なぜこの式がkの値にかかわらず2直線の交点を通る直線を表すのかが分かりません 教えてください🙇‍♀️

基本 例題 77 2直線 2x+3y=7 2直線の交点を通る直線 129 00000 ...D, 4x+11y=19 直線の方程式を求めよ。 ・・・・・・② の交点と点 (5, 4) を通る p.121 基本事項 基本 76 CHART & SOLUTION 2直線 f (x,y)=0,g(x,y)=0 の交点を通る直線 方程式 kf(x,y)+g(x,y)=0 (kは定数)を考える ↑x,yで表される式をf(x, y) などと表す。 問題の条件は2つある。 [1] 2直線 ①②の交点を通る [2] 点 (5, 4) を通る そこで、まず①,②の交点を通る直線(条件[1]) を考え、次に,この直線が点(5, 4) を通 (条件 [2]) ようにする。 解答 kを定数とするとき、次の方程式 ③は, 2直線 ①,②の交点を通 る直線を表す。 k(2x+3y-7)+(4x+11y-19)=0 91 (2) 19 ③ 11 0 ③が,点 (54) を通るとすると, ③にx=5,y=4 を代入して 73/ \72 19 3 11 直 (5,4) 別解 2直線 ①.② の交 点の座標は (2, 1) よって, 2点(2, 1), 線 (54) を通る直線の方程 式は 4-1 (x-2) すなわち x-y-1=0 15k+45=0 よって k=-3 これを③に代入すると -3(2x+3y-7)+(4x+11y-19)=0 整理すると x-y-1=0 INFORMATION 2直線の交点を通る直線 交わる2直線ax+by+c=0, ax+by+c2=0 に対して ****** (*) k(ax+by+c)+azx+bzy+c2=0(kは定数) は,kの値にかかわらず2直線の交点を通る直線を表している。(ただし、直線 ax+by+c=0 は除く。) 2直線の交点(x, y) は, ax+by+ci= 0, a2x+by+c=0 を同時に満たす点であ るから, (*) はんの値にかかわらず成り立つ。 すなわち, (*) は2直線の交点を必ず 通る直線になる。この考え方は直線以外の図形を表す場合にも通用するので,応用範 囲が広い (p.154 例題 94 参照)。 770

5行目から6行目にかけての黄色マーカー部分のleftがどのような文構造で働いているのか分からないので教えて頂きたいです。

5 の前 4. The link between brain size and intelligence is naively simplistic. It is not the size that matters but how you use it. There are some people a who are born with little brain tissue or others with only half ǎ brain as a result of disease and surgery, but they can still think and perform within the normal range of intelligence, because what brain tissue they do have left they use so efficiently. 効率 1601- cient 能な をひきおこす。 ch む doの後なので 現実は父

【完了形】これの大問2番なんですけど、過去完了と過去形どうやって見分けたらいいんですか(泣)詳しくそのコツを教えて下さい

第 7 章 完了形 (2) P.27-35 [B FACTBOOK 1 Put the words in the correct order and complete the sentences. Change the verb the correct form. Ex. [out/he/go/just] when I arrived. He had just gone out when I arrived. 1) [Malaysia/she/in/live] before she came to Japan before she came to Japan. 21 057 2) I noticed [the taxi/I/in/leave / my umbrella ]. I noticed I wasn't hungry because [ lunch/I/ have / just ]. I wasn't hungry because 2. Change the verb into the correct form and complete the sentences. a) The house was very quiet when I got home. Everybody bed. (go) b) I felt very tired when I got home. I a) I missed the class. The train hour. (be) b) The train (be) 3) a) We were very proud that she b) She to straight to bed. (go) 3) 057 delayed for more than one 2) 041 05 delayed for one hour and it was very crowded. the silver medal. (win) the silver medal, but she wasn't very happy. (win) 3) 041 0 Read a sentence and complete the second sentence with the words given. Change th verb into the correct form. Ex. It is 10 o'clock now. When we get there, [start/ already / the film ]. When we get there, the film will have already started. We will leave early tomorrow. [breakfast/we/ already / eat] when you get up. The sky is beginning to clear up. this evening/this rain / by/stop ]. 1) 0 when you get up. 2)

ピンクで線を引いた文頭にあるBesidesの品詞は前置詞ですか？それとも副詞ですか？ わかる方お願いします🙇‍♀️

' 教科書 p.34 意味のまとまりに注意して, 本文全体を聞こう。 O 1-30 During his work, Ono trained the local people so that they could S" He taught them to replace the continue to dig wells on their own. // wells 2 materials (used in traditional Kazusabor) with more suitable ones nes (for Africa) He also changed some technical Japanese terms into plain English words. // There is a saying he cherishes / 52444 "If your friends are hungry do not give V friends are hungry / S them/fish, but teach them how to catch them. // He thinks that teaching 05 5 teaching well-digging techniques / to local people)/ is better than simply making wells/for them C S noten 8 Ono ater established an NPO, the International Water Project (IWP). // Although there have been many hardships /n its operation it has completed/ more than 100 wells so far. // Besides digging wells the members are teaching o レ // wells/ children / the importance of planting and growing trees for the future. C (V) (0)

英語です 右の波線部分のwhich of はどういう用法ですか？

are given only one number and asked to solve for two unknowns. 13Thus you find that there are many possible alternative answers, and you have no way of determining which of the many possible answers is the best.

合ってるか見てほしいです🥲‎

12. I'm very glad ( ) the news. hearing ②to to hear 3 to hearing 1 heard □ 13. 書くペンがありません。 [ 語順整序 I have (with/to/ no pen / write). no pen to write with 14. A new supermarket is going to ( ①build 2 be pe built ) next year. (駒澤大) (福岡工業大) ( 神戸学院大) ③be building building 15. すべてが円滑に進んでいるようである。 Everything (smoothly / seems/be/to/going). seems to be going smoothly, (東邦大) 16. The picture seems () in the 1600s. (日本大) ①that it has been painted that it was painting 3 to be painting to have been painted 不定詞 (摂南大) ①not to 17. I swam in the river, even though my parents had told me ( ). ①don't to not 3 not do it □18. この映画は, 何度見てもいいほど面白い。 (金沢工業大) This (enough/interesting is / many/movie/watch/times/to). movie is interesting enough to watch many times. □19 こんな時間に来るなんて、 彼はなんて無神経な男なんだ。 (十文字学園女子大) How could he be so (as / at /to/ come / insensitive) a time like this? insensitive as to come at 20 この数学の問題は, 私には複雑すぎて解けない。 This (me/to/complex / math /too/is/problem / for) solve. too complex for me to math problem is 21. 私のコンピュータを修理するのに300ドルかかった。 It (repair/three hundred / cost/my/ dollars/me/to) computer. (尾道市立大) cost me three hundred dollars to repair my 22. The meeting is ( ) in Chicago next month. ①to be held 2 hold ③holds (日本大) (神奈川工科大) to holding

英文の方写真汚くて申し訳ないです汗　 ３パラグラフ目の印のしてあるaround が、和訳中のどの部分に当たるか分かりません。教えていただきたいです。

テーマ 専門性☆☆☆ 英文レベル★★★ 30 DNAはウイルスから? 文 11 What with the threat of bird flu, the reality of HIV, and the genera unseemliness of having one's cells pressed into labour on behalf of something alien and microscopic, it is small wonder that people don't much like viruses. But we may actually have something to thank the little 5 parasites for. They may have been the first creatures to find a use for DNA, a discovery that set life on the road to its current rich complexity 12 The origin of the double helix is a more complicated issue than it might at first seem. DNA's ubiquity -all cells use it to store their genomes - suggests it has been around since the earliest days of life 10 but when exactly did the double spiral of bases first appear? Some think it was after cells and proteins had been around for a while. Others say DNA showed up before cell membranes had even been invented/ The fact that different sorts of cell make and copy the molecule in very different ways has led others to suggest that the charms of the double 15 helix might have been discovered more than once. And all these ideas have drawbacks. "To my knowledge, up to now there has been no ⚫ convincing story of how DNA originated," says evolutionary biologist Patrick Forterre of the University of Paris-Sud, Orsay. 13 Forterre claims to have a solution. Viruses, he thinks, invented » DNA as a way the defences of the cells they infected. Little more than packets of genetic material, viruses are notoriously adept at* avoiding detection, as influenza's annual self-reinvention attests. Forterre argues that viruses were up to similar tricks when life was young, and that DNA was one of their innovations. To some researchers 25 the idea is an appealing way to fill in a chunk of the DNA puzzle. 270 •

四角7の問題の答え全て教えて頂きたいです🙇🏻‍♀️‪‪

7 与えられた状況に合うように( )内の語句を並べかえ, 全文を書きなさい。 ただし、不要な語 句が1つずつ含まれています。 (1)状況 雨上がりに 「虹だ!」 とざわめく人々。 私も空を見上げたのですが･･･。 The rainbow (I / fading / faded / when / looked up / was) at the sky. (2)状況 友人と食事をしているとき,子どものころにだけ好きだった食べ物を聞かれ...。 When (was/used/little/I/ like / use / to/I) watermelon CD (3)状況 地震があったらしいのですが気づきませんでした。なぜなら・・。 I (because / the earthquake / swam/ didn't notice/swimming/ was/I) in the pool.

4 解説お願いします🙇🏻‍♀️ 私の答えは気にしないでくださいm(_ _)m

1006+10c+a B 一の位に移してできる自然数をBとする。 このとき, A-Bは9の倍数である。このわけ を説明せよ。 1000+10btc A (100at10b+c)-(100bt1octa) 学 5 このように表すと、 こ -901=9c+990となる。9-106-ctlla) 整数だから。 l S 4 右の図のおうぎ形で, 半径を1,弧の長さをl, 面積をSとすると, S=1/2r が成り立つことを,次のように説明した。 ①〜⑤にあてはま る式を書け。 9 [説明] SX130 (1)より, S=rx(πrx③ a ..(1) l=2x×② 360 ...(2) a ),(2)より、1/2=1485 l 2人より、S=1/2lr したがって, S=rx⑤ l 2 ||レベル2|| A πrx9 300 80 学 学園 6 5 右の図の陸上競技のトラックは,各コースの幅は1m, 「いちばん内側が半径rmの半円とlmの線分でできてい る。 内側から1コース, 2コースとし、選手は各コース のいちばん内側を走るものとする。 トラックを1周する 競技をするとき、 2コースのスタート位置は, 1コース のスタート位置より何m前にすればよいか。 ゴール rm lm

第2パラグラフめの、和訳で言う、医薬品認可機関のところらへんについて質問です 。ここの英文を見ると as drug approval~ のas って何用法なんでしょうか？

テーマ 専門性★★★ *. 24 ヘルシンキ宣言 英文 ①②つなぎ方 demands that the physician use every means possible to cure the 1 The ultimate ethical standard among the medical profession - but does this apply in a clinical trial, which is patient's illness understood to be experimental, not treatment? In a clinical trial, tension exists at the beginning between gaining knowledge that can be used in the longer term to benefit the public health, and the basic right of the patient to receive treatment. 112 For the scientific profession, the ultimate standard is to produce results that withstand scrutiny. For physicians and researchers, the 'gold 10 standard' in testing new drugs is a placebo-controlled study* in which some of the patients receive no treatment at all. These standards present an ethical dilemma as drug-approval agencies tend to lean toward the need for clear scientific data, which is best gained when a drug is tested against a control, or placebo. Furthermore, it becomes harder to 15 convince patients in First World countries to participate in drug trials when there may be a 30-50% chance of receiving only a sugar pill instead of a helpful medicine. 13 As