1. Lan goes to the market in order to buy some fish and vegetables.

2. He has been studying English since 2009.

Phương trình các cạnh

AB: 2x- 5y +7=0

BC: x+4y- 16=0

AC: x- 9y -3=0

/ɔi/ : boil , boy , noisy , toy , voice , coin.

/au/ : shout , house , around , flower , down , south , round , town , out , cow , how.

a) \(\dfrac{3x}{5}=\dfrac{1-4x}{3}\)

⇔ 9x = 5(1-4x)

⇔ 9x = 5 - 20x

⇔ 9x + 20x = 5

⇔ 29x = 5

⇔ x = \(\dfrac{5}{29}\)

b) \(\dfrac{x}{5}=\dfrac{15}{3x}\)

ĐKXĐ : x≠0

⇔ \(\dfrac{x}{5}=\dfrac{5}{x}\)

⇔ x² = 25

⇔ x = 5 ; x = -5

đáp án là: 1050 con gà

tích cho mình nha các bạn

Mình lỡ nhấn trả lời , mình ghi lại kết quả nhé:

1) water pollution is the contamination of bodies of water such as lakes, rivers, oceans, and groundwater.

2) It is one of the most serious types of pollution.

3) Factories dump industrial waste into lakes and rivers.

4) Farms using pesticides to kill insects and herbicides to kill weeds can also lead to water pollution.

5) These factors cause ‘point source’ pollution while pollutants from storm water and the atmosphere result in ‘non-point source’ pollution.

1)water pollution/be/contamination/bodies of water/such/lakes/rivers/oceans/groundwater

—>

2)it/be/one/most/serious/types/pollution

.......................................................................

3)factories/dump/industrial waste/lakes/rivers

.............................................

4)farms/use/pesticides/kill/insects/herbicides/kill/weeds/also/lead/water pollution

.............................................

5)these factors/cause/''point source'' pollution/while/pollutants/storm water/atmosphere/result/''non-point source'' pollution

(5²⁰¹³+5²⁰¹²) : 5²⁰¹²

= (5+1) . 5²⁰¹² : 5²⁰¹²

= 6 . 5²⁰¹² : 5²⁰¹²

= 6 . 1

= 6

Vậy kết quả của phép tính trên là D