問2の四角で囲ってるとこがなぜこのような式になるのかがわかりません。

Ⅱ 次の問1~問3の空欄 (7) (月) 解答欄にマークせよ。 ただし、分数は既約分数で表せ。 (20点) 問1. Hは平面α上の点であるから, 3 がある。 3点A, B, C を通る平面をαとし,原点0からαに下ろした垂線の足をHとする。 点Oを原点とする座標空間内に、 3点A (2, 1, 1), B (0.31) C (2,-1,-1) Hの座標を以下の手順にしたがって求めよ。 に当てはまる整数を0~9から1つ選び、 該当する AH = sAB+tAC となる実数 s.tが存在する。このとき, ベクトル OH の成分を stで表すと OH = (7) t. (カ) (イ) S, + (エ) S- である。 問3. Hの座標は 問2. OH が AB, AC の両方と垂直であるから,s= (ス (セ) (ン) (チ) 一 (ク) (ケ) t= である。 (サ) (キ) 1 となる。

｢塩酸と反応したマグネシウムの質量は何mgか｣という問題なのですが解き方が分かりません。 教えてください！ ちなみに答えは240mgです。

いま、単体のマグネシウムに 2.00 mol/Lの塩酸 20.0mlを加えて完全に溶解した。 この反応 液に水20.0ml を加えた後 1.00 mol/Lの水酸化ナトリウム水溶液で滴定したところ、 中和点 ルデ までに20.0mLを要した。

お願いします、

( Crossword Puzzle Complete the puzzle and make a word. 001 下の英文が表す単語, あるいは に入る語を用いて クロスワードパズルを完成させ,その後,★のマスの アルファベット9文字を用いて,次の英文が表す単語 を作りなさい。 This animal has a long tail, big jaw and lives in [2] rivers and lakes. Their skin is used for bags or skil is used 101 nowshoes. Jo 12 bas ensmad wod \1) am to bohay gol 3 THES Dowans di 151 prb vino co 5 I 15 11 100,210 this. od 11 A part of a house that has walls and sli bay a floor. bas pror diod ni s13 This is the most common metal on earth. 15 "It's very cloudy. It is il toto soon." 15 10 Aplama L ★ bn hottest. 2 si ni Todo dons is dool egob ba her at the airport yesterday. ni 500 aroels Jud 7 People do this moving their body Daxil ved Ternays paisubnox while listening to music. rod nem 9 You can boil this fusic to gold A 2 19 metal on 12 To tra ★ nom sdi odio ross is name M E OF 13 6 7 E ★ E 12 sergs odi 20170 albbi[ACROSS ]da albbus" & ballo so edure [ DOWN] of guidismos sved of amese boold 10 A small shape of a rock. This is o 1 One of the four seasons, and the poved used to make concrete. alqm MOT 3 Water becomes this when it is very cold. ★ C /10 You write or draw on this collection of sheets of paper. an name of a small insect. T 14 4 This is the place where something invom to rain 14 The opposite of "far." Sha A ends. And bas swrangleid jest oT 0: A musical entertainment given in ni ripolyro lo introms bonin public by one or more performers. 6 8 An animal or bird you keep at home, gob Sp Hon such as a dog, cat, and rabbit. dogs to 10 The opposite of "out." form Close onships travel by airplane. This ada bavol ans. is also a his is also a bib ada

接続詞のthatはどこに省略されてますか？

Section 149 560 I( ) Peter lied about what he had seen because he is such an honest man. ① doubt ② imagine 3 suspect ④ think (学習院 Check 43 「疑う」 を表す動詞の使い分けを確認しよう! □ doubt + that 節 「･･･ではないと思う」 → 560 □ doubt + whether[if] 節 ｢･･･かどうか疑問に思う｣ I suspect + that 節 ｢(どうも)･･･らしいと思う」→561 <think + that節) とほぼ同意。

なぜ、Cuの生産量12.7g=0.2molなのかわからない

80M 14 bcg と表すとき, acに該当する数字を 5 下線部の操作後の亜鉛板の質量を a b それぞれマークせよ。 6 下線部の操作により導線に流れた電気を A

この回答で合ってますか？

意味がとおるように( 1. A: Ben is late. 3 B: (I/if/wonder ) he knows the way. )内の語句を並べかえて､ 対話をしてみましょう。 2 2. A: Peter says we have no school tomorrow. 4 2 3 B: (I/it/doubt / if ) is true. doubt [dáut] ~を疑う 3. A: The weather is going to be terrible this weekend. 2 4. 1. B: I don't know (will / our flight / whether / be canceled).

stayって自動詞他動詞どっちもありますか？

Section 023 56 fist Peter would rather stay home than ( ) to the movies. 1 having gone (3) gone 57 2 go 4 to go As it is raining, I would ( (1) better (3 like of on tuo 1 bluode 110 ) stay at home. 2 have 4 rather & t #300 S 16 7 Boton 380 #

1番と2番の訳がわかりません buzzingてなんですか、調べてもわかりません

2 誤っている箇所を,下線部 ①~④のうちから一つ選び,○で囲みなさい。 X1. His mind was always buzzing with new and excited ideas. Dit exciting shows a poor rabbit using for animal experiments. X 2. 1 The picture anti antino 2 ③ X 3. I saw her to come into the room @smiling. Come / Coming X 4. That woman talked to Roger is one of my friends from school. 3

somethingって単数扱いだからウじゃないんですか？ なぜアになるのですが？？

20. She felt something ( F20. on her back. 7. move 1. moved 7. moves 21. A: Does Peter play any musical instruments? 1. to be singing I. to move

教えて欲しいです🙏 よろしくお願いします。

【5】 次の対話の下線部 1)~6)の意味に最も近い語(句) をa~dから選びなさい。 JANE: Hello, Peter. How's your new job going? PETER : Hi, Jane. Oh, It's a breeze! I choose my own teaching hours, and the students are enthusiastic, too. It's so much better than my last job. JANE: That's great. So, do you have plenty of classes? PETER: Yes. And, 3)as luck would have it, I can teach subjects that I enjoy. JANE: Oh, really. Does the principal give you any trouble? PETER: No. But she did ask me to help with the science club after school. However, I 4)turned her down. JANE: Oh! Do you think that was a good idea? Shouldn't you keep on good terms with her? PETER: I didn't think of that. Do you think I should speak to her again? JANE: Well, I would if I were you. You want to make a good impression, don't you? PETER I certainly do! Thanks for your advice. I'll call her tomorrow. JANE Good idea. Let me know what happens. 1. a. very difficult c. not so easy a. better paid than c. a lot worse than 2. 3. 4. 5. 6. a. not by chance c. luckily a. refused her c. a. stay for the term with c. teach for the terms with couldn't decide a. do good deeds c. create a good image b. very easy d. a little windy b. not as bad as d. an improvement on b. unluckily d. happily b. asked her for time d. accepted b. stay friendly with d. stay away from b. have a good idea d. leave an impression