68 items are filed under this topic.
 |
|
|
|
|
|
|
|
|
Solving an inequality |
2020-10-18 |
|
From nunya:
3(4 + 2n) > 2n - 16
Answered by Penny Nom. |
|
|
|
|
|
|
The area of a patio |
2019-06-23 |
|
From Miguel:
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?
Answered by Penny Nom. |
|
|
|
|
|
|
An inequality with no solution |
2018-09-20 |
|
From Alena:
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.
Answered by Penny Nom. |
|
|
|
|
|
|
An inequality |
2015-04-19 |
|
From mr.:
Simplify the inequality √x>x and represent on a number line
Answered by Penny Nom. |
|
|
|
|
|
|
An inequality |
2014-03-27 |
|
From James:
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
Answered by Penny Nom. |
|
|
|
|
|
|
An inequality |
2014-01-25 |
|
From LANELL:
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
Answered by Penny Nom. |
|
|
|
|
|
|
An inequality |
2014-01-17 |
|
From Rosie:
4x/x-2<3
four x divided by x-2 is less than or equal to 3
Answered by Penny Nom. |
|
|
|
|
|
|
When would one flip the inequality sign? |
2014-01-09 |
|
From Natasha:
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!
Answered by Penny Nom. |
|
|
|
|
|
|
Changing the sign of an inequality |
2012-09-19 |
|
From Bryauna:
Why do you change the signs in inequalities?!
Answered by Penny Nom. |
|
|
|
|
|
|
A cubic inequality |
2012-03-25 |
|
From Victoria:
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
Answered by Penny Nom. |
|
|
|
|
|
|
An inequality |
2010-12-13 |
|
From jimmy:
1.7b-1.1 <2.3
Answered by Stephen La Rocque. |
|
|
|
|
|
|
Graphing a linear inequality |
2010-05-26 |
|
From Valeie:
When graphing a linear inequality, how do you know if the inequality represents the area above the line.
Answered by Penny Nom. |
|
|
|
|
|
|
Which values of x satisfy (x-2) / (x+4) <7 |
2010-05-23 |
|
From Rocco:
Which values of x satisfy (x-2) / (x+4) <7
Answered by Harley Weston. |
|
|
|
|
|
|
Frank makes picture frames |
2010-02-20 |
|
From Carol:
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.
Answered by Penny Nom and Melanie Tyrer. |
|
|
|
|
|
|
1/a + 1/b + 1/c < 1 |
2010-02-01 |
|
From Mrityun:
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.
Answered by Penny Nom and Claude Tardif. |
|
|
|
|
|
|
The triangle inequality |
2010-01-11 |
|
From Nazrul:
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.
Answered by Robert Dawson. |
|
|
|
|
|
|
e^pi and pi^e |
2009-10-22 |
|
From Natalie:
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....
Answered by Harley Weston. |
|
|
|
|
|
|
2(x-4)>-4+2x |
2009-08-27 |
|
From jorna:
2(x-4)>-4+2x
Answered by Penny Nom. |
|
|
|
|
|
|
Inequalities Proof |
2009-07-24 |
|
From ABOU:
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
Answered by Janice Cotcher. |
|
|
|
|
|
|
Properties of Inequality |
2009-06-05 |
|
From Nazrul:
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.
Answered by Robert J. Dawson. |
|
|
|
|
|
|
|1/(x+1)| <1 |
2009-05-16 |
|
From Nazrul:
What is the solution of absolute value of (1/(x+1))<1? Please explain.
Answered by Stephen La Rocque. |
|
|
|
|
|
|
An inequality with logs |
2009-03-06 |
|
From Indrajit:
(x/10)^(logx - 2)<100..........how to solve this one??
Answered by Stephen La Rocque. |
|
|
|
|
|
|
Solving an equality |
2009-02-10 |
|
From Deborah:
2(v+10)<18
Answered by Penny Nom. |
|
|
|
|
|
|
Solving an inequality |
2009-01-02 |
|
From jarred:
3x+8>2
Answered by Penny Nom. |
|
|
|
|
|
|
-5x < 25+10 |
2008-04-25 |
|
From Courtney:
What is the answer to -5x<25+10
Answered by Stephen La Rocque. |
|
|
|
|
|
|
The isoperimetric inequality |
2008-04-21 |
|
From Dutch:
I'm searching for the proof that the sphere has the smallest volume of any figure and maximizes the volume of any figure.
Answered by Chris Fisher. |
|
|
|
|
|
|
Two consecutive odd numbers |
2008-04-01 |
|
From prinsilla:
of all pairs of consecutive odd integers whose sum is greater than 75. find the pair whose sum is least?
Answered by Stephen La Rocque. |
|
|
|
|
|
|
A fractional inequality |
2008-02-20 |
|
From ed:
solve the inequality
(x+3)^2 (2-x)
___________ < 0
(x+4) (x^2 - 4)
Answered by Penny Nom. |
|
|
|
|
|
|
Multiplying an inequality by a negative number |
2007-11-27 |
|
From Lisa:
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?
Answered by Penny Nom and Walter Whiteley. |
|
|
|
|
|
|
An inequality |
2007-06-16 |
|
From jerry:
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
Answered by Stephen La Rocque. |
|
|
|
|
|
|
Altitudes of scalene triangles |
2007-05-17 |
|
From Chris:
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?
Answered by J. Chris Fisher. |
|
|
|
|
|
|
3x > -12 |
2007-01-11 |
|
From Jen:
In the following inequality, would one flip the inequality symbol?
3x > -12
Answered by Stephen La Rocque. |
|
|
|
|
|
|
x + 2y < 6 |
2007-01-06 |
|
From Mike:
I understand solving by graphing, but i am having trouble with the graphing of in equalities. i solved : x + 2y<6
Answered by Penny Nom. |
|
|
|
|
|
|
The proof of inequality by mathematical induction |
2006-12-07 |
|
From Carol:
S(n) = 2^n > 10n+7 and n>=10
Answered by Stephen La Rocque. |
|
|
|
|
|
|
Linear inequalities |
2006-12-01 |
|
From Susan:
how would I graph a linear inequality of y>3.
Answered by Stephen La Rocque. |
|
|
|
|
|
|
2x > -6 and x - 4 < 3 |
2006-11-27 |
|
From Alyssa:
2x > -6 and x - 4 < 3 , i need to know how to solve it and how to graph it.
Answered by Stephen La Rocque. |
|
|
|
|
|
|
Inequalities |
2006-10-03 |
|
From Maleeha:
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
Answered by Penny Nom. |
|
|
|
|
|
|
Graphing a linear inequality |
2005-08-26 |
|
From Gina:
When graphing a linear inequality, how do you know if the inequality represents the area above the line?
Answered by Penny Nom. |
|
|
|
|
|
|
Which number is greater? |
2005-08-18 |
|
From Dante:
Which number is greater: 888....88 X 333...33 or 444.......44 x 666........67 (each of the numbers has 1989 digits)?
Answered by Claude Tardif. |
|
|
|
|
|
|
Which is larger, 31^11 or 17^14? |
2005-05-29 |
|
From Linda:
Which number is greater 3111 or 1714 (without using
calculator).
Answered by Chris Fisher and Paul Betts. |
|
|
|
|
|
|
Graphing an inequality |
2005-05-02 |
|
From Janice:
I need to know how to graph inequalities. I need to know just abot everything. From graphing an equation to shading.
Answered by Leeanne Boehm. |
|
|
|
|
|
|
An inequality |
2005-03-31 |
|
From Ambross:
demostrate the following inequality:
2.Sqrt(K+1)-2.Sqrt(k)<1/Sqrst(K)<2.Sqrt(K)-2.Sqrt(k-1)
Answered by Penny Nom. |
|
|
|
|
|
|
Graphing inequalities |
2005-02-15 |
|
From Melanie:
Solve and Graph the following variable inequalities:
y<2x+4
y>-2x+6
3x+4y<-24
4x-6y>-24
Answered by Penny. |
|
|
|
|
|
|
An ineqlality with absolute values |
2004-07-05 |
|
From Uneeza:
abs(x2 - 4x) > 3
Answered by Claude Tardif. |
|
|
|
|
|
|
Solving inequalities |
2004-05-03 |
|
From Joe:
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)
Answered by Peny Nom. |
|
|
|
|
|
|
Inequalities |
2004-01-08 |
|
From Michael:
How do you use inequalities in your job and in your everyday life?
Answered by Penny Nom. |
|
|
|
|
|
|
An inequality whose solution is all points |
2003-11-25 |
|
From Katie:
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)
Answered by Penny Nom. |
|
|
|
|
|
|
Cathy's Clothing |
2003-07-15 |
|
From Cathy:
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.
Answered by Penny Nom. |
|
|
|
|
|
|
A fractional inequality |
2003-04-08 |
|
From Jessica:
Solve for x. Write in interval notation.
[(x2)-9]/[x-5] >= 0
Answered by Penny Nom. |
|
|
|
|
|
|
y < 2x + 1 |
2003-03-01 |
|
From Erika:
how can I solve and graph y<2x+1 and which side in the graph should i shade after i finish solving my inequality?
Answered by Penny Nom. |
|
|
|
|
|
|
Three algebra problems |
2002-10-13 |
|
From Veronica:
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.
Answered by Leeanne Boehm. |
|
|
|
|
|
|
When does an inequality represent the area above the line? |
2002-08-25 |
|
From Tamara:
How do you determine that an inequality represents the area above the line and when do you include the line in the solution?
Answered by Penny Nom. |
|
|
|
|
|
|
Some inequalities |
2002-07-25 |
|
From A student:
1)-5 <= -3X+1 < 1 2)4X-2 < 6 OR X+2 > 9
Answered by Penny Nom. |
|
|
|
|
|
|
Inequalities |
2001-11-13 |
|
From Pat:
When writing the solution to an inequality, why is the solution written in set notation? {x/ }
Answered by Penny Nom. |
|
|
|
|
|
|
Why do you flip the inequality sign? |
2001-10-26 |
|
From Sean:
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.
Answered by Penny Nom. |
|
|
|
|
|
|
The triangle inequality |
2001-09-27 |
|
From A student:
__ __ __
Prove that AX + XB = AB for any X on AB.
Answered by Chris fisher. |
|
|
|
|
|
|
A linear inequality |
2001-09-17 |
|
From Eric:
How can I solve |x + y| + |x - y|< =6?
Answered by Penny Nom. |
|
|
|
|
|
|
An inequality involving triangles |
2001-06-12 |
|
From Sandra:
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?
Answered by Chris Fisher and Penny Nom. |
|
|
|
|
|
|
Two inequalities |
2001-02-12 |
|
From A student:
If 3
Answered by Leeanne Boehm. |
|
|
|
|
|
|
Which fraction is greater? |
2001-02-01 |
|
From Carol:
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!
Answered by Claude Tardif. |
|
|
|
|
|
|
A problem with distance |
2001-01-16 |
|
From A student:
For what values of a is the distance between P(a, 3) and Q(5, 2a) greater than the square root of 26.
Answered by Penny Nom. |
|
|
|
|
|
|
Inequalities |
2000-09-02 |
|
From Jennifer:
I would like some help with equations and inequalities. My first inequality is 3p-6>21 and 3q+11+8q>99.
Answered by Paul Betts. |
|
|
|
|
|
|
Graphing an inequality |
2000-08-02 |
|
From Lori:
How do I find x and y and graph this problem 3x + y < 5
Answered by Penny Nom. |
|
|
|
|
|
|
|6-2x|<4 |
1999-10-20 |
|
From Tchilco:
Solve |6-2x|<4
Answered by Harley Weston. |
|
|
|
|
|
|
Standard Deviation |
1999-07-11 |
|
From Anthony Fama:
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.
Answered by Harley Weston. |
|
|
|
|
|
|
Reversing the direction of an inequality. |
1999-03-06 |
|
From Mallory White:
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?
Answered by Jack LeSage and Harley Weston. |
|
|
|
|
|
|
Graphing Inequalities of Conic Sections |
1997-03-24 |
|
From James Sheldon:
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...
Answered by Penny Nom. |
|
|
|
|
|
|
How do you graph these inequalities? |
1996-05-17 |
|
From Robert:
How do you graph the inequalities 5+gg, and g+h>6 on one coordinate plane?
Answered by Harley Weston and Maxine Stinka. |
|
|
