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数学 高校生

写真とても見にくくてすみません。 下半分が解説になっているんですけども、 なぜ、(2)の最後の方に4+3・4・2=28という計算をしているのでしょうか。また、1番最後の式の -28は29に対してなのか、それとも(40+4)に対してなのか教えてください🙏どなたかどうかよろしく... 続きを読む

15:57 69% 合 h ss-drl.I-cloud.jp/DrillIClier 1期>第1講>復習>定着度チェックチャレンジ問題 類題2 KY 袋の中に1と書かれた球が3個,2と害かれた球が4個,3と書かれた球が2個の合計9個の こいる。この袋の中から無作為に3個の球を取り出す。 1) 3個の球に書かれた数字の和が3の倍数となる確率を求めよ。 0/100 2) 3個の球に書かれた数字の和が3の倍数または偶数となる確率を求めよ。 搭欄 1) 2) 球をすべて区別すると,3個の球の取り出し方は全部で 9C=84(通り) うる。 1) 3個の球に書かれた数字の和が3の倍数となる組合せは (b) 2,2,2 である。 球の区別を考えると(a).(b)はそれぞれ,1通り,Cュ=4(通り)あり,(c)は3·4. から,数字の和が3の倍数となる場合の数は 1+4+3·4.2=29. したがって、求める確率は、 29 84° 2) 3個の球に書かれた数字の和が偶数となる偶奇の組合せは (i) 奇数が2個,偶数が1個。 (i) 偶数が3個 である。 球の区別を考えると、 (i)は、奇数が書かれた5個の球から2個,2と書かれた4個の球から1個取り出す場合 SC2× 4=40(通り)。 (i)は、2と書かれた4個の球から3個取り出す場合であり, 4C3=4(通り). また、(1)の(a),(b),(c)のうち,和が偶数となるのは(b),(c)の 4+3·4.2=28(通り). 以上より,求める確率は, 29+(40+4) -28 _15 84 28 前へ リトライ 終了 次へ の

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英語 中学生

至急お願いします 解けるところだけでいいので教えてください

5 次の英文を読んで, 1, 2, 3, 4の問いに答えなさい。 o niw ninuh dond ni o ood t o What can we use to make *buildings? Some people will use *wood, and other people will use oh t *cement. Do you know we can use paper to make a building? In 1994, many people in *Africa *lost their houses in a *war. They started *cutting down trees to build their houses. A lot of trees were lost. A team from *the United Nations gave them *aluminum *tubes for their houses, but the people didn't use them. They *knew that aluminum tubes were expensive, so they *sold them. Then the team gave them paper tubes. The people in Africa started using paper tubes for their houses. They didn't sell them because paper tubes were not expensive. A Tmas bot undestand h Paper tubes are not expensive, and they are very strong, We can make and get them easily. They are B so we can *carry them easily. When we make a building with paper tubes, we don't need many *tools. These are good points of using paper tubes for buildings. There is another good point. When buildings are *dismantled, there is so much *waste. It is not used again, but paper tubes can be used again. There was a *church in Kobe. It was *destroyed by an earthquake in January, 1995. Eight months later, a new church was built. It *was made of a lot of paper tubes. Many people loved the.church. Ten years later, the church was dismantled and *moved to a city in *Taiwan. We can see the church there still now. nrld. Sho [注) *building(s) =D建物 *cement =セメント Africa =アフリカ *cut(ting) down=切り倒す *tube(s) =筒 *wood =木材 lose(失う)の過去形,過去分詞 *the United Nations =国際連合 *lost = *war =戦争 o1od *aluminum =アルミニウム *knew = know の過去形 *sold = sell(売る)の過去形 *carry =運ぶ *tool(s) =道具 *dismantle(d) =解体する *waste =ごみ *church =教会 *destroy(ed) =破壊する pet *be made of ~=~で作られる *move(d) =移動する *Taiwan =台湾 1 本文中の A に入るものとして,最も適切なものはどれか。 ア They stopped cutting down trees. イ They bought a lot of aluminum tubes. ウ They started using aluminum tubes. エ They started cutting down trees again. elish bonks Iwan hd moro dieult に入る語として,最も適切なものはどれか。 エ tall 2 本文中の B ア large d イ light わウ heavy 度も~しない Amer リカん 3 下線部の指す内容は何か。 具体的に日本語で書きなさい。 urpriscd know 4 本文の内容と一致するものはどれか。 ア People in Africa started cutting downalot of trees to sell them to other countries. イ People in Africa didn't use aluminum tubes for their houses because they were not expensive ウ We need many tools when we make a building with paper tubes. エ In 2005, the church in Kobe was dismantled and moved to Taiwan.

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英語 中学生

1〜4まで教えてください!

5| 次の英文を読んで、1,2, 3, 4の問いに答えなさい。 oraon 1omiw sainuh and ni o ood aot o d What can we use to make *buildings? Some people will use *wood, and other people will use *cement. Do you know we can use paper to make a building? In 1994, many people in *Africa *lost their houses in a *war, They started *cutting down trees to build their houses. A lot of trees were lost. A team from *the United Nations gave them *aluminum *tubes for their houses, but the people didn't use them. They *knew that aluminum tubes were expensive, so they *sold them. Then the team gave them paper tubes. The people in Africa started using paper tubes for their houses, They didn't sell them because paper tubes were not expensive. A okon may bot understand h Paper tubes are not expensive, and they are very strong, We can make and get them easily. They are B so we can *carry them easily. When we make a building with paper tubes, we don't need many *tools. These are good points of using paper tubes for buildings. There is another good point. When buildings are *dismantled, there is sO much *waste. It is not used again, but paper tubes can be used again. There was a *church in Kobe. It was *destroyed by an earthquake in January, 1995. Eight months later, a new church was built. It *was made of a lot of paper tubes. Many people loved the church. Ten years later, the church was dismantled and *moved to a city in *Taiwan. We can see the church there still now. Tnd Tnons [注) *building(s) =D建物 *wood =木材 *cement =セメント *Africa =アフリカ *lost = lose(失う)の過去形,過去分詞 *the United Nations =国際連合 *cut(ting) down =切り倒す *tube(s) =筒 *war =戦争 *aluminum =アルミニウム *sold = sell(売る)の過去形 *knew = know の過去形 *carry =運ぶ *tool(s) =道具 *dismantle(d) =解体する *waste =ごみ *church =教会 *destroy(ed) =破壊する *be made of ~=~で作られる *move(d) =移動する *Taiwan =台湾 1 本文中の に入るものとして, 最も適切なものはどれか。 A ア They stopped cutting down trees. イ They bought a lot of aluminum tubes. ウ They started using aluminum tubes. エ They started cutting down trees again. ah bonko Iwa to meult stoi に入る語として, 最も適切なものはどれか。 エ tall 2 本文中の B ア large イ light ウ heavy y not American アメ 3 下線部の指す内容は何か。 具体的に日本語で書きなさい。 Turprised oww kr 4 本文の内容と一致するものはどれか。 ア People in Africa started cutting downalot of trees to sell them to other countries. イ People in Africa didn't use aluminumtubes for their houses because they were not expensive. ウ We need many tools when we make a building with paper tubes. エ In 2005, the church in Kobe was dismantled and moved to Taiwan.

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英語 高校生

分からないので埋めてくれるとありがたいです😢

A「~でしょう」「~します [~するつもりです]」 0 Itll[It will] be sunny tomorrow. 2 II[I will] do the gardening. 未来を表す wil 明日はいい天気でしょう。 私は庭仕事をします。 POINT 「~でしょう」と未来の予測·自然の成り行きを表す場合や, 「~します」と意志を表す場合は will を用います。 Vwhen (~するときに),if(もし~ならば)などの後では, 未来のことでも現在形を使います. If it is sunny tomorrow, I will do the gardening. DRILL A〈>の語と必要に応じて will を使って, 未来を表す英文を完成させてみよう。 (1) My father ffty years old next year. <be> (2) This box is too heavy for me.- OK, I it. (carry) (3) Ken the match if he hard. くwin/ practice> B「~するつもりです」「~します[~する予定です]」 未来を表すその他の表現 私はお寺巡りをするつもりで 電車は明日の 10時に出発します。 明日は奈良に滞在します。 I'm going to visit some temples. ④ My train leaves at ten tomorrow. I'm staying in Nara tomorrow. POINT 前から計画していて「~するつもりだ」という場合は〈be going to ~>で表します。 また, 近い未 来の予定は現在形 (→④), 現在進行形 (→⑤) を使って表すことができます。 V現在形は近い未来の確実な予定を, 現在進行形は近い未来に計画された(個人的な)予定 や取り決めを表します。 DRILL B 日本語に合うように, ( )内に適切な「語を入れてみよう. (1) 将来は何をするつもりですか. )you( (2) コンサートは明日の3時に始まります。 What ( ) do in the future? The concert ( )at three tomorrow. (3) 私たちは今晩, カーターさんと食事をします。 We ( ) dinner with Mr. Carter this evening.

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