3) 13:26 13:45 Emily: Sachiko: We have to take a bus to get there. Just a minute. I have a *timetable. (They are looking at the timetable together.) Sachiko: We have to take a bus from Danchiguchi to Shimin Hall-mae. Emily: How about the ( ) bus ? Sachiko: Well, it's too late. I want to get there before one thirty. Because the doors open at one thirty. But the ( )bus gets there too early. We have to wait about an hour before the concert. So the ( ) bus is the best. ⑦ *ticket : チケット, *brass band : 吹奏楽団 〔部〕, *concert: コンサート, ペット, * town hall: 市民ホール, *timetable: 時刻表 Emily: I see. Sachiko: Can you come to my house at twelve ? Let's eat lunch together. I will make lunch for us. Then we will go to the concert. Emily: OK. That will be nice. I can't wait. *trumpet: トラン (1) 下線部 ① エミリー (2) 下線部② し, 数字に It will s (3) 3 んで、記 ア Will イ How ウ Whe I Wha *have (4) 下線部 ずつ選ん ア 12 (5) 本文の ア Em イ Em ウ En I Em Sund (6) 次の まる最 Toda by( enjoye=

解決済み 回答数: 1
英語 中学生

本当にわからないです!すごく困ってます!答えだけでもよいのでお願いします🙇⤵️

① 次の英文は,中学生のサチコ (Sachiko) と留学生のエミリー (Emily) との対話です。 チ ケットとバスの時刻表を参考にしながらよく読み、 あとの (1)~(6) の問いに答えなさい。 (チケット) わかば中学校吹奏楽部コンサート 日時:○月×日 (日 ) 場所 : わかば市民ホール 午後 2:00 開演 (午後1:30開場) (10) (時刻表) 「団地口」 発 「市民ホール前」 着 12:41 13:01 13:06 13:25 Sachiko Do you like music, Emily ? Emily: Yes, I do. I play the flute. Sachiko: Oh, do you? I have two tickets for the *brass band *concert. One of my friends is a member of the brass band of Wakaba Junior High School. He plays the *trumpet. Can you go to the concert with me ? Emily: Oh, I want to. When is the concert ? Sachiko Next Sunday. Emily: Well, I am going to play tennis in the morning. What time will the concert start? Sachiko It will start② ( )( Emily: Then I can go with you. Sachiko At Wakaba *Town Hall. 4 ) in the afternoon. (3) 13:26 13:45 Emily: Sachiko: We have to take a bus to get there. Just a minute. I have a *timetable. (They are looking at the timetable together.) Sachiko: We have to take a bus from Danchiguchi to Shimin Hall-mae. Emily: How about the ( ) bus ? Sachiko: Well, it's too late. I want to get there before one thirty. Because the doors open at one thirty. But the ( )bus gets there too early. We have to wait about an hour before the concert. So the ( ) bus is the best. ⑦ *ticket : チケット, *brass band : 吹奏楽団 〔部〕, *concert: コンサート, ペット, * town hall: 市民ホール, *timetable: 時刻表 Emily: I see. Sachiko: Can you come to my house at twelve ? Let's eat lunch together. I will make lunch for us. Then we will go to the concert. Emily: OK. That will be nice. I can't wait. *trumpet: トラン (1) 下線部 ① エミリー (2) 下線部② し, 数字に It will s (3) 3 んで、記 ア Will イ How ウ Whe I Wha *have (4) 下線部 ずつ選ん ア 12 (5) 本文の ア Em イ Em ウ En I Em Sund (6) 次の まる最 Toda by( enjoye=

解決済み 回答数: 1
英語 中学生

誰かわかるかたはいませんか?答えだけでもよいのでお願いします🙇⤵️

① 次の英文は,中学生のサチコ (Sachiko) と留学生のエミリー (Emily) との対話です。 チ ケットとバスの時刻表を参考にしながらよく読み、 あとの (1)~(6) の問いに答えなさい。 (チケット) わかば中学校吹奏楽部コンサート 日時:○月×日 (日 ) 場所 : わかば市民ホール 午後 2:00 開演 (午後1:30開場) (10) (時刻表) 「団地口」 発 「市民ホール前」 着 12:41 13:01 13:06 13:25 Sachiko Do you like music, Emily ? Emily: Yes, I do. I play the flute. Sachiko: Oh, do you? I have two tickets for the *brass band *concert. One of my friends is a member of the brass band of Wakaba Junior High School. He plays the *trumpet. Can you go to the concert with me ? Emily: Oh, I want to. When is the concert ? Sachiko Next Sunday. Emily: Well, I am going to play tennis in the morning. What time will the concert start? Sachiko It will start② ( )( Emily: Then I can go with you. Sachiko At Wakaba *Town Hall. 4 ) in the afternoon. (3) 13:26 13:45 Emily: Sachiko: We have to take a bus to get there. Just a minute. I have a *timetable. (They are looking at the timetable together.) Sachiko: We have to take a bus from Danchiguchi to Shimin Hall-mae. Emily: How about the ( ) bus ? Sachiko: Well, it's too late. I want to get there before one thirty. Because the doors open at one thirty. But the ( )bus gets there too early. We have to wait about an hour before the concert. So the ( ) bus is the best. ⑦ *ticket : チケット, *brass band : 吹奏楽団 〔部〕, *concert: コンサート, ペット, * town hall: 市民ホール, *timetable: 時刻表 Emily: I see. Sachiko: Can you come to my house at twelve ? Let's eat lunch together. I will make lunch for us. Then we will go to the concert. Emily: OK. That will be nice. I can't wait. *trumpet: トラン (1) 下線部 ① エミリー (2) 下線部② し, 数字に It will s (3) 3 んで、記 ア Will イ How ウ Whe I Wha *have (4) 下線部 ずつ選ん ア 12 (5) 本文の ア Em イ Em ウ En I Em Sund (6) 次の まる最 Toda by( enjoye=

解決済み 回答数: 1