# Posts by nathalie

Total # Posts: 43

**Math word problem**

so 1.50(x)/4 + 4.00(y)/4 = 712/4 0.375(x) + (y) = 178 (x) + (y) = 258 --------------------------------- -0.625(x) + 0(y) = -80 x= -80/-0.625 x= 128 x + y = 258 128 + y = 258 y = 258 - 128 y = 130 x = 128 (number of children tickets) y = 130 (number of adults tickets) And it ...

*February 22, 2017*

**Math word problem**

The admission fee at an amusement park is $ 1.50 for children and $ 4.00 for adults. On a certain day, 258 people entered the park, and the admission fees collected totaled $712 . How many children and how many adults were admitted? I tried doing it this way; x = amount of ...

*February 22, 2017*

**mat advance analysis**

thank you so much steve i get it. a|b, b=ae a|b+1, b+1=af substituting, ae+1=af 1=a(e-f), we conclude that a|b+1-b therefore a|1, a = ±1

*October 14, 2016*

**mat advance analysis**

True or False: If a|b and a|(b + 1), then a = ±1. [NOTE: Use this Theorem 3: If a|b and a|c, then a|(bx+cy) for any integers x and y. PROOF: Since a|b, there is an integer u such that b = au. Since a|c, there is an integer v such that c = av. Substituting, bx + cy = aux...

*October 14, 2016*

**Math**

Gene ad jay has collection of marbles. If jay give gene 2 of his marbles they would have an equal number. But if gene give jay 2 marbles, jay have 2 times as many as gene. How many marblea does jay have?

*August 19, 2016*

**math**

So 1/6

*April 14, 2015*

**Math**

jon drove 843 miles and rick drove four times as many miles how many miles did rick driv

*January 23, 2015*

**science**

What is the percent by mass solution made by dissolving 163g of table sugar cm 755g of water

*June 25, 2014*

**math**

A concert promoter wants to give away 240 tickets to 3 radio stations. Which basic math fact can he use to find 240 image 3 using mental math?

*February 6, 2014*

**Mathematics**

I need help on this following question there are 45 choirs members going to the recital.Each van can carry 8 people.How many vans are needed?

*September 16, 2013*

**geometry**

tan (?) = 3.5

*July 13, 2013*

**math**

4/5

*April 24, 2013*

**chemistry**

calculate the pH of the solution when 25.0ml of 0.0920M HCL is titrated with 0.15ml, 23.0ml, 30.0ml of 0.10M NaOH

*January 23, 2013*

**algebra 2**

find all the zeroes of: x^5-3x^4-24x^3-72x^2-25x+75=0 5x^5-20x^4-40x^3-16x^2-45x+180=0 -3x^5+3x^4+9x^3-7x^2+12x=12 x^3-x^2-13x-13=0 x^3+x^2=15x-15 Thank you for any help...I'm desperate please help :(

*December 31, 2012*

**Organic Chemistry**

Thin Layer chromatography TLC experiment What does it mean when it says with to much sample the spots will tail

*October 26, 2012*

**Math**

5.625

*October 17, 2012*

**3rd grade math**

849 750

*September 4, 2012*

**statistics**

suppose 25% of the urban population is 18 years old or younger. five residents of that city are selected at random find the probability that at least two of the selected five persons are 18 years old or younger. please help me with this question !!!

*May 22, 2012*

**historty**

who was lowell mill strikers

*April 9, 2012*

**geometry**

what kind of geometric figure is an angle bisector

*September 15, 2011*

**public health**

What are the purposes of public health surveillance? How are they implemented and utilized by communities, governmental agencies, and health care organizations or providers?

*August 24, 2011*

**healthcare**

ok thanks that is like the sanitation stage of 1800,s how they practiced using different techniques to help clear diseases.

*August 24, 2011*

**5th grade**

A concert promoter wants to give away 240 tickets to 3 radio stations. Which basic math fact can he use to find 240 image 3 using mental math?

*November 19, 2010*

**Chem**

Aviation fuel is significantly more expensive per gallon than diesel fuel. Why then is aviation fuel still used in Planes?

*October 15, 2010*

**fau**

The mass of an electron is 9.11\times 10^{-31}~\rm kg. If the de Broglie wavelength for an electron in a hydrogen atom is 3.31\times 10^{-10}~\rm m, how fast is the electron moving relative to the speed of light? The speed of light is 3.00\times10^8 ~\rm m/s.

*June 8, 2010*

**PHYSICS- Laws of Motion**

When the cathode is heated from the 6.3 V AC supply, electrons are emitted from its surface. These electrons fall on the grid (which is positive) and a current flows in the cathode/grid circuit. As electrons stream from the cathode toward the grid, they bombard atoms of the ...

*January 13, 2010*

**natural science**

What are the structural zones within the Earth? How are they detected scientifically?

*October 24, 2008*

**French**

I hope this question isn't too broad but.. When do you not pronounce the final letter of a word when the next word begins with a vowel? I hope that makes sense. I know that you are never supposed to say the "T" in "et" when it comes before a vowel but ...

*May 26, 2008*

**Debate**

Can someone give me some tips on how to do well in a debate and possibly win? I have an opening and closing statement, arguments for my topic, and arguments against the other topics. We are talking about the best alternative to using petroleum. My choice was public ...

*May 22, 2008*

**French**

What is the best way to say this? When one has a flat tire, it is necessary to put air in it. I have to translate this, and my best guess is Quand on a pneu à plat , il faut mettre de l'air dans ça That doesn't really look right me at the end. Could ...

*May 19, 2008*

**History**

Oops, I guess coying and pasting doesn't work here. Here are the rest: 5. Henry II 6. Richard the lionheart 7. John 8. Henry III 9. Edward I Longshanks 10. Edward II 11. Edward III 12. Henry VII 13. Henry VIII 14. Edward VI 15. Mary I 16. Elizabeth I 17. James I 18. ...

*May 17, 2008*

**History**

I asked a question about the monarchs of England earlier, and I did my timeline. Except there are supposed to be 23, and I only have 22. I am not supposed to add the monarchs of the Hundred years War or the Wars of the Roses. Can someone please check to see if I am missing one...

*May 17, 2008*

**History**

Who were the English Monarchs during the War of the Roses? And the Hundred Years War? During the wars of the roses, was it just Edward IV, Edward V, and Richard III? My teacher said there were four or five of them. And for the hundred years war was it just Richard III, Henry ...

*May 17, 2008*

**French**

I have to write a paragraph about driving and my car with a story about a driving experience. Unfortunately I forgot my book and I'm trying to come up with something on my own. My French isn't that good either. Could someone please help me with the words I don't ...

*May 15, 2008*

**Math... Sort of**

How much would 10 cents be worth in 1906? (Like relative to how much it would be worth now)

*January 16, 2008*

**Chemistry**

Ok thanks so much.

*January 13, 2008*

**Chemistry**

So.. my work wasn't right. Above your message?

*January 13, 2008*

**Chemistry**

Would you take the percentage of aluminum in the ore: 53.96/101.96 = 52.92 then take that much out of 2.0 metric tons or 2000 kg? So would it be 1058.40 kilograms?

*January 13, 2008*

**Chemistry**

How many kilograms of aluminum can be extracted from 2.0 metric tons of the ore 'alumina' (Al2O3)?

*January 13, 2008*

**Chemistry**

Could someone please check my Chemistry homework? The molecular formula for cisplatin, a chemotherapy agent, is PtCl2(NH3)2 (The numbers are all supposed to be subscripts) 1. What is the molar mass of cisplatin? Ans: 300.06 g/mol 2. How many moles of hydrogen atoms are in one ...

*January 13, 2008*

**psychology**

i think the answer of the question is B

*October 22, 2007*

**living environment help!**

what are 3 services which the fruit provides for the plant? Since this is not my area of expertise, I searched Google under the key words "fruit plant function" to get these possible sources: http://en.wikipedia.org/wiki/Flowering_plant#Fruit_and_seed http://www....

*April 12, 2007*

**galnds and their functions**

Why are aspirin and ibuprofen effective in treating headaches? Thank you for using the Jiskha Homework Help Forum. Aspirin and the NSAIDs inhibit cyclooxygenase, leading to a decrease in prostaglandin production; this reduces pain and also inflammation (in contrast to ...

*January 31, 2007*

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