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数学 中学生

計算全て教えて下さいお願いします解説してくださいお願いします🥺^_^

-回の間題に対する解答用紙への記入上の留意点 答えが数または式の場合は、 最も簡単な数または式にすること。 答えに根号を使う場合は, の中を最も小さい整数にすること。 答えに円周率を使う場合は, 元 で表すこと。 1 次の(1)~(9)に答えよ。 gて1 2 6 (1) 11+2×(-7)を計算せよ。 (2) 2(3a+4b)-(2α-b)を計算せよ。 9 12 16 6 (3) -/96 を計算せよ。 216 (4) 1次方程式 2ェ+8=5ェー13 を解け。 (5) 2次方程式x(x+6)3D3ェ+10を解け。 (6)右の図に示す三角柱ABCDEFにおいて, 辺DEと ねじれの位置にある辺は全部で何本あるか答えよ。 B 30 566 4 (7)/1から6までの目が出る2つのさいころA, Bを同時に投げるとき, 出る目の数の 積が9の倍数になる確率を求めよ。 ただし、さいころはどの目が出ることも同様に確からしいとする。 60D (8) M中学校の全校生徒560人の中から無作為に抽出した40人に対してアンケートを 行ったところ、地域でボランティア活動に参加したことがある生徒は25人であった。 にう24t M中学校の全校生徒のうち, 地域でボランティア活動に参加したことがある生徒の 人数はおよそ何人と推定できるか答えよ。 およそ350人 22400 50:ス26 25 506 (9) 次のアーエの数量の関係のうち、 yがェの2乗に比例するものを1つ選び, 記号で 答えよ。また, その関係について, りをェの式で表せ。 ア 半径がxcmの円の周の長さをycmとする。 イ 周の長さが8cmの長方形の縦の長さをxca、横の長さをycmとする。 ウ 商積が12cm?の三角形の底辺の長さをェem, 高さをv emとする。 エ 底面の1辺の長さがrcm, 高さが6cmの正四角すいの体積をycm' とする。 ンつルナ8 エ )

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英語 中学生

これの5の答えはイだったんですけどなんでそうなるのか解説をお願いします。

次の左利き(left-handed)と右利き (right-handed) についての英文を読んで, 1~5の問いに答え なさい。 =~する可能性が高い rate (s) =割合 serious injuries =重傷 (注)life span (s) 3D寿命 feel down = 落ち込む be likely to ~= data = データ allergies = アレルギー advantage = 有利な点 academic success = 学問的な成功 president (s) =大統領 Are you left-handed or right-handed? Do you use your right hand or left hand when you do some activities? In this world, some people usually use their right hand, and others use their left hand. Is there any difference between these people? Some scientists) have discovered an interesting fact, about the life span of left-handed people and right-handed people. They. say that left-handed people have a shorter life span than right-handed people. This idea comes from Da study in 1991 It showed that the population of left-handed people becomes smaller with age. The scientists said that left-handed people live in ② a world for right handed people. Some things, such as a knife, a guitar, a baseball glove, and a keyboardof personal Computers, are made for right-handed people. Left-handed people are more likely to have trouble using those things, and have-accidents and serious injuries.. In 1992, one scientist, that the life spans of left-handed people are about nine years shorter than those of right-handed people. Were left-handed people given a bad hand? If you are a left-handed person, don't feel down. In 2000, a scientist showed that ④ Coren's idea was not. true. Here is the reason: some elderly right-handed people started as left-handed people, but their parents and teachers changed them into right-handed when they were children. That means many of left-handed people died as right-handed. Like this, there are some questions about Coren's data, so we cannot say that left-handed people have a shorter life span. Also, other studies showed that the life spans of right-handed people and left-handed people are not so different. Stanley Coren, said that these make their life spans shorter. He found Still, some people say that there are some bad points in being left-handed. Because they live in a world for right-handed people, left-handed people may have higher rates of some diseases such as mental disease,and allergies. However, we can also find a lot of good points in being left-handed. They have an advantage in sports like_tennis and baseball. Also, they are likely to have more academic success and higher IQs. Five of America's last eleven presidents were left-handed people, though ( 6 11人の5人

未解決 回答数: 1