a,Tìm hoành độ giao điểm của đồ thị hàm số y=\(\dfrac{1}{2}+1\) với trục Ox

b,Tìm tung độ giao điểm của đồ thị hàm số y=\(\dfrac{3}{2}x-2\) với trục Oy

Cho△ABC vuông tại A,đường cao AH.Từ M là điểm bất kì trên cạnh BC kẻ MD⊥AB,ME⊥AC.Chứng minh 5 điểm A,D,M,H,E cùng nằm trên 1 đường tròn

So sánh

\(\sqrt{a}+\sqrt{7}\)  và \(\sqrt{a+2}\)  và \(\sqrt{a+5}\)

\(\left(\dfrac{a\sqrt{a}+b\sqrt{b}}{\sqrt{a}+\sqrt{b}}-\sqrt{ab}\right)\left(\dfrac{\sqrt{a}+\sqrt{b}}{a-b}\right)^2=1\)

CM đẳng thức

Tam giác ABC vuông tại A,AB=15cm.AH là đường cao,AH=12cm.

a,Tính góc BAH,Chu vi tam giác ABC

b,Kẻ HF vuông góc với AC.CMR:HC.BC=AF.AC

c,Tứ giác AFHB là hình gì?Tính diện tích tứ giác AFHB

\(\left(\dfrac{\sqrt{6}-\sqrt{2}}{1-\sqrt{3}}-\dfrac{5}{\sqrt{3}}\right)\):\(\dfrac{1}{\sqrt{5}-\sqrt{2}}\)

Choose the sentence that means the same as the given sentence.

Câu 1:  Scientists have discovered that there is water on Mars.

A. It have been discovered by scientists that there is water on Mars.

B. It has been discovered by scientists that there is water on Mars.

C. It is discovered by scientists that there is water on Mars.

D. It has discovered by scientists that there is water on Mars.

Câu 2:  This exhibition is much more interesting than the last one.

A. The last exhibition was not as interesting than this one.

B. The last exhibition was not as interesting than this exhibition.

C. The last exhibition was as interesting as this one.

D. The last exhibition was not as interesting as this one.

Câu 3:  “Have you ever tried calling a helpline?” the teacher asked Ngoc.

A. The teacher asked Ngoc if had she ever tried calling a helpline.

B. The teacher asked Ngoc whether she had ever tried calling a helpline.

C. The teacher asked Ngoc whether she has ever tried calling a helpline.

D. The teacher asked Ngoc she had ever tried calling a helpline.

Câu 4:  She was so unprofessional that she didn’t prepare for the presentation.

A. It was unprofessional of she didn’t prepare for the presentation.

B. It was unprofessional of her not to prepare for the presentation.

C. It was unprofessional of she not prepare for the presentation.

D. It was unprofessional of her not prepare for the presentation.

Choose the meaningful sentence that is best combined from the two given sentences.

Câu 1:  I love going to this place. It’s the noisiest place in the city.

A. Although  loving  going to this place, it’s the noisiest place in the city.

B. I love going to this place although being the noisiest place in the city.

C. I love going to this place although it’s the noisiest place in the city.

D. Although  I love going to this place, it’s the noisiest place in the city.

Câu 2:  Many children like to go to Bat Trang Ceramic village. They can make their own pottery there.

A. Many children like to go to Bat Trang Ceramic village. As they can make their own pottery there.

B. Many children like to go to Bat Trang Ceramic village as they can make their own pottery there.

C. As many children like to go to Bat Trang Ceramic village. They can make their own pottery there.

D. As many children like to go to Bat Trang Ceramic village, they can make their own pottery there.

Câu 3:  We’ll have to phone you first. Then we’ll organise the trip.

A. Before we have to phone you first, we’ll organise the trip.

B. We’ll have to phone you first before we’ll organise the trip.

C. Before we’ll have to phone you first, we’ll organise the trip.

D. We’ll have to phone you first before we organise the trip.

giúp mk vs,mk cần gấp ạ

Choose the meaningful sentence that is rearranged from the given words.

Question 1: there/ like/ lots/ Viet Nam/ are/ craft/ of/ villages/ Bat Trang/ in.

A. There are lots of craft villages like Bat Trang in Viet Nam.

B. There are lots craft villages of Bat Trang in Viet Nam.

C. In Viet Nam like Bat Trang there are lots of craft villages.

D. There are  lots of  Bat Trang like craft villages in Viet Nam.

Question 2:   living together/ a/ is/ a family/ in which/ as/ parents/ family unit/ children/ and/ a nuclear family.

A. A nuclear family is a family parents and children which in living together as a family unit.

B. A nuclear family is a family parents and children living together which in as a family unit.

C. A nuclear family is a family which in parents and children live together as a family unit.

D. A nuclear family is a family in which parents and children live together as a family unit.

giúp  mk với

Choose the sentence that means the same as the given sentence.

Câu 1:  Scientists have discovered that there is water on Mars.

A. It have been discovered by scientists that there is water on Mars.

B. It has been discovered by scientists that there is water on Mars.

C. It is discovered by scientists that there is water on Mars.

D. It has discovered by scientists that there is water on Mars.

Câu 2:  This exhibition is much more interesting than the last one.

A. The last exhibition was not as interesting than this one.

B. The last exhibition was not as interesting than this exhibition.

C. The last exhibition was as interesting as this one.

D. The last exhibition was not as interesting as this one.

Câu 3:  “Have you ever tried calling a helpline?” the teacher asked Ngoc.

A. The teacher asked Ngoc if had she ever tried calling a helpline.

B. The teacher asked Ngoc whether she had ever tried calling a helpline.

C. The teacher asked Ngoc whether she has ever tried calling a helpline.

D. The teacher asked Ngoc she had ever tried calling a helpline.

Câu 4:  She was so unprofessional that she didn’t prepare for the presentation.

A. It was unprofessional of she didn’t prepare for the presentation.

B. It was unprofessional of her not to prepare for the presentation.

C. It was unprofessional of she not prepare for the presentation.

D. It was unprofessional of her not prepare for the presentation.