Một xe đua bắt đầu chuyển động thẳng nhanh dần đều từ O, lần lượt đi qua hai điểm A và B. Biết AB = 20 m, thời gian xe đi từ A đến B là 2 giây và vận tốc của xe khi qua B là vB = 12 m/s. Tính: a. Vận tốc của xe khi qua A. b. Khoảng cách từ nơi xuất phát đến A. c. Tốc độ trung bình trên các quãng đường AB, OA, OB.

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Làm giúp mk với.Mk chỉ còn 55 điểm à còn hơi ít điểm xin mn giúp nha! Cảm tạ . Julie saw Tim and Matt at the swimming pool. Make past continuous questions to complete the dialogue. Sue: ................................................................. when you saw them? (what | Tim and Matt | do) Julie: Tim was swimming in the pool, but I didn't see Matt first. Sue: ................................................... in the pool, too? (you | swim) Julie: No, I wasn't. I was just looking. But then I saw Matt, too. Sue: .......................................... ? (what | he | do) Julie: He was diving in the pool. Sue: Diving, you say. ........................................... to dive? (he | not | just | try) He can't dive. Julie: You're right. He was just trying to do it. And all his friends were watching it. Sue: ............................................ ? (they | laugh) Julie: Of course, they were. Matt was pretty funny. He splashed the water all over the place. Sue: ....................................... faces when he came up to the surface of the pool? (Matt | make) Julie: Yes, he was. He was grinning and making faces at me. Sue: At you? Vow! And what about Tim? ............................................. Matt, too? (he | watch) Julie: Not really. He was looking at me instead. Sue: Oh, no! You're kidding. ......................................... your new swimsuit? (you | wear) Julie: Yes, I was. Why? Sue: Now I know why Tim and Matt were watching you, Julie.