Super speed kettle nghĩa là gi
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b. 2017: the year when a prototype (the first design of the Skylon) will be ready according to plan.
c. 90,000,000: the amount in dollars that the United Kingdom announced it would spend developing the Skylon.
d. 300: the number of passengers the Skylon could bring from London to Sydney in four hours.
e. 1,000,000,000: the amount in dollars (more than a billion dollars) that the final costs could amount to.
f. 15 tons: the weight equivalent (up to 15,000 kilograms) that could be dropped off as a load in outer space (e.g., at the International Space Station).
g. 4 hours: the travel time to bring passengers from London to Sydney, or to access anywhere in the world.
A Skylon is the plane that can travel extremely fast.
The Skylon could take off from any runway in the world.
John Hansman is the head of MIT's International Center for Air Transportation.
Many scientists feel optimistic about the project.
Ta có:P=(/x-3/+2)^2+(y+3)+2017
Ta thấy:/x-3/\(\ge\)0
\(\Rightarrow\)/x-3/+2\(\ge\)2
\(\Rightarrow\)(/x-3 +2)\(^2\)\(\ge\)4
y\(\ge\)0
\(\Rightarrow\)y+3\(\ge\)3
Do đó (/x-3/+2)\(^2\)\(\ge\)4+3+2017
=2024
Vậy giá trị nhỏ nhất của P là 2024\(\Leftrightarrow\)+, /x-3/=0
\(\Rightarrow\)x-3=0
x =0+3
x =3
+, y+3=0
y =0-3
y =-3
1. All the paintings are displayed in the gallery by the painter.
2. The kettle is turned off by Jim.
3. The door is always locked by Peter before 9 p.m.
4. Are you taken to the airport by Jim?
5. How often is the room cleaned by Jane?
6. A long essay is rarely written by my brother.
7. Flowers are arranged beautifully by my aunt.
8. The new car is sometimes driven to work by Mr. Smith.
9. English is never spoken outside the classroom by me.
10. The gate is never opened.
11. Bottles are made from plastic.
12. The wedding photo is hung on the wall by Jane.
13. This place is guarded twenty-four hour a day.
14. Jim's blog is written and posted on social network site by him.
15. Winter wheat is harvested in late July.
Your future house will have a super smart TV, won't it?
Despite having tried our best, we didn't win the game











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