$x^{2}$ + 6x + 8 ( hết) giúp mik vs!

a,1+2+3+...+2012+2013 b,6^2:43+2.5^2

Fill in each blank with a suitable relative pronoun (Who, that, which, where, whose) 1.I recently visited the school_______ I used to study five years ago. 2.I can’t understand the dance ________I saw at the festival last spring. 3.I’m really interested in the present______you gave me on my birthday. 4.Have you seen the photos________ I took at the camp last week? 5.The man ________ visited our school yesterday is a famous artist. 6.The girl _________ is standing over there is my younger sister. 7.Mary works for a company______makes toys for children. 8.The supermarket ________ was destroyed in the fire has now been rebuilt. 9.The bus ________ runs every twenty minutes goes to Tan Son Nhat airport. 10.An Architect is someone________ designs buildings. 11.I don’t like people _______often tell lies. 12.Alexander Bell was the man _______invented the telephone. 13.The sun________ is one of million of stars in the universe provides us with heat and light. 14.The book _______ you borrow yesterday is a present from my uncle on my 15th birthday

Mình đang cần gấp, cảm ơn mn nhiều ạ

B1: tìm các số thích hợp ở ? a . 0 = ? a : 1 = ? 0 : a = ? ( với a ko bằng 0 )

Một đèn chiếu gồm một gương cầu lõm và một bóng đèn coi như nguồn điểm, có thể dịch chuyển dễ dàng trên trục chính của gương. Đặt màn quan sát E cách gương a=3,6cm rồi làm theo thứ tự sau: Dịch chuyển nguồn sáng đến khi vòng tròn sáng trên màn E có đường kính đúng bằng đường kính đường rìa của gương cầu Do= 20cm, đây là vị trí (1). a. Từ vị trí (1) dịch chuyển nguồn sáng đúng một đoạn l = 6cm, thì vòng tròn sáng trên màn E có đường kính D = 6cm. Hãy tính tiêu cự của gương cầu. b. Từ vị trí (1) phải dịch chuyển nguồn sáng theo chiều nào, dịch chuyển bao nhiêu để ảnh của nguồn sáng hiện rõ nét trên màn.

Hai xe ôtô chở tổng cộng 4554 kg thức ăn gia súc, xe thứ nhất chở 42 bao, xe thứ hai chở nhiều hơn xe thứ nhất 15 bao. Hỏi mỗi xe chở bao nhiêu kg?

cali : Mai Phương 2 tone màu nhó trang trí + đổ bóng giấy caro hoặc dot nhận tradi not digi luật hoidap hóng~~

Bài 13: Write the second sentence so that it has the same meaning to the first one. 1. Sue started to eat a low carb diet two years ago. →Sue has 2. Could you take me to the airport Friday morning? →Would you mind 3. How about going to the movies tonight? →Let’s 4. July stayed home from school yesterday because she had a high fever. →July had a high fever, 5. She eats fruits and veggies every day, but she keeps gaining weight. →Although 6. Mark’s gained 5 kilos since he quit smoking. →Mark’s put 7. Joana doesn’t eat much in order not to be overweight. →Joana doesn’t eat much because 8. It’s a good idea to do exercise regularly. →You Bài 14: Choose the best answer a, b, c, or d to complete the sentence. 1. Please wake me ________ at 5 and we will leave at 6 in the morning. a. up b. on c. over d. in 2. If you want to ________ weight, you should follow a low-fat diet. a. lose b. gain c. put on d. take 3. Junk foods are high in fat, sodium and sugar, which can lead to ________. a. fever b. allergy c. obesity d. stomachache 4. He looks so ________. He can’t keep his eyes open! a. happy b. tired c. healthy d. fit 5. If you want to stay healthy, eat ________ vegetables, whole grains, fruit and fish. a. much b. fewer c. more d. less 6. Fruit tastes good ________ it’s healthy for your body. a. so b.but c. or d. and 7. You are ________ you eat, so don’t eat unhealthy foods. a. what b.who c. which d. that 8. She looks very tired. She should work ________ or she will get sick. a. well b. less c. more d. enough 9. She stays in ________ by exercising daily and eating well. a. health b. fit b. size d. shape 10. Don’t sit too close to the screen, ________. a. and you’ll hurt your eyes b. so you can see more clearly c. or you’ll get a headache d. but it’s bad for your health

Tìm giá trị lớn nhất A= -3x(x+3)-7 B= -2x^2 +5x-8 C=3-x^2+4x Gỉai chi tiết nhé