Search: Math - Proportions

Number of results: 188,279

Math
I'm doing proportions, and I'm kinda confused with this one problem.. x/3=1/5. the way I do proportions is by cross multiplying, so I get 3=5x? I don't know what my answer would be?
Friday, October 15, 2010 at 6:44pm by anthony

math
I don't know how you got your answers, but you answer needs to be less than 40. Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions for the Z scores. Multiply the ...
Wednesday, September 7, 2011 at 6:31pm by PsyDAG

Math--Proportions
Solve for x: 2 to x+1=x+2 to 3 or 2 to x+3= x+2 to x+5 (the proportions end up being the same in the end) I keep getting to the part after you FOIL, and then I get stuck
Tuesday, April 5, 2011 at 6:42pm by Lily

math
Please see my previous explanations and study the proportions part of this page carefully. http://www.homeschoolmath.net/teaching/proportions.php
Friday, January 15, 2010 at 10:58am by Ms. Sue

8th grade Algebra I (junior level math)
Hello, I am currently in Unit 4-1 (Ratio, and Proportions) and I don't understand how pairs of ratios could form proportions. Could someone give me step by step instructions? Thank You
Tuesday, December 1, 2009 at 7:14pm by Jay

math156-proportions
I can solve the proportions by any method. can anyone help me understand this. #1 4/15 = x/5 #2 x/3 = x+10/6
Monday, September 14, 2009 at 11:16pm by Christy

Math grd 12
a. Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to those Z scores. b. Sum the two proportions and multiply by 50,000.
Wednesday, January 19, 2011 at 10:03pm by PsyDAG

AP Statistics
12) Which of the following statements is true? a) The sampling distribution of the difference between two proportions will always be normal. b) When comparing two population proportions, either sample proportion can be used as the unbiased estimate of the true population ...
Thursday, March 14, 2013 at 4:53pm by Joker

Statistics
Use the table in the back of your book labeled something like "areas under the normal distribution." Find the above Z scores and the proportions between them and the mean. Add the two proportions. I hope this helps. Thanks for asking.
Sunday, April 27, 2008 at 10:58pm by PsyDAG

statistics
For three independent samples, each with n= 100, the respective sample proportions are 0.30, 0.35, and 0.25. Use the 0.05 level in testing whether the three population proportions could be the same.
Wednesday, August 12, 2009 at 10:37pm by Laura

psychology
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to Z scores. Multiply the proportions by 100 to get percentages.
Thursday, April 5, 2012 at 11:24pm by PsyDAG

stat
Ho: proportions = Ha: proportions ≠ Use Chi Square test. http://math.hws.edu/javamath/ryan/ChiSquare.html
Sunday, July 24, 2011 at 8:21am by PsyDAG

math-proportions
Use direct proportions: 60oz for 2400 sq.ft X oz for 4400 sq.ft Cross multiply: X=60*4400/2400=110 oz.
Thursday, February 17, 2011 at 11:59pm by MathMate

6th grade math
These sites should help. http://www.mathsisfun.com/numbers/ratio.html http://www.mathsisfun.com/algebra/proportions.html https://www.khanacademy.org/math/arithmetic/rates-and-ratios/ratios_and_proportions/v/ratio-and-proportion http://www.homeschoolmath.net/teaching/...
Monday, January 28, 2013 at 10:12pm by Ms. Sue

chem
to find it i use proportions. the whole polyatomic ion as 100% and then break it up and find the percent of each element then find out the total and use proportions
Thursday, December 18, 2008 at 8:39pm by Tom from Mississippi

Stats
Z = (score-mean)/SD Compute both Z scores. Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores. Compare proportions.
Thursday, October 4, 2012 at 1:16am by PsyDAG

algebra
Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores. Use the proportions between Z and mean and multiply by 400.
Saturday, June 2, 2012 at 11:52am by PsyDAG

math
Thanks. Your proportion is: 19/38 = x/60 Cross multiply means to multiply the first and last terms together. Then multiply the middle terms together. 1140 = 38x Use simple algebra to find the value of x. The equation means what unknown number when multiplied by 38 equals 1140...
Friday, January 15, 2010 at 10:53am by Ms. Sue

math
3/5.37 = 8/14.32 http://www.mathleague.com/help/ratio/ratio.htm (Scroll down for proportions.) Proportions are usually pretty easy and is a skill that will be useful all your life! =)
Saturday, September 29, 2007 at 2:33pm by Writeacher

Statistics
You don't need to calculate the proportions under a normal distribution. There should be a table in the back of your stats book labeled something like "areas under the normal distribution." You can plug in various Z scores to get the proportions. I hope this ...
Tuesday, January 26, 2010 at 10:07am by PsyDAG

statistics
Z = (score-mean)/SD Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores. You will want to add the proportions between the two Z scores and the mean.
Monday, October 31, 2011 at 5:29pm by PsyDAG

Chemistry
what happens when ethanol mixed in methanol. These are two clear liquids that are miscible in all proportions. ethanol mixed in acetone. These are two clear liquids that are miscible in all proportions. acetone mixed in methanol. These are two clear liquids that are miscible ...
Thursday, September 22, 2011 at 12:30am by Dr Russ

Statistics
Find a confidence interval formula using proportions. Convert your proportions to decimals for ease in calculation. Use + or - 1.96 for the interval in the formula to represent 95 percent confidence (this is found using a z-table). You should be able to draw your conclusions ...
Monday, August 31, 2009 at 6:59pm by MathGuru

Math
http://www.mathgoodies.com/lessons/percent/proportions.html
Sunday, December 11, 2011 at 10:04am by Ms. Sue

Math
Check this site. http://www.algebra.com/algebra/homework/proportions/lessons/rates.lesson If it doesn't help you, please post one or two of your problems. We'll be happy to show you how to find the solutions.
Tuesday, July 29, 2008 at 9:27pm by Ms. Sue

Math. Proportions
You're welcome.
Monday, February 27, 2012 at 9:45pm by Ms. Sue

Math. Proportions
Thanks a lot !
Monday, February 27, 2012 at 9:45pm by Marko

math
Solve the proportions, 4 : 5::8 :b
Tuesday, November 1, 2011 at 9:03pm by rashawn

math 6th grade proportions
Thank-you!! :)
Monday, December 10, 2012 at 7:48pm by Sierra

math
proportions 4/21=x/168
Thursday, May 3, 2012 at 5:12pm by Taylor

math
Solving the proportions b : 16::6 : 4
Tuesday, November 1, 2011 at 9:06pm by rashawn

Math - Proportions
What is your question?
Sunday, November 15, 2009 at 12:09pm by Ms. Sue

Chemistry
For this problem would I have to use proportions? Analysis of a metal chloride XCI3 shows that it contains 67.2 % CI by mass. Calculate the molar mass of X and identify the element. I tried using proportions: X+CI3/CI3 = ?/67.2 but then I had to find for both X and ?. The ...
Friday, August 27, 2010 at 1:30pm by Amy~

Chemistry 11th Grade
Show that the ratios or "proportions" of the number of moles involved in each compound can be expressed as the ratios of small integers. For example: 1.0/14 = 0.07143 (moles of N) 0.572/16 = 0.03575 (moles of O) The ratio N/O is 1.998 or (rounding off to 3 figures), ...
Monday, May 3, 2010 at 4:12am by drwls

6th grade math
http://www.algebra.com/algebra/homework/proportions/lessons/rates.lesson
Monday, December 8, 2008 at 8:12pm by Ms. Sue

math Statistics (incomplete)
What sample proportions?
Monday, February 18, 2013 at 6:41pm by PsyDAG

math 6th grade proportions
36
Monday, December 10, 2012 at 8:06pm by Anonymous

math 6th grade proportions
You're welcome!
Monday, December 10, 2012 at 7:48pm by Ms. Sue

math
algebra properties and proportions (x+3) 5 ----- = --- x =9/2 6 4 How do you get to this answer?
Thursday, August 7, 2008 at 11:43pm by froggie

math!!
those are proportions by the way
Monday, January 28, 2008 at 6:36pm by Anna-Marie

Math. Proportions
Now your answers are right.
Monday, February 27, 2012 at 9:45pm by Ms. Sue

Math
Describe an application for the use of ratios or proportions
Saturday, November 22, 2008 at 12:44am by Greg

math
algebra properties and proportions (x+1) 1 ----- = --- (x+2) 3 How do you come to this answer?
Thursday, August 7, 2008 at 11:47pm by froggie

Math
Describe an application for the use of ratios or proportions
Friday, February 29, 2008 at 1:36pm by Sherri

Math
Describe an application for the use of ratios or proportions
Thursday, February 28, 2008 at 1:26pm by Allison

math
Show that the given proportions are equivalent. a+c / b+d = a-c / d-b and a / b = c / d
Monday, January 28, 2008 at 6:57pm by Anna-Marie

math proportions
dont know i am so dum at math
Sunday, February 25, 2007 at 5:18pm by natalie

chemistry
I am not sure which compound you are referring to as ethylene chloride, do you mean CH2=CHCl This is a polar compund as would be expected to be micsible with polar solvents. Thus I would expect it to be miscible in all proportions with other halogenated solvents, such as CHCl3...
Wednesday, January 27, 2010 at 12:08am by Dr Russ

statistical applications
In the media, numerous surveys are often displayed reporting percentages or proportions. A margin of error is often reported in the survey and this is used to calculate confidence intervals. Why is it important to create/report confidence intervals (CI) rather than just ...
Friday, May 28, 2010 at 9:21am by cortez

math algebra solve proportions
Cross multiply 8(32)=64g
Wednesday, December 5, 2012 at 9:16pm by Anonymous

chem
Dimethyl ether has a dipole moment but it is less polar than water and ethanol. Ethanol is miscible in all proportions with water. Dimethyl ether dissolves (328 g/100 mL) readily but not in all proportions. The more polar bonds of ethanol and the ability to form hydrogen bond ...
Monday, May 5, 2008 at 9:42pm by DrBob222

math
Using proportions and cross multiplication-- 0.2x=(3.2)(6.4) Therefore x= [(3.2)(6.4)]/.2 Thus, x= 102.4
Saturday, January 19, 2013 at 11:29am by jjwatt

math 6th grade proportions
Cross multiply and solve for x. 6/8 = 27/x
Monday, December 10, 2012 at 8:06pm by Ms. Sue

MATH
Use proportions. Cross multiply and solve for x. 3/2 = 15/x 3/2 = x/46
Wednesday, April 11, 2012 at 8:17pm by Ms. Sue

math urgent!
Lily,check your 4-5-11,6:42pm post for solution to your proportions prob.
Thursday, April 7, 2011 at 7:25pm by Henry

Math
Is this statement true or false? The following proportions will yield the same results: x/2=4/9 and 9/2=4/x
Thursday, March 17, 2011 at 9:51pm by Keenan white

math proportions
17/32 = x/100 1700 = 32x x= 53 1/8 Am I right? yep
Sunday, February 25, 2007 at 5:18pm by Walter

Algebra
There is a rule for this class of problems of finding proportions of mixtures. Most of the time this can be done mentally, for example by chemists or nurses. We have one ingredient A at 20%, and B at 60%. The required mixture is 30% (must be between those of A & B). Take ...
Saturday, June 1, 2013 at 1:36am by MathMate

math
Soory I made a mistake on the last one I meant algebra properties and proportions (x+1) 2 ----- = --- x = 1 (x+2) 3 How do you come to this answer?
Thursday, August 7, 2008 at 11:50pm by froggie

statistics
I don't know how you are using Excel, except if it has the proportions of a normal distribution. Z = (score-mean)/SD = (score-360)/9 Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the Z scores that ...
Saturday, May 7, 2011 at 4:45pm by PsyDAG

Math
How have proportions been useful to solve various math problems that we have studied?
Tuesday, October 7, 2008 at 5:10pm by Nabila Rahman

Math
Create 4 proportions that will work for the following scenario: If the scale is 3.5 in = 8 ft and the drawing measures 6 in, what is the actual distance?
Monday, November 19, 2012 at 9:48pm by ariana

Math - Proportions
This seems like an easy question but I can not seem to find the answer in my reading material. Can anyone possibly help?
Sunday, November 15, 2009 at 12:09pm by Beverly

probability in math
Students in a given class were graded A, B, C, D, and F in proportions of 1:3:4:1:1, respectively. How much information is contained in the message (a) You passed (b) You did not get a B
Monday, October 6, 2008 at 11:27pm by dil

6th Grade Math: Proportions
14/38=X/29. I'm still confused about figuring out what x is and getting X on its own. Please Help!!!
Wednesday, August 8, 2012 at 7:46pm by Hollywood

6th grade math
I need help explaining ratios and proportions to my 6th grader
Monday, January 28, 2013 at 10:12pm by An

math
how do u solve a unit rate problem using proportions to solve
Thursday, January 26, 2012 at 11:31pm by Ch

geometry
in a right triangle ABC, if ab is 14 and bc is 12 wut is bd? there is a pic of a large trangle abc and in it is a line drawn down angle c making it line cd. angle acd then becomes a right trangle as well. i tried working = proportions and pyth thm but i dont seem to be getting...
Sunday, July 15, 2007 at 6:40pm by yacoub

8th grade math
or using proportions and cross multiply: 6:9 100:? ? = 100*9/6=150
Sunday, December 4, 2011 at 12:11pm by MathMate

Math
Help me- Proportions A store has T-shirts on slae at 2 for $5.50. At this rate, what do five T-shirts cost?
Thursday, February 28, 2008 at 2:02pm by Sherri

Math. Proportions
Your first answer is wrong. 23/230 = ? The second and third answers are right. Fourth: 2/ 6 = ? Your last question doesn't make sense.
Monday, February 27, 2012 at 9:45pm by Ms. Sue

Math
These are proportions. Cross multiply and solve for the unknown value. 7/4 = 3/a 7a = 12 a = 12/7 = 1 5/7
Tuesday, October 5, 2010 at 9:57pm by Ms. Sue

math Statistics
Suppose that 33 out of 300 selected american drivers read the newspaper while driving. what percent of sample proportions are greater than this?
Monday, February 18, 2013 at 6:41pm by jessica

statistics
From the data, mode = 32, median = 57 and mean 64, the distribution is definitely positively skewed (to the right). Unfortunately, I don't know Chevyshev's theorem, and I would not assume the distribution to be normal. However, for a normal distribution, Z = (score-...
Sunday, October 17, 2010 at 3:59pm by PsyDAG

Proportions
Okay. Thanks!
Wednesday, November 28, 2012 at 6:26pm by Toph

8th grade Algebra I (junior level math)
How do i solve proportions? step by step answers plz!!!! EXAMPLE! g/5 = 6/10
Tuesday, December 1, 2009 at 7:23pm by Nick

math
one more I really do not understand this one Describe an application for the use of ratios or proportions that is or could be useful in your daily life.
Wednesday, December 3, 2008 at 8:08pm by meshelle

Math
OK, I have had trouble with math, 'C' average, and we are learning proportions. I don't get them! Can someone please do a proportion and then tell the steps to do it? Ex. 4/6= 8/X. Steps: 4/6 equals 8 over x. You do _______ do get ________ over , so X=12. [I know ...
Thursday, February 26, 2009 at 4:45pm by Jayla

Math add a bit of clarity
The * is showing a multiplication sign. The number before / is the numerator and after is the denominator. This has to do with proportions and cross products but I am not understanding the rules/principles here.
Saturday, August 25, 2012 at 2:22pm by Tim

Proportions
y=5/21
Thursday, January 17, 2013 at 9:46am by Dylan

math
As the sample size n increases, the standard error of the proportions will __________. a)be equal to one b)become larger c)become smaller d)remain the same IS IT B)?
Wednesday, July 21, 2010 at 11:39am by thara

Math
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z score.
Thursday, October 25, 2012 at 9:34pm by PsyDAG

MATH
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores.
Thursday, October 27, 2011 at 2:42pm by PsyDAG

math
lydia wrote 4_1/2 pages of her science report in one hour. what was her writing rate in pages per minute? (2-4 rates ratios and proportions)
Thursday, October 21, 2010 at 5:48pm by Max

Proportions
thanks Dylan. but howd you get that?
Thursday, January 17, 2013 at 9:46am by Corie

Chemistry
what do you mean by proportions???
Thursday, November 1, 2007 at 5:40pm by Lauren

math
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to these Z scores. z* = 0, p = .5000
Sunday, October 17, 2010 at 3:35pm by PsyDAG

Percents Using Proportions
You're welcome.
Thursday, January 17, 2013 at 7:37pm by Ms. Sue

Proportions
no. If it were proportional, that "add 32" could not be there.
Wednesday, November 28, 2012 at 6:26pm by Steve

Math Help please!
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions/probabilities related to your Z scores.
Wednesday, April 3, 2013 at 10:53pm by PsyDAG

Math 8 - HELP!!!!!
Ratio, Proportions, and Similarity Similar Figures Clyde makes a copy of an 8 in. x 10 in. photo, reducing it to 3/4 of its size. What are the dimensions of the new photo? Ok... I REALLY don't get this question.. Please help...
Wednesday, February 27, 2013 at 6:56pm by Laruen

Math
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores. Remember that Z = 0 is at the mean.
Sunday, October 30, 2011 at 8:35pm by PsyDAG

Chemistry
http://chemistry.about.com/od/workedchemistryproblems/a/law-of-multiple-proportions-problem.htm
Tuesday, December 14, 2010 at 6:41pm by TutorCat

math algebra solve proportions
i need help on g over 32 = 8 over 64 solve each proportion
Wednesday, December 5, 2012 at 9:16pm by YOLANDA MATEOS

Math
is this the correct answer? I might post more on this exact post, so please bare with me? These are proportions 1.) 2:5 = 4:y Answer: y=2
Tuesday, September 6, 2011 at 4:03pm by Bryce

math
Use proportions. Cross multiply and solve for x. 108/30 = 150/x 108/30 = x/20
Tuesday, August 2, 2011 at 11:43am by Ms. Sue

Math
We will solve the problem by proportions. Let the height of the tree be x, then x/5 = 1/0.4 Cross-multiply to get x=5*1/0.4=12.5 m. Thus the tree is 12.5 m. tall
Wednesday, August 12, 2009 at 4:45pm by MathMate

Math
What you can do is make proportions. Do: 3/50 = 14/x Then, multiply 50 by 14 and divide by 3. So, yes, the answer is 233 and 1/3 Hope I helped!
Tuesday, December 2, 2008 at 3:17pm by Celina

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