72 articles trouvés pour ce sujet.
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Solving an inequality |
2020-10-18 |
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nunya pose la question :
3(4 + 2n) > 2n - 16
Penny Nom lui répond. |
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The area of a patio |
2019-06-23 |
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Miguel pose la question :
Stephanie has 60 feet of metal fencing material to only fence 3
sides of a rectangular patio. A tall metal wall serves as the fourth side
of the rectangle. write a function for the area the garden (A) in terms
of width in feet (x) What measures of the width would give an area of
at least 150 feet?
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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An inequality |
2015-04-19 |
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mr. pose la question :
Simplify the inequality √x>x and represent on a number line
Penny Nom lui répond. |
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An inequality |
2014-03-27 |
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James pose la question :
a step on a stairway is at least 8 inches high. write and solve an inequality to represent the maximum number of steps between floors that are 10 feet apart
Penny Nom lui répond. |
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An inequality |
2014-01-25 |
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LANELL pose la question :
this is a problem to solve: 1/3 + 2/7 >=x/21 -- part of the answer is (-oo)
not exactly that similar--it is on a calculator as a symbol- sure you know what it is I am talking about- the x will be a number
Penny Nom lui répond. |
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An inequality |
2014-01-17 |
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Rosie pose la question :
4x/x-2<3
four x divided by x-2 is less than or equal to 3
Penny Nom lui répond. |
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When would one flip the inequality sign? |
2014-01-09 |
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Natasha pose la question :
Would one flip the inequality symbol in this equation: (explain why)
(-9a)/(-9) > 81
And please explain in what circumstances one would flip the inequality sign
THANKS!
Penny Nom lui répond. |
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Changing the sign of an inequality |
2012-09-19 |
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Bryauna pose la question :
Why do you change the signs in inequalities?!
Penny Nom lui répond. |
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A cubic inequality |
2012-03-25 |
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Victoria pose la question :
The flight path of a bumblebee above the ground can be modelled by the function f(x)= 2x^3- 17x^2+ 11x + 130. Where x is the time in seconds and f(x) represents the height in inches above the ground. The entrance to the bee's hive is located 100 inches above the ground. Determine when the bumblebee's height is greater than 100 inches. The bee's height was monitored from 0 to 25 seconds inclusive. (over the domain 0
Penny Nom lui répond. |
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An inequality |
2010-12-13 |
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jimmy pose la question :
1.7b-1.1 <2.3
Stephen La Rocque lui répond. |
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Graphing a linear inequality |
2010-05-26 |
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Valeie pose la question :
When graphing a linear inequality, how do you know if the inequality represents the area above the line.
Penny Nom lui répond. |
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Which values of x satisfy (x-2) / (x+4) <7 |
2010-05-23 |
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Rocco pose la question :
Which values of x satisfy (x-2) / (x+4) <7
Harley Weston lui répond. |
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Frank makes picture frames |
2010-02-20 |
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Carol pose la question :
Frank makes picture frames his revenue from sales is R=$13.60x for frames sold. The cost making frames is C=$5.80x+$120 for frames made. What is the minum number of frames Frank must make and sell in order for his revenue to be greater than his costs.
Penny Nom and Melanie Tyrer lui répond. |
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1/a + 1/b + 1/c < 1 |
2010-02-01 |
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Mrityun pose la question :
suppose a,b and c are natural numbers such that 1/a + 1/b + 1/c < 1. Prove that
1/a + 1/b + 1/c < = 41/42.
Penny Nom and Claude Tardif lui répond. |
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The triangle inequality |
2010-01-11 |
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Nazrul pose la question :
If A and B are any two vectors, then how can I prove that magnitude of (A+B)<=magnitude of A+magnitude of B. Please show me the process in details. Thank you.
Robert Dawson lui répond. |
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e^pi and pi^e |
2009-10-22 |
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Natalie pose la question :
Question from natalie, a student:
Without using your calculator, prove which is bigger: e^pi or pi^e
we talked about ad absurdum in class, so I'm assuming that is how I approach this question, but since neither of them have a variable( like the examples we actually solved in class), I'm not quite sure how to solve it....
Harley Weston lui répond. |
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2(x-4)>-4+2x |
2009-08-27 |
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jorna pose la question :
2(x-4)>-4+2x
Penny Nom lui répond. |
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Things equal to the same thing |
2009-07-29 |
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nazrul pose la question :
If p^2-pa+q=0 and m^2-ma+n=0 , can we write p^2-pa+q= m^2-ma+n? Please explain.
Robert Dawson lui répond. |
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Inequalities Proof |
2009-07-24 |
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ABOU pose la question :
good morning.......a b c are real positive no zero......proof that
sq root(2a/(a+b))+sq root(2b/(b+c))+sq root(2c/(c+a))inferior or equal 3
thank you
Janice Cotcher lui répond. |
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Properties of Inequality |
2009-06-05 |
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Nazrul pose la question :
We know that if a>b then (1/a)<(1/b)
But why 5> -2 implies (1/5)>(1/-2) .
Thank you in advance for your help.
Robert J. Dawson lui répond. |
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|1/(x+1)| <1 |
2009-05-16 |
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Nazrul pose la question :
What is the solution of absolute value of (1/(x+1))<1? Please explain.
Stephen La Rocque lui répond. |
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An inequality with logs |
2009-03-06 |
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Indrajit pose la question :
(x/10)^(logx - 2)<100..........how to solve this one??
Stephen La Rocque lui répond. |
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Solving an equality |
2009-02-10 |
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Deborah pose la question :
2(v+10)<18
Penny Nom lui répond. |
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Solving an inequality |
2009-01-02 |
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jarred pose la question :
3x+8>2
Penny Nom lui répond. |
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-5x < 25+10 |
2008-04-25 |
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Courtney pose la question :
What is the answer to -5x<25+10
Stephen La Rocque lui répond. |
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The isoperimetric inequality |
2008-04-21 |
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Dutch pose la question :
I'm searching for the proof that the sphere has the smallest volume of any figure and maximizes the volume of any figure.
Chris Fisher lui répond. |
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Two consecutive odd numbers |
2008-04-01 |
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prinsilla pose la question :
of all pairs of consecutive odd integers whose sum is greater than 75. find the pair whose sum is least?
Stephen La Rocque lui répond. |
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A fractional inequality |
2008-02-20 |
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ed pose la question :
solve the inequality
(x+3)^2 (2-x)
___________ < 0
(x+4) (x^2 - 4)
Penny Nom lui répond. |
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Multiplying an inequality by a negative number |
2007-11-27 |
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Lisa pose la question :
Why is it that you have to switch the sign of the inequality when you divide or multiply by an negative number to solve for a variable?
Penny Nom and Walter Whiteley lui répond. |
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Equality of sets |
2007-07-23 |
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Mac pose la question :
Hi, I learnt set theory recently. My teacher and few of the weblink actually give different
definition for basic set. Can you please solve this ?
My teacher says, {1,2,3} and {1,1,2,3} is also set.
But in this link http://library.thinkquest.org/C0126820/setsubset.html it says,
"A set has no duplicate elements. An element is either a member of a set or not. It cannot be in the set twice."
and "{1, 2, 3} is the same as the set {1, 3, 2, 3, 1}"
My question is,
1. Whether duplicates allowed in the set or not ?
2. Even if the duplicates are allowed, {1,2,3} and {1,1,2,2,3,3} are same or not ?
Penny Nom and Harley Weston lui répond. |
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An inequality |
2007-06-16 |
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jerry pose la question :
Two real numbers a and b satisfy the equation ab=1.
i) Prove that a^6 + 4b^6 >4
ii) Find out whether the inequality a^6 + 4b^6 >4 holds for all a and b such that ab = 1
Stephen La Rocque lui répond. |
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Altitudes of scalene triangles |
2007-05-17 |
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Chris pose la question :
Two of the altitudes of a scalene triangle ABC have length 4 and 12.
If the length of the third altitude is also an integer, what is the biggest
that it can be?
J. Chris Fisher lui répond. |
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3x > -12 |
2007-01-11 |
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Jen pose la question :
In the following inequality, would one flip the inequality symbol?
3x > -12
Stephen La Rocque lui répond. |
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x + 2y < 6 |
2007-01-06 |
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Mike pose la question :
I understand solving by graphing, but i am having trouble with the graphing of in equalities. i solved : x + 2y<6
Penny Nom lui répond. |
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The proof of inequality by mathematical induction |
2006-12-07 |
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Carol pose la question :
S(n) = 2^n > 10n+7 and n>=10
Stephen La Rocque lui répond. |
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Linear inequalities |
2006-12-01 |
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Susan pose la question :
how would I graph a linear inequality of y>3.
Stephen La Rocque lui répond. |
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2x > -6 and x - 4 < 3 |
2006-11-27 |
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Alyssa pose la question :
2x > -6 and x - 4 < 3 , i need to know how to solve it and how to graph it.
Stephen La Rocque lui répond. |
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Inequalities |
2006-10-03 |
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Maleeha pose la question :
a)Use algebra to find the set of values of 'x' for which x(x-5)>36.
b)Using your answer to part a, find the set of values 'y' for which y2(y2-5)>36
Penny Nom lui répond. |
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Graphing a linear inequality |
2005-08-26 |
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Gina pose la question :
When graphing a linear inequality, how do you know if the inequality represents the area above the line?
Penny Nom lui répond. |
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Which number is greater? |
2005-08-18 |
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Dante pose la question :
Which number is greater: 888....88 X 333...33 or 444.......44 x 666........67 (each of the numbers has 1989 digits)?
Claude Tardif lui répond. |
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Which is larger, 31^11 or 17^14? |
2005-05-29 |
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Linda pose la question :
Which number is greater 3111 or 1714 (without using
calculator).
Chris Fisher and Paul Betts lui répond. |
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Graphing an inequality |
2005-05-02 |
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Janice pose la question :
I need to know how to graph inequalities. I need to know just abot everything. From graphing an equation to shading.
Leeanne Boehm lui répond. |
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An inequality |
2005-03-31 |
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Ambross pose la question :
demostrate the following inequality:
2.Sqrt(K+1)-2.Sqrt(k)<1/Sqrst(K)<2.Sqrt(K)-2.Sqrt(k-1)
Penny Nom lui répond. |
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Graphing inequalities |
2005-02-15 |
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Melanie pose la question :
Solve and Graph the following variable inequalities:
y<2x+4
y>-2x+6
3x+4y<-24
4x-6y>-24
Penny lui répond. |
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An ineqlality with absolute values |
2004-07-05 |
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Uneeza pose la question :
abs(x2 - 4x) > 3
Claude Tardif lui répond. |
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Solving inequalities |
2004-05-03 |
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Joe pose la question :
Let x be a real number find and graph the solution to the following sentances:
2x-10+9
4X+2<15
5X+3>(x-1)
Peny Nom lui répond. |
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Inequalities |
2004-01-08 |
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Michael pose la question :
How do you use inequalities in your job and in your everyday life?
Penny Nom lui répond. |
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An inequality whose solution is all points |
2003-11-25 |
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Katie pose la question :
Hi my name is Katie and I am in the 9th grade and I would like help on this question. Is it possible to have a system of inequalities whose solution is all points?
1.I need to know why (explanation)
2.how to do it(example)
Penny Nom lui répond. |
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Equal ratios |
2003-11-07 |
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A student pose la question :
In the ratio 3:8=17__, can__be a whole number?
Penny Nom lui répond. |
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Cathy's Clothing |
2003-07-15 |
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Cathy pose la question :
I am supposed to write a practical and useful word problem that would use the following algebriac inequality to solve it: 12x + 25 > 15x + 10. State the quanity that represents x and solve the inequality.
Penny Nom lui répond. |
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A fractional inequality |
2003-04-08 |
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Jessica pose la question :
Solve for x. Write in interval notation.
[(x2)-9]/[x-5] >= 0
Penny Nom lui répond. |
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y < 2x + 1 |
2003-03-01 |
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Erika pose la question :
how can I solve and graph y<2x+1 and which side in the graph should i shade after i finish solving my inequality?
Penny Nom lui répond. |
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Three algebra problems |
2002-10-13 |
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Veronica pose la question :
Solve the following inequality: 5(xsqured-4)/(xto the 5th(2x-5)to the 3rd) < or equal 0 Solve the following equations for all roots square root of x+2=-1+square root of 2x+3 what's ZERO FACTOR PROPERTY??? The hypotenuse of an isosceles right triangle is 7cm. long. Determine the lenghts of the other sides.
Leeanne Boehm lui répond. |
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When does an inequality represent the area above the line? |
2002-08-25 |
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Tamara pose la question :
How do you determine that an inequality represents the area above the line and when do you include the line in the solution?
Penny Nom lui répond. |
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Some inequalities |
2002-07-25 |
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A student pose la question :
1)-5 <= -3X+1 < 1 2)4X-2 < 6 OR X+2 > 9
Penny Nom lui répond. |
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Inequalities |
2001-11-13 |
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Pat pose la question :
When writing the solution to an inequality, why is the solution written in set notation? {x/ }
Penny Nom lui répond. |
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Why do you flip the inequality sign? |
2001-10-26 |
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Sean pose la question :
I have a question about an inequality problem. Here it is: Solve and graph 5 - 3x => 17. (=> is greater than or equal). Please tell me why you flip the inequality sign when divinding by a negative number.
Penny Nom lui répond. |
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The triangle inequality |
2001-09-27 |
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A student pose la question :
__ __ __
Prove that AX + XB = AB for any X on AB.
Chris fisher lui répond. |
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A linear inequality |
2001-09-17 |
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Eric pose la question :
How can I solve |x + y| + |x - y|< =6?
Penny Nom lui répond. |
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An inequality involving triangles |
2001-06-12 |
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Sandra pose la question :
The triangle inequality guarantees that the sum of the lengths of two sides of a triangle is greater than the length of the third. As a consequence, if x and y are legs of a right triangle, with x less than or equal to y, and z the hypotenuse, then x + y is greater than z, so x is greater than z - y. Under what circumstances will x is greater than 2(z - y) be true?
Chris Fisher and Penny Nom lui répond. |
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Two inequalities |
2001-02-12 |
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A student pose la question :
If 3
Leeanne Boehm lui répond. |
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Which fraction is greater? |
2001-02-01 |
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Carol pose la question :
Hello My name is Carol I am a student teacher! I am asked to aproach these students on their problems. I am unsure of how to explain to them that these are wrong. Can you help? Thanks. Iris claims that if we have two positive rational numbers, the one with the greatest numerator is the greatest. Shirly claim that if we have two positive rational numbers, the one with the greatest denominator is the least. Thanks!
Claude Tardif lui répond. |
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A problem with distance |
2001-01-16 |
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A student pose la question :
For what values of a is the distance between P(a, 3) and Q(5, 2a) greater than the square root of 26.
Penny Nom lui répond. |
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Inequalities |
2000-09-02 |
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Jennifer pose la question :
I would like some help with equations and inequalities. My first inequality is 3p-6>21 and 3q+11+8q>99.
Paul Betts lui répond. |
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Graphing an inequality |
2000-08-02 |
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Lori pose la question :
How do I find x and y and graph this problem 3x + y < 5
Penny Nom lui répond. |
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Why are equivalent fractions equal? |
2000-04-05 |
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An elementary student pose la question :
What is the mathematical reason equivalent fractions are equal?
Penny Nom lui répond. |
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|6-2x|<4 |
1999-10-20 |
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Tchilco pose la question :
Solve |6-2x|<4
Harley Weston lui répond. |
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Standard Deviation |
1999-07-11 |
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Anthony Fama pose la question :
I have seen several answers to this question: If one standard deviation represents 68% of the population, what does two, three, four and five sigma [std deviation] represent? As stated, I have seen several different answers and thus, the impetus for my question.
Harley Weston lui répond. |
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Reversing the direction of an inequality. |
1999-03-06 |
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Mallory White pose la question :
If the Problem was -4a plus -5 is less than or equal to 14, why would you change the sign to greater than or equal to?
Jack LeSage and Harley Weston lui répond. |
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Graphing Inequalities of Conic Sections |
1997-03-24 |
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James Sheldon pose la question :
I'm trying to graph Systems of Conic Sections with inequalities, but I'm running into problems on which area to shade:
x^2+y^2 is greater than or equal to 16
xy > 4 So I graph these two equations, and then my teacher said to substitute a point into it but I'm still not sure how to do it...
Penny Nom lui répond. |
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How do you graph these inequalities? |
1996-05-17 |
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Robert pose la question :
How do you graph the inequalities 5+gg, and g+h>6 on one coordinate plane?
Harley Weston and Maxine Stinka lui répond. |
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