6. Tính giá trị biểu thức x³ + 3xy + y³ biết x+y = 1

Chọn phát biểu sai về quan hệ giữa chuyển động tròn đều và dao động điều hoà là hình chiếu của nó A.biên độ dao động bằng bán kính quỹ đạo chuyển động tròn đều. B. vận tốc dao động bằng vận tốc dài của chuyển động tròn đều. C. tần số góc của dao động bằng tốc độ gốc của chuyển động tròn đều. D. li độ của dao động bằng toạ độ hình chiếu của chuyển động tròn đều Ai giải thích hộ em với ạ

4. Tình các cặp số (x , y ) ; x , y ∈ z thỏa mãn đẳng thức a) x + y = xy b) 5xy - 2y² - 2x² = -2

Exercise 1: Cho dạng đúng của động từ trong mỗi câu sau. 1. My mom always ................................delicious meals. (make) 2. Charlie…………………………..eggs. (not eat) 3. Susie………………………….shopping every week. (go) 4. ................................ Minh and Hoa ................................ to work by bus every day? (go) 5. ................................ your parents ................................with your decision? (agree) 6. Where……………………..he………………………from? (come) 7. Where ................................ your father ................................? (work) 8. Jimmy ................................. usually ................................ the trees. (not water) 9. Who ................................the washing in your house? (do) 10. They ................................ out once a month. (eat) Exercise 2: Mỗi câu sau chứa MỘT lỗi sai. Tìm và sửa chúng. 1. I often gets up early to catch the bus to go to work. ……………………………………………………………………… 2. She teach students in a local secondary school. ……………………………………………………………………… 3. They doesn’t own a house. They still have to rent one to live. ……………………………………………………………………… 4. Bui Tien Dung am a famous goalkeeper in the National Football Team. ……………………………………………………………………… 7. What do your sister do? ……………………………………………………………………… 8. John and Harry doesn’t go swimming in the lake. ……………………………………………………………………… Giúp mình với ạ mình sẽ cho câu trả lời hay nhất

VI. Fill in the blanks with some / any / much / many / a lot of / lots of / plenty of 1. Is there ______ butter left? – Yes, there’s ____ butter. 2. How _______ lemons are there? I think two. 3. There aren’t _______ strawberries. Do you want me to buy ________ more? 4. Oh no! There’s isn’t _______ juice. Just one carton. 5. There are ________ soda cans but only ______ bottle of beer. 6. There are only a _____ sausages, right? – No, there are plenty. 7. We need ________ more pears. There aren’t ________ left. 8. There aren’t _____ eggs in the fridge. 9. There is ________ fruit in the fridge but only _____ vegetables. 10. How ______ cheese is there? There is only ______ cheese left.

Complete the following sentences, using the verb given Subjects Remember that +You are allowed to use the verb to be for 3 times maxmum + Each hsentence must contain at least 10 words 1 Humans 2 Playing PC game 3 Environmental pollution

VI. Many / Much / A few / A little / A lot of / Lots of / Plenty of / A large amount of 1) _____ pens 2) _______ lemonade 3) _______ peaches 4) _______ fruit 5) _______ sugar 6) _______ bread 7) _______ mugs 8) _______ apples 9) _______ eggs 10) _______ children 11) _______ brushes 12) _______ chocolate 13) _______ ham 14) _______ potatoes 15) _______ coffee VII. How many / How much 1) _____________ candles did you put on the cake? 2) ________ sand do you need to build a sandcastle? 3) _____________ eggs can you eat? 4) ___________ subjects have you got in 8th grade? 5) _____________ water can you drink? 6) _____________ stones did you collect yesterday? 7) _____________ meat are you bringing? 8) ________ films do you borrow from Blockbuster? 9) _____________ homework do you have a day? 10) ____________flour do you need to bake a cake?

Tính \(A=\sin^225^o+sin^265^{6o}-tan35^o+cot55^o-\frac{cot32^o}{tan58^o}\)

Fill in the gaps with the correct verb tense of the verbs in brackets. Make sure you the sentence is a first type conditional sentence. 1. If it ___________ (rain), I __________ (get) wet. 2. If I _________ (pass) the exam, my parents ___________ (give) me a gift. 3. If he _____ (fail) the exam, he___________ (be) very disappointed. 4. If the cable TV ____________ (not/work), we __________ (rent) a DVD. 5. If the baby _____________ (not/eat), we ____________ (see) the doctor. 6. Max ______________ (pass) the exam if he ______________ (study) hard. 7. If he __________ (be) at home, I ______________ (visit) him. 8. If she _________________ (not /do exercises) every day, she __________ (not / be) healthy. 9. If Tom ______________ (not/ water) the violets, they ____________ (die). 10. If they __________ (catch) the bus, they _________________ (arrive) on time

a)(x+y+z)(z-y+z) b)(x-y-z)(x+y+z) c)(x-y+z)(x+y-z) d)(a+b-c)(b+c-a) e)(a+b-c)(b+c-a) HỨA VOTE 5 SAO