luc 6 gio 15 phut em dap xe den truong cach nha 3km voi toc do trung binh muoi hai km/h

a)tim thi gian em da chay xe va cho biet em den truong luc nao?

b)tu truong ve nha em van chay voi toc do cu.Nhung duoc nua duong bi ket xe nen em vong qua duong khac.voi toc do tang them 3km/h.Tinh toc do trung binh cua em tren quang dung ve

giup mik nha cac ban men yeu

mai mik phai nop lai bai co thay rui

cam on cac ban nhieu

hai xe xuat phat cung luc tai hai diem A,B cach nhau 120km.Xe mot chay voi toc do 30km/h.Xe hai chay ve xe mot voi toc do 54km/h

a)toc do xe ao lon hon va lon hon bao nhieu lan

b)sau bao lau tu luc xuat phat hai xe co the gap nhau tren duong

giai ho minh voi cac ban

cam on cac ban nhieu

a)4x(x-2019)-x+2019=0

b)3x(2x-3)=6-4x

giup mik nh everyone

a)27^3-72x=0

b)x^2+4x+4=6(x+2)

giup mik nha cac ban

a) x^2+4x+4=6*(x+2)

b)27^3-72x=0

giup mik nha moi nguoi

bai nay da lam minh nat oc bua gio roi

lam d hay sai minh cung tich dung cho nguoi giai dau tien

cam on moi nguoi

cho tam giac abc vuong tai A(A=90do)AB<AC AH la duong cao.goi O la trung diem BC,D la diem doi xung cua A qua O

a)Chung minh ABDC la hinh chu nhat

b)Tren tia doi HA lay E sao choHE=HA

c)CM:tam giac AED vuong va BE vuong goc voi CE

mot xe co khi luong mot tan chay deu tren duong voi toc do 72km/h

a)tinh quang duong xe chay trong 1 gio 30 phut

b)khi chay luc ma sat can lai chuyen dong cua xe va co do lon bang 0,1 lan trong luong xe

tim do lon cua luc ma sat

vi sao tren mo xe nguoi ta lam nhung ranh nho

giup minh nhe everyone

thanks very much