cái bài tính đấy á?!

giụt sách đó rồi ghi đề ra

cho hỏi có ai chuyên Lý 8 hông v cho mình hỏi xíu

Việt Trì trong trái tim em dk

viết dấu có đc k ạ

viet co dau nha

Tham khảo!

It's a truth that in love and war,
World's collide and hearts get broken,
I want to live like I know I'm dying,
Take up my cross, not be afraid

[Chorus]
Is it true what they say, that words are weapons?
And if it is,then everybody best stop steppin',
Cause I got ten in my pocket that'll bend ya locket,
I'm tired of all these rockers sayin' come with me,
Wait, it's just about to break, its more than I can take,
Everything's about to change,
I feel it in my veins, its not going away,
Everything's about to change.

It creeps in like a thief in the night,
Without a sign, without a warning,
But we are ready and prepared to fight,
Raise up your swords, don't be afraid,

[Chorus]

This is a warning, like it or not,
I break down, like a record spinning,
Gotta get up,
So back off,
This is a warning, like it or not,
I'm tired of listenin', I'm warning you, don't try to get up,

There's a war going on inside of me tonight (don't be afraid) [x2]

Wait, it's just about to break, its more than I can take,
Everything's about to change,
I feel it in my veins, its not going away,
Everything's about to change,
It's just about to break, its more than I can take,
Everything's about to change,
I feel it in my veins, its not going away,
Everything's about to change.

Gọi chiều dài, chiều rộng hình chữ nhật lần lượt là a,b (a>b>0) (m)
Theo đề, ta có

2a + 2b = 140 *

a = b + 10 **
Thay ** vào *, ta có :
2(b + 10) + 2b = 140
 4b + 20 = 140 => b = 30 m
                              a = b + 10 = 40 m
 

4:

a: Xét ΔBAH vuông tại H và ΔBCA vuông tại A có

góc B chung

=>ΔBAH đồng dạng với ΔBCA

=>BA/BC=BH/BA

=>BA^2=BH*BC

b: ΔABC vuông tại A có AH là đường cao

nên HA^2=HB*HC

c:Sửa đề; Cắt AH tại D

DA/DH=BA/BH

EA/EC=BA/BC

=>DA/DH*EA/EC=BA/BH*BA/BC=1

Ta có:

\(P\left(0\right)=0x+b\)

\(\Rightarrow b=2007\)

\(\Rightarrow A\left(1\right)=a+b\)

Mà \(b=2007\)

\(\Rightarrow a+2007=2006\)

\(\Rightarrow a=1\)

Vậy \(P\left(x\right)=-x+2007\)

ủa cái này là toán mà ????

Bạn hỏi qua bên phần toán nha

mấy bài chứng minh tớ yếu lắm, không giúp được, xin lỗi bạn nha