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Darina [25.2K]
2 years ago
9

Tại Trường Tiểu học ABC, số học sinh của Khối lớp 1, Khối lớp 2, Khối lớp 3, Khối lớp 4 và Khối lớp 5 chiếm tỉ lệ lần lượt là 28

%; 22%; 20%; 16% và 14% tổng số học sinh toàn trường. Trong mỗi Khối, tỉ lệ học sinh giỏi năm nay của Khối lớp 1 là 45%, Khối lớp 2 là 50%, Khối lớp 3 là 55%, Khối lớp 4 là 65% và Khối lớp 5 là 75%. Xét trong Khối lớp 1, tỉ lệ học sinh giỏi của Khối lớp 1 là bao nhiêu?
Mathematics
1 answer:
-Dominant- [34]2 years ago
6 0

Answer:

hello bro

Step-by-step explanation:

can you translate it on english so i can help you

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Answer:

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Step-by-step explanation:

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Which value must be added to the expression x2 + 12x to make it a perfect-square trinomial?
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36 is must be added to the expression x² + 12x to make it

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Step-by-step explanation:

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2. The middle term in the trinomial is the product of 1st , 2nd

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3. The 3rd term in the trinomial is square the 2nd term in the bracket

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Learn more:

You can learn more about perfect-square trinomial in brainly.com/question/7932185

#LearnwithBrainly

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