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Mathematics Junior High

青線部の5秒後っというのは、どうやって求めたのですか?

B Pを P, を 表 7 4章 関数y=ax² 6章 円 5章 相似な図形 7章 三平方の定理 8章 標本調査 2章 平方根 3章 2次方程式 秒後 ここで定着 右の図のような直 角三角形ABCで、点P は,Aを出発して毎秒 15cm 2cmの速さで辺AB 上をBまで動く。 また. 点Qは点Pと同時に Aを出発して毎秒 3cmの速さで辺AC上をCまで動く。点P, Qが出発してからェ秒後の△APQの面積を ycm² として,次の問いに答えなさい。 (1) AP, AQ それぞれの長さを、xを使って表 しなさい。 1 Q A P→ 点Pは,Aを出発して毎秒2cmの速さで動くから、 秒後のAPの長さは、AP=2×ェ=2x(cm) 点Qは,Aを出発して毎秒3cmの速さで動くから, 秒後のAQの長さは, AQ=3×x=3x(cm) AP 2x cm ($1x=3 (8 -10cm (2)yをxの式で表しなさい。 (△APQの面積) 1 =1/2×(辺APの長さ)×(辺AQの長さ)だから, y=-1⁄2×2x×3x y=3x² IC ROM: (3) x=2のときのyの値を求めなさい。 y=3x² にx=2を代入すると, y=3×22=12 28 y=3x² は 0≦x≦5では, x=0のとき, 最小値0 x=5のとき, 最大値75 B AQ 3.x cm 答y=3x2 答 + プラス (4) △APQの面積が27cm²になるのは,点P, Qが出発してから何秒後かを求めなさい。 y=3x² にy=27を代入すると, 27=3x2 x2=9 x=±3 x>0だから、 y=12 0≦x≦5 2章 平方根 3章 2次方程式 JUŠARSREO SAOA (8) 4章 関数y=ax (5) xとyの変域をそれぞれ求めなさい。AOA 点PはBに,点QはCに5秒後に着くから、 0≤x≤5 SHANT 3秒後0△ 5章 相似な図形 y 0≤y≤75 6章 円 7章 三平方の定理 8章 本 3 年 77

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English Junior High

英検2級 2022年 第二回リスニング だれか点のところ分かる人いませんか?

ウンロード Question: What does the woman want to buy? 2022年度 第2回 一次試験リスニング ★: Well, we have many different colors and sizes. What are you looking for? Actually, a really big one would be great. He likes to hug one. ★: We should have some that are as big as large pillows. Let me check if we have what you're looking for. No.8: My plant looks a little yellow. Do you think I used the wrong kind of soil? The soil looks too wet to me. How often have you been watering it? Don't water it too much. Leaves can turn yellow when a plant gets too much water. Question: What does the woman suggest doing about the plant? ★ Every two days. I recently put it in a bigger pot and moved it . too. No. 9 James, did you buy the meat for the barbecue? ★ Oh, no. I forgot! I'll get it tomorrow on my way home from work. ☆ ★ OK. Please don't forget. Everybody is coming at six. call me at work tomorrow Can you :? You know how bad my memory is. Question: What did James forget to do? No. 10: Welcome to Jessie's Comic Books. How can I help you? ★ I'd like to buy some old copies of a comic I used to read when I was a kid. It's called Wild Cowboys. 16 2022年度 第2回 一次試験リスニング Oh, that comic book when I was young, too. Unfortunately, you'll have trouble finding it at most stores. You should look for used copies online. ★ OK. I'll try that. Question: How will the man try to find a copy of the comic book Wild Cowboys? No. 11 Honey, you were running for longer than usual. What took you so long? Well, I was running on Forest Avenue when I saw a big, brown dog. It didn't look very friendly. ★: Did it try to bite you? No, but it was scary. I turned around and went the other way for a while. I a longer way home, just in case. Question: What do we learn about the woman? No. 12: Hello? ★ Hi, Liz. It's John. Can I talk to you about your boyfriend? Sure. What is it? ★ You know I'm doing a history report with him, right? Well,. . . I'm doing all the work. I see. Well, he's not lazy, but he's the kind of person that waits to be told what to do. I'll try talking to him for you. Question: What is one thing the girl says about her boyfriend? No. 13 No! The other team scored again. That's the second time this inning. 17

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