Cho hình chóp SABC có đáy ABC là tam giác vuông cân tại B, AB = a. SA vuông góc với mặt phẳng (ABC) và SA= 2a . M là trung điểm SA. a) Tính góc tạo bởi mặt phẳng (SBC) và (SAB). b) Tính góc tạo bởi mặt phẳng (MBC) và (ABC). c) Tính góc tạo bởi mặt phẳng (SAC) và (SAB).

Tìm x,y,z biết 42x=60y=35z và x+y-z=60 Cảm ơn trước ạ

Bạn nào có thể giải mik bài này đc hông ạ Mik sẽ cho 5 sao ạ Hết bài luôn ạ

Circle the word which has different sound in the underlined part in each line (0,5pt) 1. A. skateboard B. school C. basket D. instead Circle the word which has a different stress pattern from the others (0,5pt) 2. A. competition B. commemorate C. musician D. activity Circle the best answer to complete each of the following sentences (2,0pts) 3.Mai: We have a tradition of visiting the grandparents in Ha noi every weekend. Tom: …………………….. A. You’re kidding! B. Yes, sure ! C. You won’t regret it! D.You’re welcome! 4.………… Thai’s main food is rice, especially sticky rice. A. Some B. A C. The D. X 5. Some people believe that they should celebrate Mid – Autumn Festival to…… The Moon Genie. A. celebrate B. offer C. prepare D. worship 6. She is a hard – working girl . She loves…………. DIY. A. do B. did C. doing D. does Write the correct forms of the words in bracket to complete the sentences (0,5pt) 7. A normal motorist drives____________________ than a racing driver. ( SKILLFUL) 8. You can do ____________ activities such as yoga or listening to music . ( REXAL) EADING Fill in each blank with one suitable word from the box. Write the word in the gap (1pt) outside praise Every year hate tradition inside Mid-Autumn festival is a big event in my family. ¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬(9)_____________, all members of my extented family will gather at my grandparents’ house and, make moon cakes together. This is our (10) _________ for many generations. Making moon cakes might look difficult at first but after a few times, I was able to make my own moon cake. The cake is made by flour with water and golden syrup. You can add a lot of things you want (11)______________ the moon cake. There are typically one or two egg yolks at the center of the cake. Each year, my family makes dozens of moon cakes then gives them to my friends, relatives and neighbours. They always (12)____________ our family’s cakes: some even order more their friends. Giúp mình với!!!

Mọi người giúp em câu này ( 37-17 ) . ( -5 ) + 23 . ( -13 -17 )

lim32^2+80+2020=? lim2020=? lim √234+32=?

Trong một ngày cửa hàng bán được 135 kg gạo . Buổi sáng cửa hàng bán được 30kg gạo, buổi chiều bán được 3/5 số gạo còn lại . Hỏi buổi tối cửa hàng bán được bao nhiêu kg gạo

Môi trường gồm cao thịt bò, cao nấm men, cơm là môi trường:

Rewrite these sentences, using relative pronouns Tom was tired and wanted to stop. He had been driving all day. * Her book was published last year. It became a best seller. * What was the name of the year? Your son was born on that year. *

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