Giải giúp em phần a b ạ
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1. to win
2. to pay
3. going
4. talking
5. to help
6. playing
7. learning/ to learn
1 to win
2 to help
3 going
4 talking
5 to help
6 playing
7 learning
Bài 2:
b: Ta có: \(B=\dfrac{15-5\sqrt{x}}{x-5\sqrt{x}+6}+\dfrac{\sqrt{x}+3}{\sqrt{x}-2}\)
\(=\dfrac{-5\left(\sqrt{x}-3\right)}{\left(\sqrt{x}-3\right)\left(\sqrt{x}-2\right)}+\dfrac{\sqrt{x}+3}{\sqrt{x}-2}\)
\(=\dfrac{\sqrt{x}-2}{\sqrt{x}-2}=1\)
31B(Who her -> Whose)
32B(People lose -> People who lose)
33D(Read it -> Read)
34D (Ko có then)
35C(Know how -> Knows how)
Đây bn nhé:
Ta có a/3 = b/8= c/5. Áp dụng tính chất dãy tỉ số bằng nhau ta có:
2a+3b-c/2.3+3.8-5 = 2a+3b-c/6+24-5 = 50/25 = 2
=> a/3 = 2 => a=6
=> b/8 = 2 => b=16
=> c/5 = 2 => c=10
Nhìn ngắn vậy thôi chứ ko sai đâu bn
Chúc bn học tốt^^
\(\dfrac{a}{3}\) = \(\dfrac{b}{8}\) = \(\dfrac{c}{5}\) và 2a + 3b - c = 50
=> \(\dfrac{2a}{6}\) = \(\dfrac{3b}{24}\) = \(\dfrac{c}{5}\) và 2a + 3b - c = 50
Áp dụng tính chất dãy tỉ số bằng nhau ta có:
\(\dfrac{2a}{6}\) = \(\dfrac{3b}{24}\) = \(\dfrac{c}{5}\) = \(\dfrac{2a+3b-c}{6+24-5}\) = \(\dfrac{50}{25}\) = 2
Vậy:
\(\dfrac{2a}{6}=2\) => \(2a=2.6=12\) => \(a=12:2=6\)
\(\dfrac{3b}{24}=2\) => \(3b=2.24=48\) => \(b=48:3=16\)
\(\dfrac{c}{5}=2\) => \(c=2.5=10\)
Các tập hợp tạo thành được:
\(\left\{a;b;c\right\};\left\{a;b;d\right\};\left\{a;b;đ\right\};\left\{a;b;e\right\};\left\{a;b;\text{ê}\right\};\\ \left\{a;c;d\right\};\left\{a;c;đ\right\};\left\{a;c;e\right\};\left\{a;c;\text{ê}\right\};\left\{a;d;đ\right\};\\ \left\{a;d;e\right\};\left\{a;d;\text{ê}\right\};\left\{a;đ;e\right\};\left\{a;\text{đ};\text{ê}\right\};\left\{a;e;\text{ê}\right\}\)
Có thể tạo thành 15 tập hợp
He is widely regarded as the best man for the job.
The suspect could not account for the sand in his boots
sally came up with the best solution.
You need to make allowances for the fact that he hasn't spoken French for years.
It was inevitable that he would fail his exams.
1. A. celebrate B. together C. restaurant D. organize
2. A. pollution B. awareness C. disappear D. addition
3. A. apple B. butter C. mother D. advance
4. A. protection B. referee C. dictation D. increasing
5. A. carriage B. damage C. survive D. lightning
6. A. generosity B. occurrence C. priority D. memorial
1. A. celebrate B. together C. restaurant D. organize
2. A. pollution B. awareness C. disappear D. addition
3. A. apple B. butter C. mother D. advance
4. A. protection B. referee C. dictation D. increasing
5. A. carriage B. damage C. survive D. lightning
6. A. generosity B. occurrence C. priority D. memorial
a: =5,599=5,60
b: =10(0,432+3,413)=10x3,845=38,45=38,50