3÷20＝0.15なのになぜ150になるかが分かりません🥲どなたか教えてください🙇🏻‍♀️💦

5m 4m 300kg 床 20 30 20 100 面を垂直に押す力は [3]N 力がはたらく面積は 4m×5m = 圧力= (7) ⑥ [ 20 ] 3 ]N [20]mi m² =[150]Pa

青チャート数Bの統計の分野です。 P(k)までは合ってるっぽいんですけど、以降の計算でΣ[k=1,n-2]kP(k)を、P(n-1)とP(n)は0だと思ったのでΣ[k=1,n]kP(k)にして計算したら間違ってました。おそらく何か勘違いしてるので、どなたか説明してくれませんか。

(2) E(X)-kp-kn(n-1) n(n-1) (nk-k²) = n(n=1) {n • \/ \n (n+1)= | | (n+1)(2n+1)} 2 = n(n-1) = n(n+1)(3n-(2n+1)) n+1 6 3(n-1)(n-1)=n+1 3 また E(X)=R²-k²- 2(n-k) n(n-1) n(n-1) (nΣk²-k³) 2 72° また、に関係しない の式を 前に出す。 =(n+1) -n(n+1)(2n+1) =(-1) { //1n(n+1)(2n+1)-1/13r(n+1)} = 1/2(+1) n(n+1) 6 よって_V(X)=E(X*)-{E(X)n(n+1)_(n+1) (n+1)(n-2) 18 本 (nは3以上の整数) のくじの中に当たりくじとはずれくじがあり、そのうちの ② 66 2本がはずれくじである。このくじを1本ずつ引いていき、2本目のはずれくじを 引いたとき、それまでの当たりくじの本数をXとする。 Xの期待値E(X)と分散 V (X) を求めよ。 ただし, 引いたくじはもとに戻さないものとする。 [類 新潟大 p.519 EX 39.40 出るこ るときであるか [2]Zのとりうる よって、(1)から 二項定理により ゆえに、 Zn個の確率 副題の(2)は,次 knに対し X. 2 Xs........ EC 2以上の自 勝った人の数 (1) ちょうど (2)Xの期待 X-Omer P(x+c) = t h PD U ( n n y ) Ci me Pry=2)= (+ 1-2 A-3) 3 (+ P ht (n-2) -3 n-14 h (例2 (Pf) (=(n-2)/(h= h-1-k (h)! n(h+1) \^<2)! (^^-*) W (m-k)? (+) Ex)=l=k-1 2k+1) =h(n-1) ht 573072. pm. Proof={ \+) (2011) + {ach+i)} = +11 + (2n++ b + 4) h-1 2(n+1)(nt) == n-1. 3(h-1)

画像の問題の(2)について質問です。 時差は計算したら13時間になったのですが、そこからどうやって求めれば良いのでしょうか？ 答えは2月13日午後10時と書いてます。 解説よろしくお願いします🙇‍♀️

まと 3 次の地図は、東京からの距離と方位が正しく表されたものです。 この略 地図について, あとの各問いに答えなさい。 なお, 略地図中の経線は本初子 午線から20度ごとに, 緯線は赤道から20度ごとに引いてあります。 □(1) 日本の領域の端となって 略地図 < 2014 神奈川・改> いる略地図のAの島とBの 島の名称を,次のア~エか らそれぞれ1つずつ選びな さい。 ア. 与那国島 イ. 沖ノ鳥島 ウ. 択捉島 I. MAA □(2) 略地図の地点Cに関し て, 日本時間が2月14日 午前11時のときの地点C の日時を、午前もしくは午 東京 AB 後という語句を必ず用いて書きなさい。 なお,地点Cの標準時の基準とな る経度は,地点Cが位置する経度と同じものとします。

この問題を教えてください。

1. (A) Since he speaks so rapidly, I can't follow him. (B) If he more slowly, I him. 2. (A) I used my calculator, so I did not take much longer. (B) If I my calculator, I much longer. 3. (A) If I hadn't been tired last night, I would have gone out. (B) I out because I last night.

2番の問題です。 隣り合わない場合を求めるためにノートの画像のように考えたのですが、ノートの考え方がなぜ違うのかわかりません。 Dの両端2箇所以外なら、Aをどこに何個入れようと自由なのではないかと考えたのですが、違うのでしょうか

65. <辞書式に並べる順列> 7つの文字A,A, A, D, I, M, Y すべてを1列に並べてできる文字列について,次の 問いに答えよ。 (1) 文字列は全部で何通りあるか求めよ。 (2) AとDが隣り合う文字列は全部で何通りあるか求めよ。 (3) 2つ以上のAが隣り合う文字列は全部で何通りあるか求めよ。 複雑なげ 近から考える 4 全部の文字列をアルファベット順の辞書式に並べるとき, 文字列 YAMADAI は何 番目の文字列か求めよ。 I [23 山口大〕

この問題を教えてください。

総合問題 B 次の文の 内に入るもっとも適切な語を以下の語群から1つ選び、文を完成させなさい。 どの語も1度しか使用できません。また,必要ならば形を変えること。 (1) You've been very kind to me, and I just don't know how ( ) you. (2) The streets are wet; it must ( ) last night. (3) Her advisor was pleased with the topic she (___) for her report. (4) The man went to bed without ( (5) The president had her secretary ( (6) I won't stop screaming until you ( (7) I love sushi. I wish I ( ) the dishes. ) the mistakes in the report. ) me go. more at the party last night. (8) As a child, I ( ) many times not to interrupt while someone else was speaking. choose correct eat let rain tell thank wash 〔語群〕

わかる方お願いします🙇🏻💦💦💦 矢印から下の部分を訳して、T/F教えてください🙇🏻🙇🏻🙇🏻 Fは間違えている箇所を訂正お願いします🙇🏻🙇🏻💦💦

15 [1-58] Caleb Autry: I originally wanted to be an engineer, but I realized quickly that it 3( passion for music and I was just scared to pursue it. 35 minismic tuods onilaat ho teiled o ). I knew I had a Ruffini: That changed last February, when his math and science- 20 focused High School, A NEW BEAT MORNING PHILADELPHIA TEENAGERS PRODUCE MUSIC WITH OWN RECORD LABEL George Washington Carver, became the test site for the Philadelphia School District's new music production www.program.obule belesuper test site 実験校 bobmemoby 64 50 Bo R 40

(2)①studying (5)③regards (8)①came to realize (12)②to whom という答えになるのですが、どうしてそうなるか、なぜほかの回答がだめなのか解説お願いします！

1 空所に入る適語を選びなさい。 (1) Jennifer ( ) her own work experience in India. Dspoke for ②told ③talked about ④said ) abroad next year. studying in to study 4to study in (2) It might be wise of you to avoid ( Dstudying (3) He made an effort to become a professional golfer, but he made ( ) progress. ⑪little 2a little ③few ④a few (4) It seemed ( ) for us to finish the task by the next day. Dincapable ②unable (5) Don't forget to give my best ( Dreward @regar regard ③impossible terrible ) to your parents when you go back home. ③regards (6) I( ) money from my friend last week. Dlent ②sent ③rented (7) I was so tired that it was really hard to stay ( ⑪wake ②awake ③woken Drewarding borrowed ) in class. ④waking ((8) After a cup of coffee, I ( ) what his message really meant. Dcame to realize came realizing ④became to realize 3became realizing (9) Mary quarreled with her father a week ago. She is now barely ( ) with him. Don bad conditions Bin familiar relation ②on speaking terms on good feelings ) the dishes after dinner. 4to wash (10) Because my mother was sick in bed, she had me ( wash ②washed ③have washed (11) Fleming's discovery of penicillin, for ( ) he was awarded the Nobel Prize, had a major influence on the lives of people in the 20th century. Dthat ②what ③which whom ) I introduced delicious yakitori. ④whom (12) I stayed one more week with my friends from Italy, ( Qwho ) involved in the accident is my neighbor. Dof whom ②to whom (13) One of the girls ( who was ②whoever were whose were (14) You have to do ( ) you have to do. what ②that ③which ④how ④whomever was

画像の問題教えて欲しいです🙇🏻‍♀️❕

下の語を適切な形で( 1. The boy ( にいれて、英文や会話を完成させましょう。 lil foodsa Depangal 2. "I'm sorry to have kept you ( ) the red T-shirt is John. Next to him is my brother Bob. boog andT ST ) so long." "Don't worry about it." 10 3. Three days later, the police found the ( However, they were unable to find the money in it. 4. The photo ( ) wallet at the second-hand shop. from the window upstairs was really beautiful. I hope I can live in such a house one day. I #33 viuselo stiup and ved steal / take / wait / wear 2 ( )内の語句を並べかえて、英文や会話を完成させましょう。 not Talonio いえ 1. We saw (her / the street / her car / across / parking). She must be here somewhere. 2. "Did you watch the baseball game yesterday?" "Yes. It (an/ was / game / exciting)." 3. "Don't you hear something?" "It is (falling/rain / on the / the roof)." 4. My father (valuable / his /watch/ stolen / had). He was really careless. OXER A 5. I (with them talking each other saw) for a long time. They seemed to have a serious argument. pol aid tud ad Hood erd 6. It was windy last night. We (all the windows/keep/to/ had / locked). qu notW.8

英検準2級eメールの英作文です🙇🏻‍♀️ 添削、アドバイスお願い致します🥲

Hi! I have something to tell you about. I went to a library with my friends yesterday. I wanted to study at home, but my friends suggested studying at a quiet place. So, we went to the library near the station. It was very beautiful, and there was a surprise. There was a café in the library. Do you think such cafés will become popular in the future? Your friend, Alex