Cho hai đại lượng tỉ lệ nghịch X và Y. X1; X2 là hai giá trị của X; Y1, Y2 là hai giá trị của Y. a) Biết X1.Y1= 45 và X2=9. Tính Y2 b/ Biết X1= 2; X2=4, Y1+Y2 = -12.Tính Y1; Y2 c/ Biết X2= 3; X1+ 2Y2= 18 và Y1= 12. Tính X1; Y2

Tính diện tich phần tô đậm của hinh tròn, biết hai hình tròn cùng tâm o và có bán kính lần lượt là 0,8m và 0,5m Giải giúp mk nha mọi người

Bài 5. Tìm giá trị nhỏ nhất của biểu thức P=\x-2019|+|x-1|

512.(2-128)-128.(-512) giúp mik với ạ mik sẽ vote+ cảm ơn

Vẽ hình giúp mình bài 1 và 2 nhé

1/ _________________________________________________________ - He is practicing the guitar. 2/ __________________________________________________________ - I usually play soccer after school. 3 ___________________________________________________________ - My mother likes playing tennis. 4// __________________________________________________________ - Lan goes swimming three times a week. 5/ __________________________________________________________ -They are going to see a movie tonight. 6/ __________________________________________________________ -Nam wants to go shopping. 7/ ___________________________________________________________ -The children are in the library. 8/ ___________________________________________________________ -Children should brush their teeth after meals. V. Using “How often” . Then write questions and answers with the cue words. 1/ Nam/ go to the movies// usually _____________________________________________________________? ______________________________________________________________ 2/ They/ play volleyball// afternoon ______________________________________________________________? _______________________________________________________________ 3/ You/ go swimming//three times a week _______________________________________________________________? ________________________________________________________________ 4/ Nam and Lan/ play computer games// sometimes _______________________________________________________________? ________________________________________________________________ 5/ She/ go to the zoo _______________________________________________________________? ________________________________________________________________ 6/ He/ study in the library// never ________________________________________________________________? ________________________________________________________________ 7/ Hoa/ write to Tim// every month ________________________________________________________________? _________________________________________________________________ 8/Your mother/ play tennis// often ________________________________________________________________? ________________________________________________________________ 9/ The students/ go camping// twice a week _________________________________________________________________? ________________________________________________________________ 10/ Lan’s father/ watch TV// every night ________________________________________________________________? _________________________________________________________________ VI. Write the questions and answers about the activities after school with the cue words: 1/ you/ play badminton _______________________________________________? _________________________________________________________________ 2/ Nam/ study in the library ___________________________________________? __________________________________________________________________ 3/Tuan and Phong / play video games _____________________________________? ___________________________________________________________________ 4/ Your brother/ Watch videos ___________________________________________? ___________________________________________________________________ 5/ they/ go to the stamp collector’s club _____________________________________? ____________________________________________________________________ 6/ your sister/ learn to play the piano ________________________________________? ____________________________________________________________________ 7/ your children/ go swimming ____________________________________________? _____________________________________________________________________ 8/ Mai/ skip with her friends ______________________________________________? _____________________________________________________________________ 9/ your friends/ help their mother with the housework _____________________________________________________________________? _____________________________________________________________________ 10/ your teachers/ play blindman’s bluff _____________________________________________________________________? ___________________________________________________________________

Hai máy bơm cùng bơm nước vào một bể cạn thì trong 6 giờ 40 phút đầy bể. Nếu máy bơm thứ I bơm trong 4 giờ và máy bơm thứ II bơm trong 5 giờ thì hai máy bơm bơm đc 2/3 bể. Hỏi mỗi máy bơm nếu bơm 1 mình thì bao lâu đầy bể?

Số gia của hàm số f(x)=x^3 , ứng với x0=2 , denta x=1

Điền giới từ thích hợp Giúp em với ạ, em cảm ơn

với p là số nguyên tố , p>3 CMR:p^2-1 chia hết 24 gấp ạ