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Mathematics Senior High

赤かっこのところは理解出来ます。けれども、金額は同じと考えれても100円玉を50円玉2枚に分割することはできないから使い方が10通りになるのがわからないです……。どういうことなのでしょうか??

xg ( 26+8=14 (通り) (S) $35 の法則により 行く行き方の総数はに入る 18 (1) 50円硬貨は1枚, 10円硬貨は3枚であるから, 用いる硬貨の< 種類や枚数が異なるとき,支払える金額も異なる。 20100円硬貨の使い方は 0, 1,2,3,4,5枚 の6通り 350円硬貨の使い方は 0, 1枚 の2通り 10円硬貨の使い方は したがって、求める金額の種類は全部で 6×2×4-1 = 47 (通り) 以外の 0,1,2,3枚の4通り [別解] 50円硬貨1枚と10円硬貨3枚のうちの一部または全部を 使って支払える金額は 0, 10, 20, 30, 50, 60, 70, 80 P AITABARCA CS の8通り。そのおのおのに対して、100円硬貨5枚のうちの一く 100円硬貨の使い方は 一部または全部を使って支払う方法は6通りずつあるから、求め る金額の種類は全部で 0, 1,2,3,4,5枚 の6通り。 10×4-1=39 (通り) る恋 [別解] 50円硬貨3枚と10円硬貨3枚のうちの一部または全部を 使って支払える金額は 50円硬貨は2枚で100円, 10円硬貨は5枚で50円 になるが,どちらもその 枚数より少ない。 •T-R= [1 TS ■8×6-1=47 (通り) 100円硬貨3枚と50円硬 貨3枚を組み合わせると, (2) 50円硬貨2枚と100円硬貨1枚は同じ金額を表すから、100 円硬貨3枚を50円硬貨6枚と考えて, 50円硬貨9枚と10円硬 貨3枚で支払える金額を考える。 BOR HOT 50円きざみで50円から 50円硬貨の使い方は 0, 1,2,.‥ 8,9枚の10通り 450円まで支払うことが できるから 50円硬貨 9 分 10円硬貨の使い方は 0 1,2,3枚の4通り 枚と考えることができる。 したがって, 求める金額の種類は全部で 0, 10, 20, 30, 50, 60, 70, 80, 100, 110, 120, 130, 150, 160,170, 180 円 すべての硬貨が0枚にな るとき, すなわち金額が 0円になる場合を除く。 B ®の金額は、Aの金額にそれぞれ100円を加えたものである。 ④ の8通りの金額に対して, 100円硬貨 (3+1) 枚のうちの一部 または全部を使って支払う方法は5通りずつあるから、求める 金額の種類は全部で 8×5-1=39 (通り) 50円硬貨2枚を100 円硬 貨1枚分と見なして 100 円硬貨 (3+1)枚と考える。

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English Senior High

Reading Advantages3 です。 穴埋めが分からないので教えてください。

ble? a. president b. cleaner B. Complete the paragraph with items from the box. Two items are extra. actually commented expected made the headlines media neighboring potentially riddle significant spectacularly visible worship shapes (3) in the local (4) "This stone is for people who celebrate with fire." Archaeologists in England thought they had made an amazing discovery in July 2003, when tourists on a beach found ancient carvings on a large block of stone. The archaeologists believed that the discovery of the stone, which had been imported from Norway in the 1980s and used to make a wall, was (1). The carvings of two snakes, a dragon, and other Experts translated the stone to say, very (2) However, two months later, the archaeologists were surprised when the (5) of the carvings was solved by a fifty-year-old local builder, Barry Luxton. The man, who had seen a photograph in a newspaper, told them that he was (6) the one who had made the shapes - in 1995! Luxton said that over a period of three days he had made the carvings for a celebration on a (7) beach that was going to be held by a group of druids people who nature. However, the block did not end up being moved to the other beach and (8) was eventually covered by sand. Recent bad weather blew the sand away, making the carvings (9) again. Luxton was surprised; he really never (10) that his work would become so famous. Review 1 - 5 25

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Mathematics Senior High

赤く丸をしたbの問題で解答の方に二階微分した後の式がなぜ(-1/4)(-1/4)(H-27)になるのか分かりません。教えてください🙇‍♀️

QA At time t = 0, a boiled potato is taken from a pot on a stove and left to cool in a kitchen. The internal temperature of the potato is 91 degrees Celsius (°C) at time t = 0, and the internal temperature of the potato is greater than 27°C for all times t > 0. The internal temperature of the potato at time t minutes can be modeled by the function H that satisfies the differential equation dH (H- (H-27), where H(t) is dt measured in degrees Celsius and H(0) = 91. (a) Write an equation for the line tangent to the graph of Hat t = 0. Use this equation to approximate the internal temperature of the potato at time t = 3. (b) Use 2017 APⓇ CALCULUS AB FREE-RESPONSE QUESTIONS (a) dH d²H dt² to determine whether your answer in part (a) is an underestimate or an overestimate of the internal temperature of the potato at time t = 3. (c) For t < 10, an alternate model for the internal temperature of the potato at time 7 minutes is the function -= − (G - 27)²/3, where G(t) is measured in degrees Celsius dG G that satisfies the differential equation dt and G(0) = 91. Find an expression for G(t). Based on this model, what is the internal temperature of the potato at time t = 3 ? 564 at (21-27) - == 2-16 To = - = (H(3)-27) 4 -64 = HB)-27 -37 = H (3) (b) _d²fi © 2017 The College Board. Visit the College Board on the Web: www.collegeboard.org. GO ON TO THE NEXT P

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