# Math - Proportions

137,558 results

### 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?

### stats

scores on a University exam are normally distributed with a mean of 68 and a standard deviation of 9. use the 68-95-99.7 rule to answer the following questions 1) what proportions of students score between a 59 to 77? 2) what proportions of students score between a 50 to 86? 3...

### 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

### 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

### 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

### 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 ...

### 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.

### stats

The purpose of using stratified random sampling is to guarantee that the ______________. a. proportions within the samples represent the proportions in the population. b. sampling variability is increased c. sample groups are highly varied for more precise outcomes d. sampling...

### Chemistry

What data led to the development of the Law of Multiple Proportions? Give an example and explain why this law is important in chemistry. Would this be a good answer: John Dalton used the same observations he used for his law of definite proportions to help develop the law of ...

### math

I'm having a little trouble solving inverse variation. I have four problems - 2 are solved using proportions, 2 are not --- why can they not all be solved using proportions? 1. y varies inversely with x. If y = 40 when x = 16, find x when y = -5 If I use a proportion for that...

### 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 ...

### chemistry

which pairing below does not correctly match the scientist with the contribution to the understanding of the atom A. Proust and the realization that the elements of compounds are found in certain proportions by mass B. Thomson and the law of definite proportions. C. Dalton and...

### chemistry

which pairing below does not correctly match the scientist with the contribution to the understanding of the atom A. Proust and the realization that the elements of compounds are found in certain proportions by mass B. Thomson and the law of definite proportions. C. Dalton and...

### math

Solve the proportions, 4 : 5::8 :b

### math

Solving the proportions b : 16::6 : 4

### math

proportions 4/21=x/168

### Math (Proportions)

1a. x/20=52,5/75= 14 1b. 13/16=x/100= 81.25 1c. 18/25=1/x= 1.38 1d. 25/18=1/x= .72

### math proportions

What is 1000/x = 25/64

### Math

Find the proportions X/12=3/4

### math

Show that the given proportions are equivalent. a+c / b+d = a-c / d-b and a / b = c / d

### math

algebra properties and proportions (x+3) 5 ----- = --- x =9/2 6 4 How do you get to this answer?

### math

Which statement best explains if the graph correctly represents the proportional relationship y = −2x? A coordinate plane is shown. Points are graphed at 2 comma 4 and negative 1 comma 2. The points are joined by a line. No, the points shown would not be part of y = −2x No...

### Statistics

You want to know if there's a difference between the proportions of high school students and college students who read newspapers regularly. out of a random sample of 500 high-school students, 287 say they read newspapers regularly, and out of a random sample of 420 college ...

### Stats

Which of the following statement is true? In testing the hypothesis for the equality of two population proportions, the acceptance region for the null hypothesis will be wider than the confidence interval for two population proportions, assuming the same value of alpha. A 95% ...

### Statistics

You want to know if there's a difference between the proportions of high school students and college students who read newspapers regularly. out of a random sample of 500 high-school students, 287 say they read newspapers regularly, and out of a random sample of 420 college ...

### 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 ...

### Math

Describe an application for the use of ratios or proportions

### Math

Describe an application for the use of ratios or proportions

### math

algebra properties and proportions (x+1) 1 ----- = --- (x+2) 3 How do you come to this answer?

### Math

Describe an application for the use of ratios or proportions

### math proportions

17/32 = x/100 1700 = 32x x= 53 1/8 Am I right? yep

### math

application of Proportions-tic-tac-toe boards ?

### college math

solve these proportions and show work: x/2 = 1/2 plus 1 Thanks

### Statistics

Help Me Please! In a survey of families in which both parents work, one of the questions asked was, "Have you refused a job, promotion, or transfer because it would mean less time with your family?" A total of 200 men and 200 women were asked this question. "Yes" was the ...

### statistics

Which of the following statements are true? (A) In testing the hypothesis for the equality of two population proportions, the acceptance region for the null hypothesis will be wider than the confidence interval for two population proportions, assuming the same value of alpha...

### Math

Is this statement true or false? The following proportions will yield the same results: x/2=4/9 and 9/2=4/x

### Statistics

Find the sample proportions and test statistic for equal proportions. Is the decision close? Find the p-value. a. Dissatisfied workers in two companies: x1 = 40, n1 = 100, x2 = 30, n2 = 100, á = .05, two tailed test. b. Rooms rented at least a week in advance at two hotels: ...

### 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?

### 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?

### math

I go to Conexus and I am super duper behind do you happen to have the answers for the proportions quiz???????? PLEASE A c d c b a d

### 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 don't seem to be ...

### TRIANGLE SIMILARITIES RATIOS AND PROPORTIONS

imageshack(.)(us)/photo/my-images/834/j6wv.jpg/ imageshack(.)(us)/photo/my-images/17/6n4x.jpg/ please PLEASE IM BEGGING YOU MY TEACHER WILL BE GIVING ME 79 IF I DIDN'T GET THIS .. OR ELSE LOWER THAN THAT. PLEASE TRIANGLE SIMILARITIES RATIOS AND PROPORTIONS - BARBIE LEE, ...

### 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?

### Math

I have two math problems I need help with- Percent proportions 1. 62% of 146 is what number? 2. 18.4% of 880 is what number?

### Math

How have proportions been useful to solve various math problems that we have studied?

### proportions

3/8 x __ = __ 3 5/12

### 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?

### 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?

I need help explaining ratios and proportions to my 6th grader

### math

how do u solve a unit rate problem using proportions to solve

### math

im doing percent proportions and it is asking: 57% if 109 is what number? And i already know that you start with 57/100 = x/109 but how do you get the answer, i cant figure it out!!!

### Math 8 - HELP!!!!!

Ratio, Proportions, and Similarity Similar Figures A room is 36 ft long and 18 ft wide. What is the length to width ratio?

### Math (Proportions)

Simplify each expression if possible by combining like terms. If not possible, write simplified 2x+9x I don't understand what to do

### Math

How is using a conversion factor different than using proportions to convert measurement units? Explain which is easier and why.

### Math

how is using a conversion factor different from using proportions to convert measurement units? Explain which is easier and why.

### 8th grade Algebra I (junior level math)

How do i solve proportions? step by step answers plz!!!! EXAMPLE! g/5 = 6/10

### Proportions

b = 6 --- --- 15 10 how do I solve this problems

### 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.

### statistics

During the first 13 weeks of the television season, the Saturday evening 8:00 P.M. to 9:00 P.M. audience proportions were recorded as ABC 29%, CBS 28%, NBC 25%, and independents 18%. A sample of 300 homes two weeks after a Saturday night schedule revision yielded the following...

### statistics

During the first 13 weeks of the television season, the Saturday evening 8:00 P.M. to 9:00 P.M. audience proportions were recorded as ABC 29%, CBS 28%, NBC 25%, and independents 18%. A sample of 300 homes two weeks after a Saturday night schedule revision yielded the following...

### Proportions

What is the solution to the proportion 3y-8/12=y/5? can someone help me do this?

### Algebra

What is the mean and extremes of proportions?

### 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)?

### economics 2

During the first 13 weeks of the television season, the Saturday evening 8:00 P.M. to 9:00 P.M. audience proportions were recorded as ABC 29%, CBS 28%, NBC 25%, and independents 18%. A sample of 300 homes two weeks after a Saturday night schedule revision yielded the following...

### Statistics

During the first 13 weeks of the television season, the Saturday evening 8:00 P.M. to 9:00 P.M. audience proportions were recorded as ABC 29%, CBS 28%, NBC 25%, and independents 18%. A sample of 300 homes two weeks after a Saturday night schedule revision yielded the following...

### Math-Proportions

My math question says- 1 1/2:9 = x:18 Now I gotta figure out the missing number [x]...I have 3 guesses on what answer the missing number [x] is! Either- A)2 1/2 B)3/4 or C)3 Which one is it? 1 1/2:9 = x:18 1 1/2/9 = x/18 x = 1 1/2*18/9 x = 3 hi i like garry unfortunately its ...

### 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 this is rong...

### statistics

I need to find the chi square distribution. Thanks During the first 13 weeks of the television season, the Saturday evening 8:00 P.M. to 9:00 P.M. audience proportions were recorded as ABC 29%, CBS 28%, NBC 25%, and independents 18%. A sample of 300 homes two weeks after a ...

### statistics

I need to find the chi square distribution. Thanks During the first 13 weeks of the television season, the Saturday evening 8:00 P.M. to 9:00 P.M. audience proportions were recorded as ABC 29%, CBS 28%, NBC 25%, and independents 18%. A sample of 300 homes two weeks after a ...

### Geometry

Can someone tell me how to solve these proportions? Thank you 5 7 ---- ----- = x - 1 x

### 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)

### Math

Can someone explain to me in there own words How is using a conversion factor different than using proportions to convert measurement units and which one is easy because i don't understand

During the first 13 weeks of the television season, the Saturday evening 8:00 P.M. to 9:00 P.M. audience proportions were recorded as ABC 29%, CBS 28%, NBC 25%, and independents 18%. A sample of 300 homes two weeks after a Saturday night schedule revision yielded the following...

### proportions

make 3/5 u=in to a percent then round it to nearest tenth

### geometry

How are proportions solved when brought out in word problems?

### stats

How would r change if researchers had recordered the proportions?

### Genetics

Can you help me determine the phenotype and proportions expected from these crosses in chickens? a) RR Pp x rr Pp b) rr PP x Rr Pp c) Rr Pp x Rr pp

### algebra

use each number once to form three proportions. 1,2,10,4,12,20 15,5,16,6,8,3

### math

Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321

### Math

Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321

### math

Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321 .

### math

A persons height is 161 and the persons shadow is 280, and a objects height is 345. Solve by using proportions

### math

Person's height is 163 and the person's shadow is 290. The objects shadow is 345. Solve by using proportions

### math

Persons height is 165 and the persons shadow is 285. The objects shadow is 345. Solve by using proportions

### 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

### Math

In right triangle ABC, altitude CD is drawn to hypotenuse AB. If AD equals 4 and AC exceeds DB by 1, find DB. It is from a worksheet about proportions in a right triangle.

### math

A double recipe of cookies calls for 5 cups of flour. Which of the following proportions could be used to find the amount of flour for a triple recipe? 5/2= f/3 2/5=f/3 2/3 = f/5 3/2=5/f

### algebra 1

I am working on cross products of proportions. one question is 5/7 = 3w/21 Can someone help?

### math

Use proportions to solve this problem: Lisa ran 3 miles in 21 minutes. At that rate, how long would it take Lisa to run 5 miles?

1- When the necessary conditions are met, a two-tail test is being conducted to test the difference between two population proportions. The two sample proportions are p1= 0.25 and p2 = 0.20 , and the standard error of the sampling distribution of p1 − p2 is 0.04. The ...

### Math

How would proportions be used to "scale up" or "scale down" something? (Not really sure if I even understand what this means. I even read my text and I can't figure this out.)

### Math

Joan has two similar rectangular shaped pieces. One has with 4 inches in length 6 inches and the other has a width of 4 inches period what is the area of the larger rectangle piece. use proportions

### Geometry

Find the value of the variable x in the following proportions 6/x = 9/8 x=48/9=5.333333... 5/5 = 4/x x=4 1/2 = 2/x x=4 x/10 = 10/8 x=12.5 Are my answers correct?

### chemistry

What is composed of atoms in fixed proportions? A. mixtures B. compounds C. electrons D. elements

### proportions

In Spanish class, the girl to boy ratio is 6 to 4. If there are a total of 20 students, how many boys are there?

### science

What happened to the proportions of the two phenotypes as the F1 generation grew from 10 to 100 offspring? Why?

### algebra

Which of the following proportions will allow you to correctly compute the answer to the question: 51 in = ___ft. ? 1. 51/x = 1/12 2. x/51 = 12/1 3. 51/12 = 1/x 4. 51/x = 12/1