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The area of a parallelogram 2003-04-06
A student pose la question :
Find the area of the parallelogram with vertices (0,0),(7,2),(10,7),(3,5)
Penny Nom lui répond.
The height of an equilateral triangle 2003-04-06
Rosa pose la question :
If Each side of an equilateral triangle is 10 m. What is the height?
Penny Nom lui répond.
How many hits? 2003-04-06
Jack pose la question :

My name is Jack. I'm a uncle. Student is in the 5th grade email is above.

If a baseball player at sping training had a good season with the following:

one seventh of his hits were doubles.
12.5% of his hits were home runs.
But didn't have any triples.
How many hits did he have?

Can you give me an explanation of you solved the problem.


Penny Nom lui répond.
Divide a circle in 8 equal pieces 2003-04-04
Naomi pose la question :
I have to divide a circle in 8 equal pieces but can only cut 3 times
can you please help me

Penny Nom lui répond.
La somme de 51 nombres entiers consécutifs est 1785 2003-04-01
Katrine et Armand pose la question :
La somme de 51 nombres entiers consécutifs est 1785, quels sont ces nombres? (indication : on rappelle que pour tout entier P, on a 1 + 2 + ....+ P = P (P + 1) / 2).
Claude Tardif et Penny Nom lui répond.
Uses of conic sections 2003-04-01
William pose la question :
My name is William and I am doing a research paper on conic sections for my 12th grade math class. Part of the project is to find two conic sections in our world today and explain what there purpose is. I really need help in this area because I've been searching the internet for where conic sections are used in our world today and I really can't find anything. If you can tell me specific building or a pyramid that contains conic sections that would be great. Or even something in the universe would be helpful.
Leeanne Boehm lui répond.
Doubling the size of an object 2003-04-01
Dave pose la question :
If I have a known surface area and volume of an unknown object and I want to double the size of the object, how do I find the new area and volume?
Walter Whiteley lui répond.
Le terme 2003-04-01
Francine pose la question :
Je suis une enseignante de 5e/6e et j'aimerais savoir comment on traduit le terme "array" en français.
Claude Tardif lui répond.
A handshake problem 2003-03-31
Jaylan pose la question :
Suppose you and your partner attend a party with n other couples. Several handshakes took place. No one shook hands with himself (or herself) or with their partner, and no one shook hands with the same person more than once. After all the handshaking was completed, suppose you asked each person, including your partner, how many hands they had shaken. Each person gave a different answer.

Determine how many hands did you shake and how many hands did your partner shake when n=5

Penny Nom lui répond.
Quadratic word problems 2003-03-30
A student pose la question :
Question:
i think i know the basics of how to solve direct quadratic equations,but how do i go about solving those word problems? i have tried them times and again, but nothing seems to work at all!they are driving me crazy! pls help!:):):):):)

  1. bob & nick earned $1260 each. bob's hourly wage is $3 more than nick's hourly wage. he worked 2h less compared to nick. find the number of hours nick worked.
  2. there are 2 tanks in henry's house. in tank A, the fish are all goldfish. they are bought at a total cost of $259. in tank B, there are only guppies. the guppies were bought at a cost of $1.20 each. a day later,henry bought 3 more goldfish and put them into tank A. the number of guppies in tank B is now twice the number of goldfish in tank A.the total cost of all the fish that henry has presently,i.e. goldfish & guppies, is $355.30. given that the cost of each goldfish is the same,
    a)find the initial number of goldfish in tank A
    b)find the total cost of all the guppies.
  3. a particular disc can be made to rotate at 2 different speeds. if it is made to rotate slower by 135 revolutions per hour, it wld require an additional 2.7 hour to make 315 revolutions. find the higher speed at which it can operate.

Penny Nom lui répond.
12*nC2 = n! 2003-03-30
A tutor pose la question :
Solve for "N"

12*nC2=N!

Walter Whiteley lui répond.
The vertex of a cone 2003-03-27
Holly pose la question :
I read your response to Callie about whether a cone has a vertex or not. Is it ONLY a vertex if both halves of the cone are together or can one half of the illustration have a vertex?
Walter Whiteley lui répond.
Can twice a square be a square? 2003-03-25
Mike pose la question :
The other day it occurred to some students that they could think of no square number which is an integer, which can be divided into two equal square numbers which are intergers, Or put another way, no squared integer when doubled can equal another square integer. For example 5 squared plus 5 squared is 50, but 50 is not a square number.
Walter Whiteley and Claude Tardif lui répond.
A royal flush 2003-03-24
Vikki pose la question :

A poker hand consists of 5 cards selected randomly from an ordinary deck of cards: find the probability of a ROYAL FLUSH : the 10 , jack, queen,king and ace of the same suit.

I was thinking somewhere along the lines of:

*the number of ways to get the suit is 4C1
*the number of ways to get a 10 out of the 13 cards etc....
...but Im not sure I am going about this the right way, could you help?


Andrei Volodin lui répond.
Friends and enemies 2003-03-24
Becky pose la question :

Consider a room that contains six people. Any two people are either friends of each other, or they are enemies.

A. Argue why there are three people, all who are friends, or there are at least three people, all who are enemies

B. Rephrase the situation using graph terminology, using all of these terms correctly: vertex, edge, graph, complement, clique, independent set, and bipartite.


Penny Nom lui répond.
 
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