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数学 高校生

(2)の6<2a+5≦7の所でなぜ6は含まれないのに 7だけが含まれるのかがわからないです

基本例題 33 不定! 1次不等式の整数解 (1) 不等式 6x+8 (6-x) > 7 を満たす2桁の自然数xの個数を求めよ。 (2) 不等式5(x-1)<2(2x+α) を満たすxのうちで, 最大の整数が6であ ●基本 29,32 るとき,定数aの値の範囲を求めよ。 CHART & T HINKING 1次不等式の整数解 数直線を利用 まずは, 与えられた不等式を解く。 (1) 2桁の自然数 - x≧10 範囲を 10≦x≦n の形に表す。 この不等式を満たす整数の個数は? (2) 不等式の解はx<A の形となる。 数直線上でAの値を変化させ,x<A を満たす最大 の整数が6となるのはAがどのような値の範囲にあるかを 考えよう。→x=6 は x<A を満たすが, x=7 は x<A を満たさないことが条件となる。 解答 HATA (1) 6x+8(6-x) > 7 から -2x>-41 41 ゆえに -=20.5 は2桁の自然数であるから 10≤x≤20 求める自然数の個数は x< これと不等式の解を合わせて, 条件を満たす整数xの値の MINORIA のときである。 ゆえに 1<2a≦2 よって <ası> ( FRANARE 10 11 20-10+1=11 (個) (2) 5(x-1)<2(2x+α) から x<2a+5 ...... ① ①を満たすxのうちで最大の整数が6となるのは 6<2a+5≤7 s 2桁 20 41 12 HOPISHGA ←展開して整理。 21 6 2a+5 7 x LIGIHARASS ①を満たす最大の整数 不等号の向きが変わる。 ◆解の吟味。 ←展開して整理。 6<2a+5<7 とか 6≦2a+5 ≦7 などとし ないように。 等号の有 無に注意する。 不等式は α=1のとき, x<7で、条件を満たす。 a=1/12 のとき, 不等式は x<6で、条件を満たさ ない。

未解決 回答数: 1
英語 高校生

至急答えと なんでそうなるのか お願いします😭

2 する _-) 16 A B 動詞 ・ 述部に関する問題 ② ② 別冊解答 p.22~2 選択 FEAR 空所に入るもっとも適切な語(句) を選びなさい。 問題 ) his position as an ALT at the beginning of the next 1 Mr. Richard ( month. has started has been started (宮崎大) 4 will be started 3 started ) athletes 2 Mental training, such as visualization and meditation, ( over the years. 2 has been practiced by has practiced ( 慶應義塾大) 4 has been practice among 3 has been practicing 3 A: What are you going to do tomorrow? B: There's nothing particular I need to do, so I ( 1 may 3 must ) just stay at home. (北海学園大) 4 couldn't 2 can't ). (追手門学院大) A: I'm thinking about going to Hawaii during Golden Week. B: You should make a reservation ( 1 quickly as possibly as you can 3 as possibly quickly as you can 2 quickly as possibly as 4 as quickly as possible 5 The secretary had her salary ( 1 raise 2 raised ) twice a year. risen 4 rose (藤女子大) the traffic rules, but so many of them 6 All drivers are expected to ( run red lights. 1 look 2 observe (3) see 4 watch (秋田県立大) 7 After he joined the travel agency, he worked hard to improve his English in order to carry ( ) his duties more effectively. 1 away 2 back 3 off out (センター) 8 Eric's friends, Minoru and Sachiko, will be here at seven this evening. He ( ) doing his homework by then. 1 has been finished 2 has finished 3 will have finished 4 would finish (センター) 動詞述部に関する問題 ② 第4回 1 学習日 第4回 年

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英語 高校生

和訳が全くできないんです泣 同じ教科書の方教えてください🙏

Dete Lesson 7 One Team, One Courtiy Pare1 Prop Lmaginel groning up inacounty with no basic freedons. 想修す3 自由 Cavsr) 3レスト 内長する Y you drank out of the wrong water fountain, you might be amesTed by 7hem Capirteit) 逮捕する パートヘイト Growing up in Sourth Africa under apartherd meant that this and wose 384へイト Cdéit) ダイリー thngs were part of dialyn life. 日記 Caeiká:nm) アフリカーンス Cp1an) シ Crajal) リーンル Apartheid, which meansapariness, in Atritaans, wasa policy of raciol dkrimanejan] Tiagリミネーション Lmain (0)e3フリカーンス語 マイノッラィー 政策、右針 人種 discrimina tion made by the white minority govervent in (948. 少数 Cmadg5c)ati] [papjaleia マジョリティ ポらレーション The black najorty population had no freedom to (1ve トロ [pesbik] スファク They aluays hod to take apass bep with Them. or TOg0 they wanted 10. where 大多数 検金遺供 they forgot TO Carry it, the police could anest them oreven kill then. Nelcon Mondela fougnt ogainst such injustice as a leader of the のnt-oportheida move ment. 打の C prian] of thot, in1962 he was arrested and put inprison、 Beonuse Ckwう:rter] クイーター 刊り務所にCdse 刊務的 れる ー For mare Thon a guorter.ofa century, even injail 4分の1 he was o symbol of black peaples hope for Jreedom . リ務所

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英語 高校生

答えが無くて分からないので教えて欲しいです

SIMなし合 22:01 Cop 【1】次の英文を読んで, 設問 1~12に答えなさい。 なお, *印の語(句)には文末に注 がついています。 Modern examinations of working conditions in British and U.S. industry in the nineteenth and early twentieth centuries concentrate mainly on the experiences, Complaints, and overall difficulties of working-class laborers. The first complaint that a majority of industrial workers had was that their workdays* were too long. The average (ア) of hours in a shift varied from industry to industry, from place to place, and from era to era. Workers in British and American textile mills* in the early to middle 1800s generally worked twelve to fifteen hours, six days a week, ( イ) only Sundays off. Their average workweek* was seventy-eight hours. In contrast were the hours of workers who labored in American steel mills in the late 1800s. The length of their shifts was determined by the fact that the blast furnaces* they tended almost always operated twenty-four hours a day. Thus, (oit became customary* for steel mills to have two twelve-hour shifts. However, many of the steel workers labored seven days a week. (a)That gave them a workweek of sighty-four hours. Moreover, sometimes they had to work extra hours on top of this demanding schedule. (オ )the minor differences in the length of workweeks from one industry to another, the average worker put in twelve-to fourteen-hour days at least six days a week, This harsh schedule remained more ( カ) less standard well into the twentieth century. It was not until 1920 that a fifty-hour workweek was introduced in the United States. Anda forty-hour week did not become the rule in most industries until 1938. Low wages was another common complaint of industrial workers. In 1851, the average wage earned by American industrial workers in general was seven to ten dollars per week. That same year New York's Daily Tribune* reported that a worker's family of five required just over ten dollars a week just for basics such as rent, food, and fuel. Most ordinary workers could not afford many simple comforts that middle-class workers enjoyed. (o This miserable situation lasted in America for decades and improved only slowly. As late as 1912, a study found that only 15

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