giúp mik hết dc ko
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31 tháng 7 2021
Mỗi giờ mười công nhân sản xuất được:
150:3=50(sản phẩm)
Một giờ mỗi công nhân làm được:
50:10 =5(sản phẩm)
Trong 6 giờ mỗi công nhân làm được:
5×6=30 (sản phẩm)
Đáp số:30 sản phẩm
24 tháng 8 2021
a, Vì a vuông góc với AC
b vuông góc với AC=> a//b
b, ta có a//b-> B2=D1( so le trong )
-> B2=D1=45 độ
mà B2+B1=180(kề bù)-> B1=180-B2=180-45=135 độ
c, ko bt lm:)
GL
20 tháng 6 2023
1. Lan said she was working in Hanoi then
2. Binh said he needed a new bicycle
3. Mary said her English teacher was very humorous
4. My younger brother said he didn't want to stay at home then
5. Binh said Mr.Thanh could speak two languages well
6. Miss Hang said she would go on a picnic to Nha Trang the next day
7. Tom said he didn't know who she was
8. Mai told us that it was raining heavily outside
9. He said to his friend that he had to go home then
10. Hoa said she couldn't go out after 8 p.m
________
II
1. Lan asked Hoa if she could speak French well
2. I asked Mai if she was free that night
3. Nhi asked Mai if she liked listening to pop music
4. She asked me if she lived near there
5. A tourist asked me if I could tell her the way to the nearest post office
26 tháng 7 2018
10^100 + 23
= 1000...000 + 23
= 1000...023
=> A có tổng là 2 + 3 + 1 = 6 => ko chia hết
...sai đề...
9 tháng 11 2021
Gọi đa thức dư là \(ax^2+bx+c\) (do số chia bậc 3 nên thương bậc 2 trở xuống)
\(\Leftrightarrow P\left(x\right)=\left(x-1\right)\left(x-2\right)\left(x-3\right)\cdot c\left(x\right)+ax^2+bx+c\\ \Leftrightarrow\left\{{}\begin{matrix}P\left(1\right)=a+b+c=2\\P\left(2\right)=4a+2b+c=3\\P\left(3\right)=9a+3b+c=5\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}a=\dfrac{1}{2}\\b=-\dfrac{1}{2}\\c=2\end{matrix}\right.\)
Vậy đa thức cần tìm là \(\dfrac{1}{2}x^2-\dfrac{1}{2}x+2\)
12 tháng 7 2023
1: \(=\dfrac{4\left(x-1\right)}{\left(x+1\right)^2}\cdot\dfrac{3\left(x+1\right)}{-20\left(x-1\right)}=\dfrac{-12}{20}\cdot\dfrac{1}{x+1}=\dfrac{-3}{5x+5}\)
2: \(=\dfrac{x^2-xy+y^2}{\left(x-y\right)\left(x+y\right)}\cdot\dfrac{\left(x-y\right)^2}{\left(x+y\right)\left(x^2-xy+y^2\right)}\)
\(=\dfrac{x-y}{\left(x+y\right)^2}\)
3: \(=\dfrac{1-4x^2-1}{1-2x}:\dfrac{4x^2-2x-4x^2}{2x-1}\)
\(=\dfrac{4x^2}{2x-1}\cdot\dfrac{2x-1}{-2x}\)
=-2x
GL
16 tháng 6 2023
1. I'd rather you didn't ask me that question
2. I haven't seen Bob seen I was in HCM City
3. He would rather read books than watch TV
4. It took Peter three hours to repaint his house
5. He asked me if I knew to speak English
6. We haven't met each other for ten years
7. The film was so boring that she fell asleep
8. The furniture was too expensive for me to buy
9. The weather is so good that they are going for a picnic
10. The coffee is too hot for me to drink
B
16 tháng 6 2023
20 strong enough to carry that heavy box.
21 isn't hot enough to boil the kettle.
22 wasn't warm enough for us to go swimming.
23 swims skillfully.
24 a very good English learner.
25 swims well.
26 a very fast runner.
27 more interesting than plays.
28 more difficult than English.
29 as intelligent as Jill is
30 to have a friend like you
31 to smoke 20 cigarettes a day, but now he doesn't smoke any more.
32 enough to lift that heavy table.
14 d mình nghĩ thế
Đúng phải là B nha bạn