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Làm hộ mình với ạ. Mình cần gấp đến 9h nha

Cho a và b thuộc N. Chứng minh rằng 5a^2+15ab-b^2 chia hết cho 49 khi và chỉ khi 3a+b chia hết cho 7. Giúp em với ạ, 30 phút nữa là em nộp rồi:(

1. The family succeeded in running out of the house before the walls A. damaged B. erupted C. collapsed D. felt 2. The rescue workers set up a camp to aid for the flood victims. A. provide B. call C. bring D. invest 3.12.Many villagers were to public shelters to avoid the volcanic eruption. A. evacuated B. given C. brought D. provided 4. There was a heavy rain which supported to the forest fire. A. put up B. put out C. give out D. give up 5. After the flood, many people in that village were homeless. A. put B. felt C. given D. left 6. Despite all the modem technology available to us, we’re still helpless ________natural disasters. A. against B. to C. with D. for 7.Choose the word or phrase that is CLOSEST in meaning to the underlined part in each of the following sentences. 8. Volunteers have given out food and blankets to homeless people in the flooded area. A. properties B. aid C. helping D. technology - 9. After the earthquake, his building was used exclusively for the accommodation of the victims. A. workplace B. houses C. markets D. office 10. By the next morning, several villages around Mount Sinabung were buried in ash and debris. A. damaged B. carried C. covered D. collapsed 11.Choose the word or phrase that is OPPOSITE in meaning to the underlined part in each of the following sentences. 12. The winds were so strong that trees, cars and even houses were picked lip and carried for miles. A. stood still B. damaged C. put out D. made up 13. We cannot prevent natural disasters, but we can prepare for them. A. avoid B. stop C. allow D. predict

giúp e với ạ tầm 8h30 là e phải nộp

Ai giải mik bài 10 với. Thankssssssss

Giúp mình với nhen tính giá trị biểu thức nhen

mn giup mik nha mik se cho ctlhn va 5 sao do :<

my____ room is our living room. It is quite big and warm. There is a large window with lots of potted plants and green and yellow _____ In our living room, _____ is a green sofa and two green armchairs. There is a large yellow ___ on the floor. A modern floor lamp ___ in the right corner of the room. ____ to the sofa there is a small coffee table with a vase of flowers. Next to the wall was a large table with six brown chairs. We have a television and a_____ with lots of books and pictures. We also have a CD player on the shelf. I usually watch TV, listen to ___ or read books there. I really like my living room.

Giúp với ạ, minh xin nghiêng mình cảm ơn sự giúp đỡ của bạn