Questions on Algebra: Proportions answered by real tutors!

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Question 594368: An army of 2400 men has a stock of food sufficient for 50 days. After 10 days 800 men joined the army. For how many days will the food be sufficient now? If the ratio of one was reduced by 1/3 for how many days will the stock last?
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Question 594754: PLEASE HELP ME
A SEAMSTESS IS MEASURING A MODEL FOR A NEW DRESS. THE TAPE MESAURE IS MARKED IN CM. THE SEAMSTRESS NEEDS TO CONVERT THAT MEASURMENT INTO INCHES. IF THE MODELS WAIST MEASURMENT IS 65.4 CM, WHAT IS THE CONVERSOION IN INCHES?

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Question 595187: 15 men working 7 hours a day can finish a piece of work in 15 days. How many days will it take for 12 men working 8 hours a day to finish it?
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Question 595340: An old pump takes 6 hours longer to empty a pool than does a new pump. With both pumps working, the pool can be emptied in 4 hours. Find the time for the new pump working along to empty the tank
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Question 595502: There are 991 people at the annual comic book convention. Sixty percent of the people at the convention are under 30 years old. Estimate the number of people at the convention who are under 30 years old.
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Question 595793: please help me solve this proportion: 8/3+g/3
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Question 596289: A woman who is 5 feet tall casts a 12-foot shadow across a lawn while a nearby tower casts a 42-foot shadow. How tall is the tower?
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Question 596456: Which of the following numbers is equivalent to 45%?
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Question 596455: The scale on a map reads 1 inch = 12 miles. How many miles apart are the two cities that are 2 3/4 inches apart on the map?
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Question 596460: Yashae has $21 and wants to buy as much granola as possible. If granola is $2.89 per pound, which answer below represents the approximate amount of granola that Yashae can buy?
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Question 596496: Please help me solve this problem!!
Find P(rolling 2 or 5) with one number cube.

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Question 596755: what is the ratio of 12 to 17 using fractional notation
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Question 597159: what is the ratio of 17 1/2 inches to 2 1/3 feet? Not sure how to start the problem , do I convert the fraction into a mixed number or just work with the improper fraction?
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Question 597276: 9.9 divide by 0
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Question 597466: The diameter of the moon is 2160 miles. A model has a scale of 1 in : 150 mi. What is the diameter of the model?
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Question 597540: A pound of grass seed covers 120 square feet of lawn. How many pounds are needed to seed a lawn measuring 50 by 40 feet? Please help me answer and explain how you come up with correct answer.
Thank You

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Question 598762: 5. If the surface area of a cube is decreased by 19%, the volume of the cube decreases by
(A) 9%(B) 19%(C) 27.1%(D) 37.1%(E) 85.2%

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Question 599506: in the right triangle the ratio of the measures of the three sides is 10:24:26, and its perimeter is 180 cm find the measure of the shortest side of the triangle
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Question 600599: Use a proportion to answer the question in terms of x. What percent of 5x is 3x?
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Question 601325: if y is proportional to 2x-7,and y=-9 when x=2,find x when y=-15.Please show me step by step.
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Question 601475: what is the ratio of x to y if ((2x-3y)/4))=((3x-2y)/5). Please show me step by step.
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Question 603458: 4837.86 is 6% of x. What is x?
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Question 603883: Please help me solve this equation: +x%5E2-2x-3=+sqrt%28+4+%29+.
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Question 603905: My homework says; Use cross Products to determine whether or not the ratio is a proportion. Select = on the blank if the pair of ratios is a proportion; select not = if it is not.
the work problem look like this;

_5_
8
Select = ≠
_20__
30

I don't understand how to do this or how to do it.

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Question 603938: a ranger wants to figure out how much deers are in a forrest, he caught 228 deers, tagged them and release them. then he caught 89 deers, 85 of those were tagged. what is the total number of deers in the forrest?
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Question 604271: 130% of what number is 169?
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Question 604271: 130% of what number is 169?
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Question 604952: what percent of 136 is 850?
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Question 605566: A 3.5 ft child cast a 60 in. shadow. She is standing next to a telehone pole that casts a 50 ft. shadow. How tall is the telephone pole?
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Question 605584: what number is 52% of 625
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Question 605590: 15 is 60% of what number?
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Question 605586: What number is 0.5% of 3400?
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Question 605741: The ratio of men to women working for a company 6 to 5. If there are 253 employees total,how many women work for the company?
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Question 605946: If I type a page in x minutes and my friend types a page in x-1 minutes how long to type 100 pages together?
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Question 606872: x 6
12 7

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Question 606982: Jake spent 3/8 of his money on videotape and 1/2 of what was left on a cassette Tape. he now has $6.25. How much money did he start with?
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Question 607042: 3 1/3 divided by 1 5/9
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Question 607067: If it takes 16 faucets 10 hours to fill 8 tubs, how long will it take 12 faucets to fill 9 tubs?
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Question 607106: If s varies directly as t2, and s = 125 when t = 5, find s when t is 7.
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Question 607105: If x varies inversely as y2, and x = 2 when y = 10, find x when y = 2.
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Question 606454: My math problem is this: A 6-oz box of candy has 350 calories. How many calories would a 10-oz box contain?
I worked the problem, but don't think my answer is correct. Can you look over my work and tell me if this is right?
6/350 = 10/x, 6x/6 = 3,500/6,
so x = 583.3

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Question 607069: on a blueprint of a park, 1 foot represents 1/2 mile. If an error of 1/2 inch is made in reading the blueprint, what will be the corresponding error on the actual park?
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Question 607024: How can I identify which tables of values represents an exponential function?

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Question 607068: A certain company increased its prices by 30% during 1992. Then in 1993 it was forced to cut back its prices by 20%. What was the net change in price?
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