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英語 高校生

答え合わせがしたいので教えてください

「I|次の文を読んで、あとの問いに答えなさい。( wのついた語は文末に注があります。 ns Sitting in the consultation room of a charming cosmetic surgery clinic in Washmgo. D.C., Hudson Young removed his mask under the satisfied gaze of his doctor. Like a grownns number of Americans, Young decided the right time to undergo plastic surgery was middle of a coronavirus pandemic, He knew he would have time to recover in the privacy ot his own home. The main reason, however, was that Young suddenly found himself face to face with his own image while participating in an increasing number of videophone and web A 「Its something new when you have to stare at your face for a couple of hours a day and there's only so much you can do with good lighting and good angles," Young said. The 52-year-old real estate agent had allready been a fan of cosmetic surgery. He had face lift, eyelid surgery and laser resurfacing for the first time in October. "When you see yourself on Zoom, you are shocked," he explained, as Dr. Michael Somenek examined his w barely visible scars. Young is far from the only one who has found himself disappointed with the reflection he has seen in the screen over the past year. Virtual consultations for cosmetic procedures have risen 64% in the United States since the beginning of the COVID-19 pandemic, according to the American Society of Plastic Surgeons. “We have seen an increase in the number of surgical cosmetic procedures that are directly related to Zoom," said Somenek, who has seen a 50% to 60% increase in customers. “I think the pandemic B has given everyone time to take care of those things that we've been putting off until later," explained Ana Caceres, who was able to work from home after C a plastic surgery operation she had wanted for a long time. She recovered at. her parents' house outside Washington after a December cosmetic surgery that helped her D deal with a source of insecurity she had had since adolescence. "I didn't have to days off, because I was still able to work from my bed with my lap-top," the 25-year-old said. “When life is going on and you have places to be, it's s0 easy to put things off," Caceres said, showing off a dress she says she now has the confidence to wear. And she has scheduled more cosmetic surgery. Her surgeon, Dr. Catherine Hannan, says consultations at her clinic in the IIS comit1 E have nearly doubled since the beginning of the pandemic. "Our patients have more lines because the last vear has been so hard. A face or boay change can have a psychological

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数学 高校生

(2)の8+2+xになる理由を教えてください🙇‍♀️ できれば(2)の解説お願いします

よって,9B+45 の一の位の数をxとすると, 8+2+x (2))ある2桁の自然数Bを9倍して 45を足すと,百の位が8,十の位が2 よって, 10+x=18 すなわち x=8 となり 9B+45=828 基本例題99倍数の判定法 5いるも2 8OOOOの 1)日の位の数が2である3桁行の自然数 Aがある。Aが5の倍数であり, 3の倍数であるとき, Aを求めよ。 であるとき,Bを求めよ。 ID.388 基本事項2 甘 CHARTO S 倍数の判定法の利用 5の倍数 → 一の位の数が0または5 3の倍数 → 各位の数の和が3の倍数 9の倍数 OLUTION 各位の数の和が9の倍数 (2) 計算して出てきた数をCとおくと,Cは3桁の自然数であることを確認する。 Cの一の位の数をxとすると、条件から8+2+xは9の倍数。 い (解答) (1) Aの十の位, 一の位の数をそれぞれx, yとすると Aが5の倍数であるから ソ=0 またはy=5 Aが3の倍数であるから, 2+x+yは3の倍数である。 y=0 のときx=1, 4, 7 y=5 のとき x=2, 5, 8 よって -0SxS9 であるから 2<2+x<11, 7S7+x<16 したがって A=210, 240, 270, 225, 255, 285 10SB<99 このうち,3の倍数であ (2) Bは2桁の自然数であるから るのは よって 9·10+45S9B+45<9·99+45 2+x=3, 6, 9 すなわち 135<9B+45<936 ラに 9B+45 は3桁の自然数であり,9B+45=9(B+5) + D夏7+x=9, 12, 15 であるから9の倍数である。 すなわち10+xは9の倍数である。 更に,0Sx<9 であるから 10S10+x<19 458 1d3S-12- B=(828-45)-9=87 10以上19以下で9の倍 したがって 数は 18のみ。 ImCE… 992

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