Questions on Algebra: Proportions answered by real tutors!

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Question 213023: by weight, the ratio of chlorine to sodium in table salt is 35.46 to 23.00. How much sodium is contained in 50.00kg or salt? Has to be set up as an appropriate proportion and then be solved.
Click here to see answer by math108(1)

Question 563500: a scale model of the eiffel tower is 5 inches tall. if the real eiffel tower is 450 ft. tall, what is the scale of the model?

Click here to see answer by kindle(1)

Question 563628: 8 men build a fence in 6 days. How much time will it take 12 men to build the same fence?

Click here to see answer by Alan3354(30993)

Question 563815: A bottle is half full. AFter adding 275mL to the bottle it is three quarters full. How much does the bottle hold when full?
Click here to see answer by stanbon(57412)

Question 565017: You were assigned a locker for your books at school. You forgot the locker number but remember that two of the 12 positive factors of the locker number are 6 and 25. What is your locker number? Show or explain how you got your answer.
Click here to see answer by issacodegard(60)

Question 565526: What percent of 72 is 18? Use proportions.
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Question 565526: What percent of 72 is 18? Use proportions.
Click here to see answer by ad_alta(240)

Question 565640: 16 winners out of 200 entries and 28 winners out of 350 entries
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Question 566005: Nine identical pipes can fill a tank in 4hours. Given that the rate of water flow in all the pipes are the same, find how long it would take six of these pipes to fill the same tank.
Click here to see answer by josmiceli(9697)

Question 565997: Suppose that y is directly proportional to x.
If y=12 when x=-4, what is the value of y when x=25?
Click here to see answer by Horlaye(4)

Question 566306: 54 over 72 = x over 100
Click here to see answer by Tias_411(14)

Question 566552: What is 'x' in 20-x/x=6/4
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Question 566744: What is the Ratio in simplest form 28 inches to 40 inches

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Question 567525: 66 is 40% of what number?

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Question 567594: P is inversely proportional to d^2
P = 10,000 when d = 0.4
Find the value of P when d = 0.8
I know that P = k/ d^2
so .. k/ 0.64 = 10,000
but i dont know how to use the numbers given to find the value
Click here to see answer by Earlsdon(6287)

Question 569347: whats 2/5 = 4/n what does n equal

Click here to see answer by IWork4Dessert(60)

Question 569349: i need help with 3/2=18/8

Click here to see answer by solver91311(16897)

Question 569360: four-sevenths of a school's faculty are women. four-fifths of the male faculty members are married, and nine of the male faculty are unmarried. how many faculty members are there?
Click here to see answer by IWork4Dessert(60)

Question 569745: What is the last digit (ones) of the product of the positive prime
numbers less than 50?
Show and explain how you got your answer.

Click here to see answer by Alan3354(30993)

Question 571263: you have a total of 60 cupcakes; 36 are choc. You want 70% choc. How many more cupcakes do you need to bake ?
Click here to see answer by scott8148(6628)

Question 573922: The perimeter of a rectangle is 64 cm. The length is 4 cm less than twice the width. Find the length and widt
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Question 573941: perimiter of rectangle is 64cm the , the length is 4cm less than twice the width find the l&w I tried 4/64=32 2/32=16

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Question 573671: Mr. Green and Mr. Martin played a game of marbles. At first, the ratio of MR.Green;s to Mr. MArtins marbles was 8:3. But then Mr.Green gave 45 of his marbles to Mr. Martin. In the end they both had the same amount of marbles. Howmany marbles did Mr.Green start with?
Click here to see answer by ankor@dixie-net.com(15661)

Question 574151: A can of soda holds 455 milliliters. If you pay 60 cents for a soda, what is the unit price per millilter?

Click here to see answer by stanbon(57412)

Question 574361: ONE NUMBER IS TWICE ANOTHER THE SUM OF THEIR RECIPROCALS IS 1.5 FIND THE NUMBERS
Click here to see answer by Alan3354(30993)

Question 574812: (3x-5)/4=-5/7
Click here to see answer by saifoo.khan(162)

Question 575952: 2. Selecting a Card When a card is selected from a deck, find the probability of getting
a. A club
b. A face card or a heart
c. A 6 and a spade
d. A king
e. A red card

Click here to see answer by 96037614(2)

Question 575991: 13 is 10% of what number

Click here to see answer by stanbon(57412)

Question 576279: If you have a scale that says 1 1/2 inches equals 12 inches, then what does 7/16 equal on this scale? I keep coming up to 3.5 inches, but I want to confirm that is correct....Please help.
Click here to see answer by Alan3354(30993)

Question 577120: x/4 = 2/10
Click here to see answer by jim_thompson5910(28598)

Question 577151: 26 is 60% of what number?
Click here to see answer by jim_thompson5910(28598)

Question 577141: The figures are both regular octagons.
The smaller one has a side length of 4 and the larger one has a side length of 9.
What is the ratio of the perimeter of the smaller figure to the perimeter of the larger figure?
Click here to see answer by Alan3354(30993)

Question 577382: How do you solve this: 0.7(15)-x=0.6(15-x)
Click here to see answer by Maths68(1474)

Question 577918: Solve the problem as directed. Use proportions to find the solution.
The gravitational attraction between two masses varies inversely as the square of the distance between them. If the attraction force between them is 75 lbs. when the bodies are eight feet apart, find the attraction when the masses are twelve feet apart.

Click here to see answer by stanbon(57412)

Question 578153: Jim bought two shirts that were originally marked at $40
each. One shirt was discounted 20% and the other was
discounted 25%. The sales tax was 4.5%. How much did
he spend in all?
Click here to see answer by ad_alta(240)

Question 578681: A sum of money is divided among three people, X, Y and Z, in the ratio 5:3:1. If Y gets Shillings 700 more than Z, calculate how much X gets ?
Click here to see answer by ankor@dixie-net.com(15661)

Question 578870: I'm doing proportions with fractions well at least that's what the lessons called and I need help understanding it
Click here to see answer by stanbon(57412)

Question 574059: solve each proportion
1. n/6= 25/30
2. 6.1/x= 2/3
3. 100/25= t/4
I need help ASAP!
Help!
Click here to see answer by stanbon(57412)

Question 579462: please help me solve this question:
If 13 out of 30 students failed a math test. What is the number of ratio that PASSED?
Click here to see answer by richwmiller(9143)

Question 579467: If a team won 72percent72percent of their games. What is the ratio of games won to number of games lost?
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Question 579467: If a team won 72percent72percent of their games. What is the ratio of games won to number of games lost?
Click here to see answer by dfrazzetto(277)

Question 579466: A model is made of a car. The car is 9 feet long and the model is 10 inches long. What is the ratio of the length of the car to the length of the model?
Click here to see answer by dfrazzetto(277)

Question 580107: If the ratio of A:B is 2:5 and the ratio of B:C is 3:4, then what is the ratio A:C?
Please explain how to solve these type of questions.
Thanks.
Click here to see answer by scott8148(6628)

Question 580099: A group of 10 men can do a job in 50 days. They start the work together, but after x days, 2 men leave the work. The remaining people finish the remaining job in 25 days. What is the value of x ?
Thanks.
Click here to see answer by scott8148(6628)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015