ta thấy:

\(\widehat{A_1}+\widehat{A_4}=180^o\)

⇒ \(\widehat{A_1}=180^o-130^o=50^o\)

ta có:

\(\widehat{A_1}=\widehat{B_1}=50^o\)⇒ a// b (dhnb 2 đường thẳng song song)

x=5,6

1.are skating

2.does....have

3.found

4.run

5.copy

6.to ask

7.sing

8.were

9.will go

10.will enjoy

a,đục >< trong

b,đen><sáng

c,rách><lành

dở><hay

\(3,5=\dfrac{7}{2}\)

tham khảo cách viết lại câu với "because of" ở đây nha bn:

https://baosongngu.com/because-va-because-of/

chúc bạn học tốt

because of his sickness, his father asked him to go to stay at home

✱cấu trúc viết lại câu từ "because" thành "because of" nha bn

\(\dfrac{6}{x+2}=\dfrac{3}{x-2}+\dfrac{12}{2x-4}\)(ĐKXĐ: x≠2; x≠-2)

⇔\(\dfrac{12\left(x-2\right)}{2\left(x-2\right)\left(x+2\right)}=\dfrac{6\left(x+2\right)}{2\left(x-2\right)\left(x+2\right)}+\dfrac{12\left(x+2\right)}{2\left(x-2\right)\left(x+2\right)}\)

⇔\(\dfrac{12\left(x-2\right)-6\left(x+2\right)-12\left(x+2\right)}{2\left(x-2\right)\left(x+2\right)}=0\)

⇒\(12x-24-6x-12-12x-24=0\)

⇔\(-6x-60=0\)

⇔\(x=-10\)(thỏa mãn ĐKXĐ)

vậy.....

246

câu hỏi đâu????