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数学 高校生

鉛筆で四角く囲ったところの範囲がどうしてこうなったのか教えて欲しいです🙇

例題 84 2次不等式の応用 長さ 80 cm の針金がある.これを2つに切って,それぞれの針金を折り 曲げて正方形を2つ作る.2つの正方形の面積の和が 218 cm°以上となる ようにするには,針金をどのように切ればよいか. 短い方の針金の長さの 範囲を求めよ。 (徳島文理大) 考え方まず, 何を文字でおくか考える。 針金の長さをxcm とおくと… ここでは,短い方の針金の長さの範囲を求め たいので, 短い方の針金の長さを文字でおく。 このとき,右の図のように針金は正方形に折 り曲げて考えるので, 文字はxではなく, 4x cm とおく. cm 針金の長さを4x cm とおくと… xcm 短い方の針金の長さを 4x cm とすると,長い方の針金の 長さは, 0<4x<40 より! 2つの正方形の1辺の長さは,それぞれ,x cm, (20-x) cm だから, x2+(20-x)?2218 2x2-40x+400>218 解答 80-4x=4(20-x) (cm) 0<x<10 ……① x 20-x 2x°-40x+18220 x2-20x+91NO (x-7)(x-13)20 より, .2 xS7, 13<x D, 2の共通部分は, 0<x£7 よって, 0<4xハ28 だから, 短い方の針金の長さ の範囲は, 0 cm より長く, 28cm 以下とすればよい。 0 7 10 13 x Focus 文章問題は, の何を文字でおくか 2求めた解の吟味 (条件を満たしているかどうか) が重要

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古文 高校生

答えが合っているか教えてください! 4と6の部分は語尾が「ば」になっていますが、そのときは已然形と判断していいですか??

3 T文章問題|次の文章を読み、後に続く問いに答えよ。 0をS- 次の文章は『大鏡』」の一節で、夏山繁樹が昔の出来事を語る場面である。 いとをかしうあはれに侍りしことは、この天暦の御時に、清涼殿の御前の梅の木の枯れたりしかば、求 |とき、承りて、「若き者どもはえ見知らじ。きむぢ求 帝の命をお受けして、 見分けが付けられまい。 一 めさせ給ひしに、某ぬしの蔵人にていますがり一 めよ」とのたまひしかば、一京まかり歩き2_ども侍らざりしに、西京のそこそこなる家に、色濃く咲きた いへあろじ る木の、様体うつくしきが侍り3_を、掘り取りしかば、家主の、「木にこれ結ひつけて持て参れ」と言はせ や 給ひしかば、ある様こそはとて、持て参りて候ひしを、「何ぞ」とて御覧じ一4|ば、女の手にて書きて侍りける。 何か訳があるのだるうと思って、 4。 しるか 勅なればいともかしこし驚の宿はと間はばいかが答へむ 帝のこ命令であるのでとても恐れ多うございます。(とはいえ、この梅の木に慣れた)驚が自分の家は (どうなった)と尋ねたら、私はどう答えましょうか *つらゆき とあり5に、あやしくおぼしめして、「何者の家ぞ」とたづねさせ給ひ[6 ば、貫之のぬしの御女の (帝は)不思議にお思いになり、 住む所なりけり。 (大盤||O1) 注 *清涼殿…宮中で天皇が日常生活を送る御殿。 *きむぢ…二人称。「おまえ」、「そなた」。ここでは夏山繁樹を指す。 VろnuJろ *蔵人…蔵人所の役人。天皇の秘書の役割を担った。 *貫之のぬし…紀貫之のこと。 間-□ ~3-には助動詞「き」が、「4_~ 6|には助動詞「けり」が入る。それぞれ適切な形に 活用させて記せ。各2点」 る す こミ 問二 次の文は、本文中で過去の助動詞「き」と「けり」が使い ろ6

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英語 高校生

文章問題です ヒントだけでもよろしくお願いします

で ュ sp7 > > i = a Have you ever cleaned the toilet in your house? Some people dont want to clean re are volunteers who clean the toilets i EtS im toilets because they are usually dirty. But the Among these DeoDle, there is a man wa public places like parks and schools. is the president of the company, started cleaning toilets for hiS comDany. He the man started cleaning toilets for his company. He Yanted 3 About 50 years ago, all the workers of his company {oO do their best their work. But some of the y, so their mannerS WCre bad. At frst the man workers were tired and didnt feel happ He knew that the office and the toilets the didnt know what to say to them. company building were very dy Then h So with ヵthis idea, he started to clean 引 the toilets e thought。 “The workers wil feel happy iO they can work in a clean office.* im the company building. Some of the workers were surprised and said, "Why js ie president doing such a thing? He should do his work as president.′ But he siil cleaned them every day. After a few months, some workers began tO nnderstand his idea. They started to i5 come early in the morning and helped him to clean all the toilets in the company building. Soon more workers started to help him. Finally all of the workers cleaned the toilets together 6 Then, the man started cleaning the toilets im the public places near his company 1 ( Ople jing near his company joined him、His lunteer group Were invited to a junior there were dirty. Some of them their school a happy place for every toilets was important for making e teachers and the students how orked hard together. After 3 r They became kind

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英語 高校生

文章問題です よろしくお願いします

10 15 上 デア にしダン PD ジー ニニデーーニー ee ーーとーー のマーー ーー 右 A long time ago, there lived a merchant in England with his beauf 6計 Tage ad to go to prison. Ugl *money-lender。 Though the money-lender waS old and ugly, he wanted Very mu の 9 daughter. In those days, if a person borrowed money and couldnt return i季 he 衣 Unfortunately。 this merchant OoWe ed a lot of money to a marry the merchants beautiful daughter. S0, he said he would cancel the merchamr。 *2debt if the merchant would agree to give him his daughter. 加 Neither the merchant nor his daughter jiked pis_ idea, but they diqnt Im what else to do. One day the *?cunning moneydender said to them, Lets ply *a game of chance. 1 will put a black stone and a white stone into this empty bag 2 Then he looked at the merchants beautiful daughter and said, "You must take one ot the stones. Hf you take the black stone, you W山 mmarry me and your fathers deht mil be cancelled. Hf you take the white stone, You can St4Y with your father and the debt will sil be cancelled。 But Histen! HE you refuse to take a stone, your father will be *5thrown into jail So, pick carefully my girl" 回 The merchant and his daughter had no choice, So they agreed to try it The three people were standing on a path in the merchanfs garden. There were manmy small stones on fhe path。 The money-lender picked up two small stones and quicky The girl was looking carefully at him, and she noticed that he among the other stones. "Oh Im MI T you look into the b85

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