Wednesday

April 16, 2014

April 16, 2014

Number of results: 71

**algebra 2**

They are conic sections. For a more detailed explanation, see: http://math2.org/math/algebra/conics.htm or post what details you need.
*Tuesday, December 15, 2009 at 4:43pm by MathMate*

**math**

Have you considered a Calculus Text? Even a review/study guide? Schuam's College Outline Series, College Calculus is very good. It is available at Barnes Noble. http://math2.org/math/derivatives.htm
*Thursday, October 9, 2008 at 12:52am by bobpursley*

**Calculus**

What is wrong with the following reasoning??? f(x) = 2^x f'(x) = x[2^(x-1)] Although n x^(n-1) is the derivative of x^n, you cannot apply similar rules when x is the exponent and the number being raised to a power is a constant. The derivative of b^x, where b is a constant, is...
*Wednesday, June 13, 2007 at 10:40pm by Raj*

**Math**

http://math2.org/math/geometry/areasvols.htm
*Monday, February 25, 2013 at 2:19pm by Ms. Sue*

**math2**

how does this help
*Wednesday, February 24, 2010 at 8:19pm by LILIANA2*

**Math2**

where is B ?
*Sunday, December 5, 2010 at 5:23pm by Reiny*

**math2**

what is a ray
*Wednesday, February 24, 2010 at 8:19pm by liliana2*

**math2**

Which statement is false? a ¡ô {a, b, c} ¨ª ¡ø {a, b, c} ¨ª ¡ö {a, b, c} ¨ª ¡ô {a, b, c}
*Sunday, June 19, 2011 at 4:53pm by anonymous*

**honors math2**

-7/(21/4*3/7)
*Monday, November 4, 2013 at 8:58pm by rian*

**honors math2**

-7(21/4 * 3/7) -7/( 9/4) -7(4/9) = -28/9
*Monday, November 4, 2013 at 8:58pm by Kuai*

**MATH2**

in the limit as h>zero, it is 8x+2.
*Sunday, October 5, 2008 at 7:11pm by bobpursley*

**math2**

If you can please answer that question from 5:08 thanks
*Monday, February 3, 2014 at 6:52pm by jenn B*

**math**

describe general rule for which fraction that have decimal forms that terminate and which have decimals that repeat and list prime factorizations for each: 1/2 , 1/3, 1/4, 1/5,1/6,1/7,1/8,1/9,1/10,1/11,1/12 how do I do these problems? I searched Google under the key words "...
*Wednesday, March 7, 2007 at 8:26pm by patti help*

**math2**

how to solve 2[5a-3(4a-b)]-4[8b+5(a-2b)]
*Tuesday, November 20, 2012 at 3:20am by jasmine*

**MATH2**

what multiple does 27,8, and 6 all have in common
*Wednesday, November 6, 2013 at 11:00pm by rian*

**Math2**

Factor: 2xy – xz + 2wy – wz (x+w)(2y-z)
*Tuesday, January 30, 2007 at 5:25pm by Margie*

**MATH2**

Given f(x) = 4x 2 + 2x - 1, the simplified form of the difference quotient, [f(x+h) - f(x)]/h is, what?
*Sunday, October 5, 2008 at 7:11pm by Casey*

**math2**

What would be the greatest commmon factor to 15, 34, and 55?
*Sunday, April 3, 2011 at 11:16pm by Anonymous*

**MATH2**

0 and 1 is all I know unless those are factors I don't know I get them confused. >.<
*Wednesday, November 6, 2013 at 11:00pm by Angelina*

**Math2(PLease Help)**

Directions:Solve the rational expression. Problem: 1/(x+3)+1/(x-3)=1/(x^2-9) get (x+3), (x-3), and (x^2-9) to the same denominator...
*Tuesday, March 27, 2007 at 6:18pm by margie*

**please check my math2**

Copy and paste is not allowed on this site. That is probably the problem.
*Saturday, March 21, 2009 at 6:26pm by Damon*

**Math2**

hint the rate of volume increase, 70 = surface area * dh/dt
*Wednesday, April 20, 2011 at 6:17pm by Damon*

**Math2**

Given f, a derivable function and y = f (x)^3 + 40√(f(x)+12) . Knowing that f(4) = -4 and that dy/dx|x=4 = 14 , calculate f’(4)
*Wednesday, March 23, 2011 at 10:24pm by Ralph*

**math2**

Tell how to use compatible numbers to compute each of the following. (a) 125 + 3 + 40 + 37 + 75 + 60 (b) 4 • 4 • 50 • 25
*Monday, August 17, 2009 at 8:24pm by kimberly*

**,Math2**

calculate the cost per barrel if 4000 barrels were extracted from the ground C=9x2-144x+480000 this is a quadratic relation the 2 is a exoponet
*Tuesday, December 18, 2012 at 6:41pm by t*

**More Math2(MathGuru)**

5. Find the x and y intercepts of each linear equation. Be sure to write your answers as ordered pairs. a. y = 3x - 6 b. 6y = -x + 2 *What do I do here.?
*Tuesday, February 6, 2007 at 10:13am by Margie*

**math2 calc**

Let f(x) be the function 11x2−9x+7. Then the quotient f(6+h)−f(6)h can be simplified to ah+b for: a= and b=
*Wednesday, September 28, 2011 at 3:44am by Alison*

**please check my math2**

You do not seem to have completed the question. By the way, if the two bodies are hanging on the same string, how can ther be an im[act?
*Saturday, March 21, 2009 at 6:26pm by drwls*

**Math2**

Right. The estimate is 14 since 2.7 is a little less than 3. However, 15 may be an acceptable estimate.
*Thursday, December 5, 2013 at 1:41pm by Ms. Sue*

**heeelp math2**

Find the number of polynomials f(x) that satisfy all of the following conditions: f(x) is a monic polynomial, f(x) has degree 1000, f(x) has integer coefficients, f(x) divides f(2x^3+x)
*Wednesday, July 10, 2013 at 9:54am by lin*

**Math**

Can you convert these fractions to decimals? http://www.mathsisfun.com/converting-fractions-decimals.html http://math2.org/math/general/arithmetic/fradec.htm
*Wednesday, April 3, 2013 at 3:57pm by Ms. Sue*

**please check my math2**

You figured it out, thanks Damon. But how come my work didn't get posted with the question... I did it like you up until the 12.2kg m/s part... Now i know where I went wrong.. T-Y Henri
*Saturday, March 21, 2009 at 6:26pm by Henri*

**math2**

I cannot read the symboles in the different choices. If you find one which reads: a ∉ {a,b,c} it would be false. Alternatively, if you would repost using encoding: Western ISO-8859-1, it will be understandable to me.
*Sunday, June 19, 2011 at 4:53pm by MathMate*

**math2**

set up a simple ratio, g/297 = 7/189 g = 7(297)/189 g = .....
*Thursday, March 11, 2010 at 9:29am by Reiny*

**math2**

an open right circular cylindrical tank of given volume stands with vertical axis. the material of its bottom costs twice as much per unit area as that for the sides. find the most economical proportion?
*Monday, February 14, 2011 at 12:45am by gen*

**Math2**

Directions:Solve and graph the inequalities using words. Problems: 4.-3x>-6 or x-5<=2 5.x+2>2x-1 or -6>-2x-2
*Wednesday, April 18, 2007 at 7:36pm by margie*

**math2**

Solve the problem. You traveled 189 miles on 7 gallons of gasoline. At this rate, how many gallons of gasoline would you need to travel 297 miles?
*Thursday, March 11, 2010 at 9:29am by pat*

**math2(count iblis)**

-y^3(2x^2y-4xy^2)=-2x^2y^4+4xy^6 *is this correct.? No, in the last term, the y should be to the fifth power (3+2)
*Sunday, February 4, 2007 at 5:11pm by Margie*

**Math2**

We pour water into a conical container of a radius of 10 cm with a height of 36cm at a rate of 70 cm^3/s. At what velocity does the water level increase when it reaches 12 cm? dh/dt=?
*Wednesday, April 20, 2011 at 9:47am by Ralph*

**Math2**

We pour water into a conical container of a radius of 10 cm with a height of 36cm at a rate of 70 cm^3/s. At what velocity does the water level increase when it reaches 12 cm? dh/dt=?
*Wednesday, April 20, 2011 at 6:17pm by Ralph*

**math2**

Dan had to complete the remaining 1/3 of his science project this week. On Monday, he completed 4/5 of the work he had left to do. What part of the entire project did Dan complete on Monday? Can you guide me on how to figure it out?
*Thursday, November 10, 2011 at 7:29pm by Maria*

**math2**

first, we list the factors of each number,, 15: 1, 3, 5, 15 34: 1, 2, 17, 34 55: 1, 5, 11, 55 since the only common factor among them is 1, the greatest common factor (GCF) of the numbers is 1. hope this helps~ :)
*Sunday, April 3, 2011 at 11:16pm by Jai*

**Math2**

A "quick picture" is an estimate than? 5 x 2.7 ..... 5 x 3= 15 Its been a long time since elementary school and I do not remember "quick picture" The question was How can you use a "quick picture" to find 5 x 2.7? the answer is 13.5.......an estimate would be 15
*Thursday, December 5, 2013 at 1:41pm by Donald*

**heeelp math2**

brilliant qn as usual. Since the live period is over, here is a hint: We only ned to consider irreducibles of degree≤1000 and consider how many ways there are to multiply such polynomials together to obtain a polynomial of degree 1000. Next show that |å| ≤ 1 where...
*Wednesday, July 10, 2013 at 9:54am by exactly*

**math2**

Oops! Sorry. Let's see if I get it right this time. :-) http://www.mathopenref.com/ray.html
*Wednesday, February 24, 2010 at 8:19pm by Ms. Sue*

**MATH**

http://math2.org/math/algebra/basicidens.htm http://en.wikipedia.org/wiki/List_of_mathematical_identities http://www.google.com/search?q=math+identities&hl=en&tbm=isch&tbo=u&source=univ&sa=X&ei=cZdEUcLkKKS3ygHO2ICABg&sqi=2&ved=0CEoQsAQ&biw=711&bih=453
*Saturday, March 16, 2013 at 11:36am by Ms. Sue*

**Math2**

if arc AC=140 degrees, what is angle ABC? if angle ABC=28 degrees, what is arc AC?
*Sunday, December 5, 2010 at 5:23pm by Ian*

**math2**

let the volume be V, where V is a constant V = πr^2h h = V/r^2 Cost = 2(πr^2) + 1(2πrh) = 2πr^2 + 2Vπ/r d(Cost)/dr = 4πr - 2Vπ/r^2 = 0 for min of Cost 4πr = 2Vπ/r^2 r^3 = 2Vπ/(4π) = V/4 form the ratio h : r = V/r^2 : r = V...
*Monday, February 14, 2011 at 12:45am by Reiny*

**Math2(Please Help)**

4x 8 ___ - ______ x+2 x-1 *Simplify The Expression I'm going to assume your problem is this: 4x/(x+2) - 8/(x-1) Use a common denominator since the denominators are not the same. Common denominator is: (x+2)(x-1) Rewriting the problem, we have: 4x(x-1)/(x+2)(x-1) - 8(x+2)/(x+2...
*Saturday, March 3, 2007 at 9:56pm by Margie*

**Math2**

A bacteria culture had a population of 10 million at 10:00 A.M., and by 2:00 P.M. had grown to 14 million. (a) Predict the population at 6:00 P.M. that same day. (Round your answer to one decimal place.) (b) When will the population double in size? (Round your answer to the ...
*Wednesday, January 30, 2013 at 11:18am by Christina*

**math2 calc**

I have a sneaking suspicion that you mean [f(6+h)âˆ’f(6)]/ h f(6+h) = 11(6+h)^2 - 9(6+h) + 7 f(6) = 11(6)^2 - 9(6) + 7 --------------------------------- f(6+h) -f(h) = 11(12h+h^2) -9h = 132 h+ 11 h^2 - 9h = 123 h + 11 h^2 now divide by h = 11 h + 123 a = 11 b = 123 check with ...
*Wednesday, September 28, 2011 at 3:44am by Damon*

**math**

What is a better way to remember your timed tables? Is there a game or a song you can go by or something? These websites have games and many ways to practice the times tables. http://www.woodlands-junior.kent.sch.uk/maths/timestable/index.html http://www.bbc.co.uk/skillswise/...
*Sunday, August 5, 2007 at 12:15pm by Mack*

**math2**

there's nothing to solve If you want to simplify the expression, then it comes out 2[5a-3(4a-b)]-4[8b+5(a-2b)] 2[5a-(12a-3b)]-4[8b+(5a-10b)] 2[5a - 12a + 3b] - 4[8b + 5a - 10b] 2[-7a+3b]-4[5a-2b] -14a+6b-20a+8b -34a+14b
*Tuesday, November 20, 2012 at 3:20am by Steve*

**math2**

http://www.jiskha.com/display.cgi?id=1267059872
*Wednesday, February 24, 2010 at 8:19pm by Ms. Sue*

**MATH2**

done here .... http://www.jiskha.com/display.cgi?id=1383794511
*Wednesday, November 6, 2013 at 11:00pm by Reiny*

**Math2**

The universal law of gravitation determines the amount of force exerted by a constant mass (M) on another constant mass (m), separated by a distance (r), is given by the expression F = ( -GmM )/r^2 a) What mathematical expression characterises the instant rate of change of the...
*Tuesday, October 18, 2011 at 2:52pm by Raf*

**calculus help please**

dy/dx = 2y^2 Integrating...y=2/3 y^3 + C put 1,-1 into the equation, and solve for C. Then find the y for x=2 if y= a^uhttp://math2.org/math/integrals/tableof.htm see exponential functions. dy/dx=2y^2 and if y=-1 when x=1, then when x=2, y=? how do i get x in the equation. do ...
*Sunday, December 10, 2006 at 5:58pm by bobpursley*

**Math2(Please help)**

Directions:Solve and explain the inequality using words.Tell which wa shading goes. Problem: x+3=>2x+1 and -4x<-8 -4x<-8 The first inequality can be rewritten x <= 2 In words, x is less than or equal to 2. You can get that by subtracting x+1 from both sides. The ...
*Tuesday, April 10, 2007 at 8:04pm by margie*

**math2**

I would pick 125 + 40 + 40 + 75 + 60. The actual numbers you choose depends somewhat upon how well you add. Here is what I would do. I would add the 125 to the 75 = 200. Then I would add 60 + 40 = 100 Of course 37 + 3 = 40 So it should be 200 + 100 + 40 = 340
*Monday, August 17, 2009 at 8:24pm by DrBob222*

**math2**

If you have a line plot with a bag of nuts(in pounds) and there is 1/8 on the graph with 8 x marks on of it bags, 1/4 with 4 x on top of it bags, and 1/2 with 4 x marks on top of it bags. The question goes as follow, Amy filled bags with nuts. She weighed the bags and made a ...
*Monday, February 3, 2014 at 5:08pm by jenn B*

**math2**

The common denominator of 1/3 and 4/5 is 15 So 1/3 of project or 5/15 is remaining On Monday Dan completed 4/5 of remaining or 4/15 of entire project. I think of it this way, if there are 15 pieces to complete As of Monday 10 pieces were already complete which left 5 If Dan ...
*Thursday, November 10, 2011 at 7:29pm by Lee*

**Math2[Please Check Again]**

Problem: a^2-9 a^2-3a ----- * -------- a^2 a^2+a-12 What I Got: 3-3a ---- a-4 *Please Check My Work.* Nope. factor the denominator to a^2(a+4)(a-3) The last factor divides out in the numerattor (second term factors to a(a-3). The a in the numerator reduces the denominaor a^2 ...
*Saturday, February 24, 2007 at 6:14pm by Margie*

**MATH! Urgent**

umm suppose a parabola has a vertex at (0,2) and points (1,1) how would I derive the equation and focus, i've been trying to understand this for so long, I can't get it. Does this parabola have the equation (y-2)^2 = x and a focus of 1/4?? Is that correct?? I searched Google ...
*Thursday, November 2, 2006 at 11:04am by sally*

**please check my math2**

Perhaps they are hanging from the same hook 2.1 meters below the hook but on different strings? Then the 3.75 kg one is lifted up .545 m this gains U = m g h = 3.75*9.8*.545 U = 20 Joules let it go then just before they hit (1/2) m v^2 = 20 v^2 = 40/3.75 = 10.7 v = 3.27 m/s ...
*Saturday, March 21, 2009 at 6:26pm by Damon*

**Please Check (Math2)**

a^2-9 a^2-3a ----- * ------- a^2 a^2+a-12 *I got: 3-3a/4 I dont think so. factor the a^2-9, and the second numerator to a(a-3) Then the denominator factored is a^2*(a+4)(a-3) So wait... don't I have to first have to take out the repeated thingys.? I dont know what repeated ...
*Wednesday, February 21, 2007 at 7:23pm by Margie*

**math2**

5y^8-125 *you have to factor completley easy. Take out the five: 5(y^8-25) Now, isnt y8 the same as y4 )2 ? That is a square, so you have that y4 squared minus another perfect square? That factor as the difference of two squares. After doing that, you may have another ...
*Sunday, January 28, 2007 at 11:41am by margie*

**homework help!!!**

Can you explain in more detail WHY ....if you live in Atlanta and your grandparents live in Seattle and they go to bed at 10 pm.. 7pm Atlanta time would be the latest they would call.... I think that's wrong. Since the sun rises in the east, the east coast, including Atlanta, ...
*Friday, August 17, 2007 at 8:31pm by deanna*

**Multiplication**

What is the best way to teach my 8 year old her multiplication tables. You'll probably get lots of answers and opinions! I'll tell you what worked with my brother and then with my grandsons -- repetition, repetition, and more repetition -- both verbally and in writing and with...
*Thursday, June 15, 2006 at 5:17pm by Patricia*

**please check my math2**

Two bodies hang on a string 2.1m long. The two bodies have a mass of 3.75kg and 2.4kg respectively. If the 3.75kg mass is raised to a height of 0.545m and released, and if upon impact the mass adhere. Mass1 = 3.75 kg Mass2 = 2.4 kg String length = 2.1 m M1 raised = 0.545m a) ...
*Saturday, March 21, 2009 at 6:26pm by Henri*

**please check my math2**

This was the original post... Two bodies hang on a string 2.1m long. The two bodies have a mass of 3.75kg and 2.4kg respectively. If the 3.75kg mass is raised to a height of 0.545m and released, and if upon impact the mass adhere. Mass1 = 3.75 kg Mass2 = 2.4 kg String length...
*Saturday, March 21, 2009 at 6:26pm by Henri*

**math2**

Mary is moving and wants photos to remember her six friends. If pictures are taken so there is a shot of every possible pair of friends- including Mary, how many pictures will be take? Would one roll of 24 exposures be enough? 27 Mary is moving and wants photos to remember her...
*Wednesday, January 24, 2007 at 6:42pm by Preston*

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