Vì đthi hàm số cắt trục hoành tại điểm có hoành độ bằng 2

Thay vào phương trình hàm số ta được:

$\left(1-4m\right).2+m-2=0$

$\Rightarrow -7m=0$

$\Rightarrow m=0$

$\mathrm{Vậy\; m=0\; thì}$ đthi hàm số cắt trục hoành tại điểm có hoành độ bằng 2

#hoc24

a ) trong 1 mol nguyên tố=%Fe = 56/(56 + 16)x100 % ≈ 77,8 % `

b) % F e = (56⋅2)/(56 ⋅ 2 + 16 ⋅3 )= 70 %

-ba ...go to dalat in summer when he was young

B(used to) -i wish my pen pal ...here tomorrow

C(is coming)

-a : whould you mind lending me your bike ? A .yes,here it is

1. Nobody can go,_____ can they_____

2. I think he will come here,_____ won't he_______

3. We must send this message by email,_____ needn't we______

4.you mustn't come late____ must you_____

5. I wish to study English,_____ don't I_____

ak lỗi rồi

Bao gạo thứ nhất nặng hơn bao gạo thứ hai số kg=18,8 – 6,4 =12,4 (kg)

Bao gạo thứ nhất nặng số kg=12,4 : (3 - 1) x 3 = 18,6 (kg)

Bao gạo thứ hai nặng số kg=18,6 : 3 = 6,2 (kg)

Vậy bao gạo thứ nhất=18,6 kg

bao thứ hai=6,2kg

#hoc24

48x1/2=24x2x1/2=24

#hoc24

a) Núi rừng Trường Sơn như bừng tỉnh.

you turn off all the lights, you will not pay more money

she doesn't wear warm clothes, she will have a cold

you aren't careful, you may have an accident

you don't phone your parents, you will have a trouble

she doesn't whisper, everyone will know what she is saying

you don't pay electricity bill today, your electricity will be cut off

you don't stop smoking, your cough will be worse

we don't use less fossil fuel, they will be run out soon

it doesn't stop raining today, we may be faced with a serious flood

you do morning exercise regularly, your body will be fitter

we don't use renewable energy, we will have nothing for the future generation

we don't reduce the use of non-renewable energy, the climate will change

you lock all the doors, no one can break into your house

we continue hunting polar bears, they will become extinct in near future (câu này đề sai rồi vì nếu chúng ta tiếp tục săn gấu bắc cực thì chúng sẽ tuyệt chủng)