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three lines dissect a big triangle into four triangles and three quadrilaterals. the sum of the perimeters of the three quadrilateral is 25 cm, the sum of the perimeters of the four triangle is 20 cm. the perimeter of the big triangle is 19 cm. how big is the sum of the lengths of the three dissecting lines?
Mickey is asked to multiply four positive integers, but he adds them instead.Amazingly, his correct answer is equal to the correct answer for the multiplication problem.What is the sum of these four numbers?
giúp mình với,mik cần gấp,toán tiếng anh,viết cả lời giải!
I. Read the following passage and decide if it is T or F.Many people still believe that natural resources will never be used up. Actually, the world’s energy resources are limited. Nobody knows exactly how much fuel is left. However, we also should use them economically and try to find out alternative sources of power. According to Professor Marvin Burnharm of the New England Institude of Technology, we have to start conserving coal, oil and gas before it is too late; and nuclear power is the on...
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I. Read the following passage and decide if it is T or F.
Many people still believe that natural resources will never be used up. Actually, the world’s energy resources are limited. Nobody knows exactly how much fuel is left. However, we also should use them economically and try to find out alternative sources of power. According to Professor Marvin Burnharm of the New England Institude of Technology, we have to start conserving coal, oil and gas before it is too late; and nuclear power is the only alternative.
However, many people do not approve of using nuclear power because it’s very dangerous. What would happen if there was a serious nuclear accident? Radioactivity causes cancer and may badly affect the future generations.
The most effective thing is that we should use natural resources as economical as possible.
Statements | T/ F |
1. Natural resources will run out. 2. The world’s energy resources are unlimited. 3. We know exactly how much fuel is left. 4. We should use fuel economically. 5. According to Professor Marvin Burnham, nuclear power will be used as a substitute for natural resources. 6. Many people disagree to use nuclear power as an alternative energy. 7. Radioactivity from nuclear power causes cancer and may have bad effect on the future generations. 8. Natural resources should be used as economical as possible. | 1…… 2…… 3…… 4…… 5……
6…… 7……
8……
|
1. Complêt the sentences , using although , despite , in spite of , however , or nevertheless. Sometimes , two answears are possible.1. I think i did OK in my speech last night -------------------- Id had almost no sleep for 24 hours.2. ---------------------- I heard the telephone ring , I didnt answer it.3. We enjoyed our holiday ------------------- the rain.4. -------------------- he got top marks at high school , he never went to university.5. -------------------------- there was no electrici...
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1. Complêt the sentences , using although , despite , in spite of , however , or nevertheless. Sometimes , two answears are possible.
1. I think i did OK in my speech last night -------------------- I'd had almost no sleep for 24 hours.
2. ---------------------- I heard the telephone ring , I didn't answer it.
3. We enjoyed our holiday ------------------- the rain.
4. -------------------- he got top marks at high school , he never went to university.
5. -------------------------- there was no electricity , I was able to read because I had a candle.
6. She failed the test ------------------ she studied hard.
7. --------------------- difficulties , the firemen managed to save many people who were caught in the fire.
8. Everone thought she would accept the offer . -----------------------, she turned it down.
9. Carol arrived at the meeting --------------------- I asked her not to be there.
10. It looks like they're going to succeed------------------ their present diffculties.
11. ---------------------- it was raining heavily , he went out without a raincoat.
12. My father is very busy.--------------------------, he is always willing to give a hand with the housework.
13. The sky was grey and cloudy .----------------------- , we went to the baech.
14. Some Englis words have the same pronuncation--------------------- they are spell differently , for example , dear and deer.
2. Put question for the underlined part of each sentence: CHỮ IN HOA LÀ PHẦN GẠCH CHÂN NHÉ!
1. I have known Marie FOR NINE YEARS.
2. YES , they used to be friends at the university.
3. Sarah left TWO HOURS AGO
5. She is watching TOM AND JERRY.
GIÚP MK VS , MK ĐANG CẦN RẤT GẤP , MAI MK PHẢI NỘP BÀI RỒI . HELP ME!!!!!!!
A function f is defined for non-negative integers n and k as follows f(0,n) = n + 1; f(k,0) = f(k-1,1) ; f(k+1,n+1) = f(k,f(k+1,n)). Evaluate f(2,2).
Jane draws a circle and a triangle on each page of her booklet, and near each drawing she writes the number of common points of the circle and the triangle.
How many different numbers can she write
A beetle starts at correr A of a aquare ABCD. Each minute, the beetle moves along axactly one side of the squaer from one correr of the square to another correr. For exmple, in the first two minutes, the beetle could have one of 4 walks: ABA, ADA, ABC, ADC. How many walks can the beetle have from correr A to correr C in 10 minutes?
adam bought a number of ping-pong balls in a store in Texas, where a 5% sales tax is added to every purchase. If he didn't have to pay tax, he could have bought more 3 balls for the sam amount of money. How many balls did he buy
If p is a prime number such that there exist positive integers a and b such that \(\frac{1}{p}=\frac{1}{a^2}+\frac{1}{b^2}\) then p = ?