Questions on Algebra: Proportions answered by real tutors!

Tutors Answer Your Questions about Proportions (FREE)

Question 241812: x/4=2/3
Click here to see answer by checkley77(12569)

Question 242121: OK i need help with this question just on how to set it up-
A man combines 7 fl oz of oil with 4 fl oz of vinegar. One day he needed a larger amount, so he used 8 fl oz of oil. How much vinegar did he need?
please show me how to set it up into a proportion!!!
Click here to see answer by checkley77(12569)

Question 242267: A postal worker can sort a days worth of mail in 8 hours. with her supervisor helping, it takes 3 hours. how long would it take the supervisor working alone?
Click here to see answer by nyc_function(2733)

Question 242526: Solve the following without using cross multiplication:
A motorbike can run for 10 minutes on $1.30 worth of fuel. How long could it run on $0.91 worth of fuel?
Please help. Even just some ideas would be great. Thank you.
Click here to see answer by solver91311(17077)

Question 242662: Given a/b = 2, a/c =12 a/d = 2 find the value of ab /cd
Click here to see answer by rapaljer(4667)

Question 243025: One side of a rectangle is 5 inches and the other side is x inches. Find the value of x if the area must be at least 60 square inches. Use A = L*W.

Click here to see answer by JimboP1977(308)

Question 243024: You are traveling to your aunt's house that is 234 miles away. If you are currently twice as far from home as you are from your aunt's, how far have you traveled?
Click here to see answer by nyc_function(2733)

Question 243333: im doing a scale project for school. i dont knw how to put my measurements in proportions for length, width, and depth. could you plz give me examples like make up measurements for length, width, depth and put them in proportions. plz. and thankyou for helping.
Click here to see answer by checkley77(12569)

Question 244198: Jim's car will travel 240 mi. on 15 gal. of gas. How far can he expect to go on 3 gal. of gas?
Any ideas? Thanks so much.
Click here to see answer by checkley77(12569)

Question 244195: On a city map, a rectangular park has a length of 4 in. If the actual length and width of the park are 500 ft. and 300 ft, respectively, how wide is the park on the map?
Please help! Thank you.
Click here to see answer by checkley77(12569)

Question 244191: Jim found out that after working for 9 months he had earned 6 days of vacation time. How many days per year does he earn at this rate?
Please help! Thank you.
Click here to see answer by checkley77(12569)

Question 244413: A train crosses a pole in 15 sec, while it crosses 100 meter long platform in 25 sec. the length of the train is:
Click here to see answer by edjones(7569)

Question 244398: Write a model for the statement
A is directly proportional to W
Click here to see answer by rapaljer(4667)

Question 244584: If the ratio of boys to girls in a class is 3 to 8, will the ratio of boys to girls stay the same, become greater or become lesser if 2 boys and 2 girls leave the class. Justify your answer.
This is what I answered, I just don't think it is correct:
The ratio will stay the same because you are removing the same amount of both girls and boys out of the class. Therefore, the ratio doesn't change because even though it diminishes the class by 4 students, the proportion of boys to girls doesn't change.
Click here to see answer by jim_thompson5910(28717)

Question 244627: 12.5 is 75% of what number?
Click here to see answer by richwmiller(9144)

Question 240833: Hi, I need help with this proportion.
4x/3x = 6x/4.5x
Solve for x.
Click here to see answer by checkley77(12569)

Question 244868: what is the geometric mean of the numbers 7 and 14?
Click here to see answer by unlockmath(1614)

Question 244574: downtown department store has a 75 percent all clothing items. a certain sweater cost the store 20 dollars. what will be the selling price of 20 dollars?
hi, i try to do proportions for this problem but notice that they wanted to take 75 percent of 20 dollars and having a problem setting that up.
Click here to see answer by KirkseyTD(2)

Question 244578: Two cubic meters of olive oil have a mass of 1830 kilograms. What is the density of olive oil?
Click here to see answer by Alan3354(31538)

Question 245498: 22/38 = 33/2x+7 =
Click here to see answer by checkley77(12569)

Question 245489: If a 1/4-c serving of Crunchies breakfast food has 0.5% of the minimum daily requirement of vitamin C, how many cups would you have to eat to obtain the minimum daily requirement of vitamin C?
Please help, thank you.
Click here to see answer by checkley77(12569)

Question 245486: On a certain day in Glacier Park, 728 eagles were counted. Five years later, 594 were counted. What was the percentage of decrease in the number of eagles counted?
Please help, thank you!
Click here to see answer by checkley77(12569)

Question 245582: If 70% of the girls in a class wanted to have a prom and 40% of the boys wanted a prom, is it possible that only 50% of the students in the class wanted a prom? Explain your answer.
I am lost. Please help, thank you.
Click here to see answer by solver91311(17077)

Question 245742: 5/14=4/a
Click here to see answer by TheProdicalSon(33)

Question 245742: 5/14=4/a
Click here to see answer by richwmiller(9144)

Question 246083: The directons say
"Use the percent proportions to solve each problem.Round to the nearest tenths, if necessary."
Question Number 3. Says
"3.4 is what percent of 5?"
My Question: how do I answer that with work shown?
I'm trying to figure out how exactly to do that problem without a calculator?
Click here to see answer by stanbon(57984)

Question 246187: Please help me solve this word problem.
The perimeter of a rectangle is 210ft. The length is 15ft. less than twice the width. What is the length and the width?
I have tried dividing 210 by 6, getting 35 for each width, and 70 for each length. Then I added the widths (35+35), to get 70. I subtracted 15 from 70 and got a sum of 55 and divided that by 2 getting(27.5). I then added 15 to both of my lengths (15+70+70), and divided that by 2 getting 77.5. Am I correct that the length is 77.5ft., and the width is 27.5ft.?
Click here to see answer by stanbon(57984)

Question 246290: what number that would be square rooted would give me 8

Click here to see answer by richwmiller(9144)

Question 246801: If Sally can paint a house in 4 hours and John can paint the same house in 6 hours, how long will it take for both of them to paint the house together?
The furthest I can get is the following:
Sally 4 hours/house = John 6 hours/house
I have no idea where to go from here. Any help would be appreciated.
thanks,
Carrie
Click here to see answer by solver91311(17077)

Question 246851: how do you set up a proportion ?
Click here to see answer by richwmiller(9144)

Question 247094: The ratio of men to women at a certain company is 7 to 4. How many employees does the company have if there are 35 male employees?
In which way 7men and 4women combine like 35men and "some given" women? Proportions are fractions. So 7/4=1.75 (read 7 divided by 4 equal 1.75) must be the same (equal) to 35/some number=1.75.
So what is that number? Well, try with the most simple equivalent example to unlock the mistery. For instance, if the numbers were 6/what number?=2 which answer would it be?. Then you know that the "what number?* is 3 because you saw, intuitively,that there are 3 groups of 2 objects making a total of 6 object. In other words, you did 6/2=3. So do the same with the "more complicated" numbers of the questions.
35/what number?= 1.75
The answer is 35/1.75=20
So now we know that there are 20 women.
So in total there are 35 men and 20 women. 35+20=55 employees in total.
Click here to see answer by edjones(7569)

Question 247175: I am very lost on this equation...can someone please help explain this to me.
(x-7+5/x-1)/(x-3+1/x-1) do the denominators of x-1 cancel out???

Click here to see answer by College Student(505)

Question 247280: The number of kilograms W of water in a human body varies directly as the total body weight B. A person who weighs 75 kg contains 54 kg of water.
a) Find an equation of variation.
b) How many kilograms of water are in a person who weighs 95 kg?
Click here to see answer by solver91311(17077)

Question 247538: A box contains 50 razor blades, five of these are known to be used, the remainder unused. What is the probability that exactly 3 will be used.

Click here to see answer by Edwin McCravy(8999)

Question 247542: jan drove 310 km in 4 hours. at that rate jow far did she drive in 3 hours?
Click here to see answer by checkley77(12569)

Question 247541: If the laborer made $216 for 8hrs. of work,what is his hourly pay.

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Question 248005: two rectangles are similar. the first is 4 in wide and 15 in long. the second is 9 in wide. find the length of the second rectangle.
Click here to see answer by oberobic(2304)

Question 248248: Hello, kind tutor!
Having a work problem concerning dilutions, and therefore ratios.
We took 30 microliters of a stock, and added it to 270 microliters of saline to make 300 microliters of a 1:10 dilution. We then took this 300 microliters and added 100 microliters of another solution to that to form 400 microliters total.
2 questions regarding this: What would the second dilution (300 microliters + 100 microliters) be considered? 3:4?
And, what would the final dilution be?
My boss and another coworker said it would end up being 1:13.3, (roughly 1:13), but I could not understand how they arrived at that number.
Thank you very much for your kind assistance,
Lauren
Click here to see answer by stanbon(57984)

Question 248635: A 3-men crew can do a certain job in 3 weeks and 2 days, if we are to hire 4 men crew instead, with the same rate as the first crew, how long would it take the 4-men crew to do the same job? Note: a week contains 6 working days and a work day is 8 hours.
Click here to see answer by josmiceli(9817)

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