O H N I K J

a) Trên nửa mp có bờ chứa tia OH , ta có 

   Góc HOI < Góc HOK ( 30⁰ < 80⁰ )

\(\Rightarrow\)Tia OI nằm giữa 2 tia OH và OK . Ta có :

    Góc HOI +Góc IOK = Góc HOk mà Góc HOI =30⁰ , Góc HOK = 80⁰

^{\(\Rightarrow\)}30⁰+Góc IOK = 80⁰

                  Góc IOk = 80⁰-30⁰

\(\Rightarrow\)        Góc IOK = 50⁰

b) Vì tia OI và OJ là 2 tia đối nhau \(\Rightarrow\)Góc IOJ = 180⁰ 

Trên cùng 1 nửa mp có bờ chứa tia OI , ta có :

       Góc IOk < Góc IOJ ( 50⁰ < 180⁰ )

\(\Rightarrow\)Tia OK nằm giữa 2 tia OI và OJ . Ta có :

        Góc IOK + Góc KOJ = 180⁰ mà Góc IOK =50⁰

\(\Rightarrow\)        50⁰+ Góc KOJ = 180⁰

                                 Góc KOI = 180⁰-50⁰

\(\Rightarrow\)                  Góc KOI = 130⁰

c) Vì tia ON là tia phân giác của Góc IOK , ta có :

       Góc ION = \(\frac{GócKON}{2}\)= \(\frac{50^0}{2}\)=25⁰

\(\Rightarrow\)Góc ION =25⁰

Hok_Tốt

#Thiên_Hy

Trả lời :

1 + 1 + 1 + 1 + 1 + 1

= 1 x 6

= 6

~ Hok tốt ~

= 6

Lời bài hát

Wait a second, let me catch my breath
Remind me how it feels to hear your voice
Your lips are movin', I can't hear a thing
Livin' life as if we had a choice

Anywhere, anytime
I would do anything for you
Anything for you
Yesterday got away
Melodies stuck inside your head
A song in every breath

Sing me to sleep now
Sing me to sleep
Won't you sing me to sleep now?
Sing me to sleep

Remember me now, time cannot erase
I can hear your whispers in my mind
I've become what you cannot embrace
Our memory will be my lullaby

Sing me to sleep now
Sing me to sleep
Won't you sing me to sleep now?
Sing me to sleep

A-anytime
I would do
Time away
Yesterday-day
A-anytime
I would do
Time away
Yesterday-day

\(2x.\left(\frac{1}{2.5}+\frac{1}{5.8}+\frac{1}{8.11}+\frac{1}{11.14}\right)=\frac{1}{21}\)

\(2x.\frac{1}{3}.\left(\frac{3}{2.5}+\frac{3}{5.8}+\frac{3}{8.11}+\frac{3}{11.14}\right)=\frac{1}{21}\)

\(2x.\frac{1}{3}.\left(\frac{1}{2}-\frac{1}{14}\right)=\frac{1}{21}\)

\(2x.\frac{1}{3}.\frac{3}{7}=\frac{1}{21}\)

\(2x.\frac{1}{7}=\frac{1}{21}\)

\(2x=\frac{1}{3}\)

\(x=\frac{1}{6}\)

vậy \(x=\frac{1}{6}\)

cam on nhieu nhe ban

Số nhỏ nhất có 2 chữ số là : 10 vậy số kẹo táo là 10 cái

Tổng của kẹo dâu và kẹo cam là:

     199 - 10 = 189 ( cái )

Ta có sơ đồ 

Kẹo dâu 4 phần 

Kẹo cam 5 phần

Hòa có số kẹo cam là :

       189 : ( 4 + 5 ) x 5 =105 ( cái )

Hòa có số kẹo dâu là :

      189 - 105 = 84 ( cái )

              Đáp số : Kẹo dâu : 84 cái

                            Kẹo cam : 105 cái

                            Kẹo táo : 10 cái

Chúc bạn học tốt

a) x.(x+2)=0

=> \(\orbr{\begin{cases}x=0\\x+2=0\Rightarrow x=-2\end{cases}}\)

vậy x=0 hoặc x=-2

b) ( x + 3 ) . ( x - 4 ) = 0

=> \(\orbr{\begin{cases}x+3=0\Rightarrow x=-3\\x-4=0\Rightarrow x=4\end{cases}}\)

vậy x=-3 hoặc x=4

\(\text{a) Ta có:}\)

\(x\left(x+2\right)=0\)

\(\Rightarrow\orbr{\begin{cases}x=0\\x+2=0\Rightarrow x=-2\end{cases}}\)

\(\text{b) Ta có}:\)

\(\left(x+3\right)\left(x-4\right)=0\)

\(\Rightarrow\orbr{\begin{cases}x+3=0\\x-4=0\end{cases}}\Rightarrow\orbr{\begin{cases}x=-3\\x=4\end{cases}}\)

2 + 1 = 3 

Crashing, hit a wall
Right now I need a miracle
Hurry up now, I need a miracle
Stranded, reaching out
I call your name but you're not around
I say your name but you're not around

I need you, I need you, I need you right now
Yeah, I need you right now
So don't let me, don't let me, don't let me down
I think I'm losing my mind now
It's in my head, darling I hope
That you'll be here, when I need you the most
So don't let me, don't let me, don't let me down
Don't let me down

Don't let me down
Don't let me down, down, down
Don't let me down, don't let me down, down, down

Running out of time
I really thought you were on my side
But now there's nobody by my side

I need you, I need you, I need you right now
Yeah, I need you right now
So don't let me, don't let me, don't let me down
I think I'm losing my mind now
It's in my head, darling I hope
That you'll be here, when I need you the most
So don't let me, don't let me, don't let me down
Don't let me down

Don't let me down
Don't let me down, down, down
Don't let me down, down, down
Don't let me down, down, down
Don't let me down, don't let me down, down, down

Oh, I think I'm losing my mind now, yeah, yeah, yeah
Oh, I think I'm losing my mind now, yeah, yeah

I need you, I need you, I need you right now
Yeah, I need you right now
So don't let me, don't let me, don't let me down
I think I'm losing my mind now
It's in my head, darling I hope
That you'll be here, when I need you the most
So don't let me, don't let me, don't let me down
Don't let me down

Yeah, don't let me down
Yeah, don't let me down
Don't let me down, oh no
Said don't let me down
Don't let me down
Don't let me down (down, down, down)
Don't let me down, down, down

2+1=3

Bạn ak

Ta có sơ đồ :

HS nam |----|----|                               Tổng : 35 học sinh

HS nữ    |----|----|----| 

Tổng số phần bằng nhau là :

    2 + 3 = 5 ( phần )

Số học sinh nam là :

    35 : 5 x 2 = 14 ( học sinh )

Số học sinh nữ là :

    35 - 14 = 21 ( học sinh )

            Đáp số :................

~ Hok tốt ~

Số học sinh nữ là :
35 : ( 2 + 3 ) x 3 = 21 ( học sinh )
Số học sinh nam là :
35 - 21 = 14 ( học sinh )
Đáp số : ...

CR là

\(600\div\frac{2}{3}\)=900cm

Chu vi là

\(\left(900+\frac{2}{3}\right)\div2=450cm\)

\(Đáp\)\(số450cm\) 

ok ko bn n

Ta có hình vẽ:

Ta chia hcn thành 6 hình vuông có S = nhau.

S 1 hình vuông là: 600 : 6 = 100 ( cm2 )

Vì 10 x 10 = 100 nên cạnh của hình vuông dài 10 cm.

CD thửa ruộng là: 10 x 3 = 30 (cm)

CR thửa ruộng là: 10 x 2 = 20(cm)

Chu vi thửa ruộng là: (20 + 30) x 2 = 100 (cm)

Đs : 100 cm