54 articles trouvés pour ce sujet.
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Résolution d'une équation |
2010-02-25 |
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sellin pose la question :
Il faut que j'exprime x en fonction de m dans l'équation suivante et je n'y arrive pas:
-3x + 1 = (m-1) / 2 * x + (2m + 3) / 5
Claude Tardif lui répond. |
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Resolution of the equation f(x)=0 |
2000-04-01 |
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Naoufal pose la question :
How can i evalf the equation f(x)=0 with f function . Can you ansear me in french thank you very much
Claude Tardif lui répond. |
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Can one equation with two variables be solved algebraically? |
2019-08-30 |
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Don pose la question :
Can one equation with two variables be solved algebraically?
Penny Nom lui répond. |
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How many solutions does 3 (x + 4) = 3 x + 4 have? |
2018-12-01 |
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Milan pose la question :
how many solutions does 3 (x + 4) = 3 x + 4 have?
Penny Nom lui répond. |
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An inequality with no solution |
2018-09-20 |
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Alena pose la question :
I'm trying to help with a homework problem. Can you please help me?
2kx - 3k < 2x + 4 +3kx
We are solving for "k" with no solution.
Penny Nom lui répond. |
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A sulphuric acid solution |
2018-07-12 |
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Tan pose la question :
How much 96% h2so4 to add into sulphuric acid 30% in order to make it to 50% sulphuric acid?
Penny Nom lui répond. |
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Extraneous solutions |
2015-03-07 |
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Emily pose la question :
I have a question about Extraneous Solutions, Because I was recently researching to figure out
on how to determine that a solution is extraneous and many of the answers talked about how if a answer is negative
that it should always be extraneous but now I found out that positive solutions can also be considered as extraneous solutions
so that is why I am really confused Extraneous Solution's.
I would really appreciate it if you could clearly explain to me how to determine an extraneous solution from a normal solution.
Thanks,
Emily
Chris Fisher lui répond. |
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One zero to a quadratic expression |
2014-10-06 |
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Kevin pose la question :
Find a value of n such that f(x) = 3^x2 + nx + 6 only has one zero, is this the only solution to the question?
Penny Nom lui répond. |
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A 7% solution |
2014-01-14 |
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imran pose la question :
what amount of H2SO4 should be added to make 5mL of 0.7% H2SO4 solution
Penny Nom lui répond. |
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Extraneous solutions |
2013-10-22 |
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tom pose la question :
i need an equation where x=-2 is the correct answer and x=-3 is an extraneous solution. can you provide me with such an equation??
Harley Weston lui répond. |
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Dilution of concentrated acid |
2013-07-31 |
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Adom pose la question :
I have 500mls of 90% conc. of an acid. Now I need to prepare 20% concentration from this (say 100mls of this). How much of the stock solution do I take and how much water to add? Thanks!
Penny Nom lui répond. |
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Extraneous solutions |
2013-02-18 |
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Eileen pose la question :
(5x+4)^1/2-3x=0
Penny Nom lui répond. |
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A 25% sulfuric acid solution |
2012-05-03 |
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Scott pose la question :
In order to make a 25% solution with 96% Sulfuric Acid, how much of the Sulfuric do I add to DI water to make up 2000ml??
Penny Nom lui répond. |
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Extraneous solutions |
2010-05-22 |
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Joe pose la question :
Question from Joe, a parent:
w+3 2w
----- - ----- = 1
w2-1 w-1
W2 is = w squared
-4
The answer is w= ------
3
but have no idea how this was solved. any help is appreciated. Thanks.
Penny Nom lui répond. |
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A rectangle problem |
2010-04-12 |
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Charlene pose la question :
The ratio of the width to the length of a certain rectangle is equal to the ratio of its length to the difference between its length and twice its width. If the area of the rectangle is 25cm^2, then what are its dimensions? Present a non- algebraic solution?
Tyler Wood lui répond. |
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Redwood Park and Glendale Park |
2010-03-05 |
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Shaun pose la question :
Question from Shaun, a student:
Redwood and Glendale Parks are each surrounded by 100 yards of
fencing. The are of Redwood Park is 25 square yards more than the area
of Glendale Park. If both parks are rectangles, what is the measurement
of each rectangle?
Harley Weston lui répond. |
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Find the intersection of y=x-1 and y=sin(x) |
2009-10-10 |
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Usama pose la question :
There are many modern calculators and softwares that can plot the functions.
I have two very simple equations y=x-1 and y=sin(x), if i draw them manually on paper i can not get the accurate value.
But i think a computer can easily draw perfect straight and curve lines so it should be easy to find the intersection point of two lines.
Is there any way or software that can tell the exact value of intersection point of two lines?
Robert Dawson and Harley Weston lui répond. |
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A solution of 45% acetic acid |
2009-09-28 |
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Autumn pose la question :
if a chemist has a 4 liter solution that consists of 90% acetic acid, how much water does he need to produce a solution of 45% acetic acid?
Penny Nom lui répond. |
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Extraneous solutions |
2009-09-20 |
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iyana pose la question :
what is an extraneous solution? what must you do to determine whether a extraneous solution?
Stephen La Rocque and Harley Weston lui répond. |
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Percentage of Acid |
2009-07-17 |
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Leeanne pose la question :
here is my question:
a chemist has 200 liters of solution that is 5% acid. how many liters of water
(0% acid) must he add to make a solution that is 4% acid?
Stephen La Rocque lui répond. |
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Extraneous solutions |
2009-06-02 |
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Ayana pose la question :
solve and check for extraneous solutions.
3x+6/ x²-4 = x+1/ x-2
x can not = {-2,2}
Penny Nom lui répond. |
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An infinite number of solutions |
2009-03-24 |
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Sean pose la question :
this is a linear equations problem;
first:
3535.5 + Fbd (.866) + Fbc (.5) - Fab (.5) = 0
and
-3535.5 - Fab (.866) - Fbc (.5) - Fbd (.5) = 0
Harley Weston lui répond. |
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Linear systems |
2009-02-20 |
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Rose pose la question :
I have been having trouble trying to figure out these three math problems , I need help breaking them down so I could understand them better please help.
1. x = 7 - x
2 x - y + 8
2. 8 x + 5 y = 1 8 4
x - y = 3
3. y + 2 x = 3
y + 2 x = 4
I can't figure out how to break them down in the right order.
Penny Nom lui répond. |
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A 10% salt solution |
2009-01-12 |
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Joanna pose la question :
How many liters of water must evaporate from 40 liters of a 10% salt solution to make a 25% salt solution?
Robert Dawson and Penny Nom lui répond. |
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A quadratic |
2008-10-27 |
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Giselle pose la question :
3x squared minus 2x equals -5
Penny Nom lui répond. |
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The ratio of two chemicals |
2008-10-20 |
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Nathan pose la question :
if there is a chemical mixture of 5:2 and the total amount of the entire solution is 1400 gallons, how many gallons make up the stronger side of the solution? I believe the answer is 1,000 but I figured it out in a non-traditional way so I wanted to understand the basic formula used to determine these types of questions.
thank you
Penny Nom lui répond. |
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A different approach to a word problem |
2008-10-03 |
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Kenneth pose la question :
Sarah's age is 2/3 of Mary's age and 3/4 of Ruth's age. The sum of their ages is 46 years. How old is each?
Penny Nom lui répond. |
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Extraneous solutions |
2008-09-25 |
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crystal pose la question :
/6x+7/=5x+2
Penny Nom lui répond. |
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algebra |
2008-07-31 |
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Eric pose la question :
Would you please solve & explain this equation to me: x^2+2x=x(x+2)?
Thank you
Penny Nom & Stephen La Rocque lui répond. |
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A inear system |
2008-02-03 |
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Kelly pose la question :
is (-1,5) a solution of each system? y=-x+4 y=-1/5x
Penny Nom lui répond. |
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A linear system |
2008-01-22 |
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Lisa pose la question :
I am supposed to use augmented matrices to solve this system of equations. x - 3y = 5; 4x - 12y = 13. I think it is unsolvable but I want to be sure I am not just giving up. Thanks in advance for your help! Lisa.
Stephen La Rocque and Brennan Yaremko lui répond. |
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Number of real solutions |
2007-10-05 |
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Sujith pose la question :
The no of real solutions of the equations 1+x+x^2+x^3 = x^4+x^5 is ?
Harley Weston lui répond. |
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Two equations in two unknowns |
2007-09-22 |
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Mary pose la question :
Having problems doing this problem, looking for a solution with the work. I would like to see how you got your answer, to see what I was doing wrong.
solve using the substitution method, is there "no solution" or "infinitely many solutions"
4x+y=4
2x+8y=0
Stephen La Rocque and Leeanne Boehm lui répond. |
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What feature on a graph shows the solution? |
2007-08-19 |
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San pose la question :
To solve the equation 2sinx+square root 3=0, what feature of the graph,
in the form y=asinx+b would show the solution? Draw a graph to show
the solution. thanks.
Stephen La Rocque lui répond. |
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What happens when you have zero's on both sides? |
2007-06-05 |
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Lily pose la question :
On the substitution method what happens when you have zero's on both
sides of the equation? Is that considered no solution or infinitely many?
Stephen La Rocque and Penny Nom lui répond. |
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No solution to a linear system |
2007-04-09 |
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Ryan pose la question :
When is it possible to get no solution when solving a linear system?
Leeanne Boehm, Steve La Rocque, Penny Nom and Melanie Tyrer lui répond. |
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How many milliliters of solution should be administered |
2006-08-22 |
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Traci pose la question :
If a solution contains 4 percent , how many milliliters of solution should be administered to give a patent 80 grams?
Stephen La Rocque lui répond. |
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Diluting an acid solution |
2006-02-25 |
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Alex pose la question :
IF YOU HAVE 1 Litre OF A 70% ACID SOLUTION, AT WHAT RATIO DO YOU DILUTE IT WITH WATER TO ACHIEVE A 30% AND 50% ACID SOLUTION?
Penny Nom lui répond. |
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Extraneous solutions |
2006-01-01 |
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Liz pose la question :
Question: solve and check for extraneous solution
3(w + 1)1/2 = 6
Penny Nom lui répond. |
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How many pixels are there to an inch? |
2005-10-15 |
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Fred pose la question :
I want to know how many pixels there are to an inch.
Penny lui répond. |
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Extraneous solutions |
2005-02-04 |
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Heather pose la question :
My teacher wants to know why there are extraneous solutions in logarithms?
Penny Nom lui répond. |
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Extraneous solutions |
2004-07-28 |
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Nicole pose la question :
When I have a problem like (2x + 3)/5 = (x + 1)/6 and the question asks to check for extraneous solutions, how do you solve that?
Penny Nom lui répond. |
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Preparing 100ml of a 30% alcohol solution |
2003-07-13 |
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Justin pose la question :
My question is how do you prepare a 100ml of a 30% alcohol solution using 95% alcohol?
Penny Nom lui répond. |
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Extraneous solutions |
2003-01-24 |
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Paul pose la question :
What is an extraneous solution and in what cases do you get one? How do you know it is extraneous?
Penny Nom lui répond. |
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Mixing solutions |
2002-09-13 |
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Margaret pose la question :
In a chemistry laboratory the concentration of one solution is 10% hydrocholoric acid (HCl) and that of a second soulution is 60% HCl. How many mL of each should be mixed to obtain 50 mL of a 30% HCl solution??
Penny Nom lui répond. |
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A solution to an equation |
2002-08-28 |
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A student pose la question :
How do you determine whether a pair of numbers is a solution for an equation? If you could identify the specifics steps I need to take to determine whether it is a solution or not would be appreciated! Thanks i.e. x-4=0 Pairs of numbers as possible solutions (4,7) (3,4) (0,-4).
Penny Nom lui répond. |
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Common solution |
2001-06-02 |
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Samantha pose la question :
- Solve for common solution: x+y=6 2x-3y=2
- Solve for y in terms of x: 3x-y=4
Penny Nom lui répond. |
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The solutions of a quadratic |
2001-01-30 |
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A student pose la question :
- Show that the product of the solutions of ax2 + bx + c = 0 is c/a.
- For each equation under the given condition, (a) find k and
(b) find the other solution. kx2 - 2x + k = 0; one solution is -3
Penny Nom lui répond. |
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Integral solutions |
2000-11-20 |
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David pose la question :
determine all pairs of integers (x,y) which satisfy the equation 6x2 - 3xy - 13x + 5y = -11 I got y= (6x2-13x+11)/(3x-5) and i don't konw how to continue
Claude Tardif lui répond. |
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sin x = x/10 |
1999-10-07 |
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Amandeep Grover pose la question :
Solve the equation sin x = x/10
Harley Weston lui répond. |
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Algebra |
1998-11-25 |
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Casey pose la question :
yeah my son brought home a math worksheet and he was wondering and me too if u could help him and me out . he has problems like this 4n+9=7n+2= ??? and he has to show work so if u could help us out that would be great
Jack LeSage lui répond. |
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A Linear System |
1998-10-08 |
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Jason Bussey pose la question :
The linear systems with the following pattern all have the same solution. Is their some kind of reasoning as to why this is so? 2x+3y=4
3x+4y=5 4x+5y=6
5x+6y=7 The solution is always x=-1, y=2 Thank you
Jason
Penny Nom lui répond. |
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Graph question |
1998-05-12 |
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Rose Seminary pose la question :
Why is the point of intersection of two lines the solution to the corresponding system of equations?
Penny Nom lui répond. |
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Approximating roots. |
1996-11-04 |
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Ben Dixon pose la question :
How do you calculate a square root? eg the square root of 2.There is obviously some sort of successive approximation type algorithm for doing it to however many decimal places is required, but what is the algorithm?
Harley Weston lui répond. |
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