Questions on Word Problems: Mixtures answered by real tutors!

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Question 533600: How do you solve this:
A chemist has 12 liters of a 25% acid solution. How many liters of water must be added to obtain a 20% solution?
Click here to see answer by mananth(16946)

Question 533773: two alcohol substances, a 15% solution and a 45% solution. How much of each solution should be used to obtain 300 milliliters of a 25% solution?
Click here to see answer by mananth(16946)

Question 533905: I started at x(2.6) + 4y (4*4.4) =4444
That is not going to work to get to how many standard version downloads there were-Help- i am totally stuck!
A Web music store offers two versions of a popular song. The size of the standard version is 2.6 megabytes (MB). The size of the high-quality version is 4.4 MB. Yesterday, the high-quality version was downloaded four times as often as the standard version. The total size downloaded for the two versions was 4444 MB. How many downloads of the standard version were there?
Click here to see answer by solver91311(24713)

Question 534086: A silversmith has two alloys, one containing 70% silver and the other 20% silver. How much of each should be melted and combined to obtain 500 grams of an alloy containing 55% silver?
Click here to see answer by KMST(5328)

Question 534270: A merchant has coffee worth $60 a pound that she wishes to miz with 70 pounds of coffee worth $90 a pound to get a mixture that is worth $70 a pound. How many pounds of the $60 coffee should be used?
Click here to see answer by fcabanski(1391)

Question 534337: pure acid is to be added to a 10% acid solution to obtain 42 L of a 40% acid solution. What amounts of each should be used?
blank L of pure acid solution and blank L of 10% acid solution
Click here to see answer by oberobic(2304)

Question 533776: If 42 ounces of red beads that sell for $7 per ounce are mixed with 58 ounces of golden beads that sell for $10 per ounce, what should be the selling price for the mixture of beads?
Click here to see answer by Maths68(1474)

Question 534456: John bought two horses at rs 20,000 each.he sold one horse at 15% gain. But he had to sell the second horse at a loss.if he had suffered a loss of rs 1800 on the whole transaction,find the s.p of the second horse.
Click here to see answer by mananth(16946)

Question 534553: I am having trouble with this lesson, I've tried this problem and cannot figure it out. If you could please help me understand the process that would be wonderful.
A dairy needs 255 gallons of milk containing 5% butterfat.
How many gallons each of milk containing 6% butterfat and milk containing 1% butterfat must be used to obtain the desired 255 gallons?
I have a box for each % of butterfat used(____of 5% ____of 1%)

Click here to see answer by Maths68(1474)

Question 534844: Two trucks leave the same place at the same time, traveling in opposite directions. One is traveling 10 mph faster than the other. After 3 hours, the trucks are 240 miles apart. How fast is each traveling?
Click here to see answer by josmiceli(19441)

Question 534837: How much water must be added to 20 ounces of a 60% saline solution to obtain a 45% saline solution?
Click here to see answer by josmiceli(19441)

Question 535116: 9.6 L = mL

Click here to see answer by rfer(16322)

Question 535157: If I had 7 pints of water and I drank all 7 pints how much water did I drink in quarts?
Click here to see answer by Iluvidina(15)

Question 535257: How much water must be added to 12 L of a 40% solution of alcohol to obtain a 30% solution?

Click here to see answer by KMST(5328)

Question 535441: A grocer mixes walnuts selling at 55 cents a pound and almonds selling at 70 cents a pound, making a mixture of 30 pounds to sell at 61 cents. How many pounds of walnuts should he use? Represent the walnuts with x and the almonds with y. transale the word statement in 2 equations. I tried this for about 30 minutes. so far i got x + y = 30 and 55x + 70y = 610.
Click here to see answer by stanbon(75887)

Question 535948: i need help wording this problem for my nursing class.
a patient puked up 13 & 1/3 ounce.
do i write it
13 ounces & 1/3 ounce OR
13 cups &1/3 ounce?
Click here to see answer by jim_thompson5910(35256)

Question 535958: How much water must be evaporated from 200lbs of a 10% salt solution to yield a solution that is 20% salt?
Click here to see answer by richwmiller(17219)

Question 536135: I need to know how to convert 675 mg to grams step by step.
Click here to see answer by Alan3354(69443)

Question 536192: How much soli containg 45% sand do you need to add to 1 ft^3 of soil containing 15% sand in order to make a soil containing 35% sand?
Click here to see answer by josmiceli(19441)

Question 536330: If a 20 lb Turkey takes 3 hours to fully cook at 350 degrees,
how long do you need to cook it at 250 degrees?
Happy Thanksgiving!
Click here to see answer by Alan3354(69443)

Question 536330: If a 20 lb Turkey takes 3 hours to fully cook at 350 degrees,
how long do you need to cook it at 250 degrees?
Happy Thanksgiving!
Click here to see answer by april4869(19)

Question 536348: if I have a 12gallon cooling system. I add 8 gallons of antifreeze and 4 gallons of water, what is the ratio in percentage?
Click here to see answer by josmiceli(19441)

Question 536455: Over a two hour time period a snail moved 76 inches. How far is this in yards?
Write your answer as a whole number or a mixed number in simplest form. Include the correct unit in your answer.
Click here to see answer by fcabanski(1391)

Question 536473: Katie has 30 coins. Some are dimes and some are nickels. In all she has $2.10. How many nickels and dimes does she have?
Click here to see answer by josmiceli(19441)

Question 536485: Charles is doing an experiment that calls for a 40% solution of copper sulfate. He has 60 mL of a 25% solution. How many milliliters of a 70% solution should Charles add to obtain the required 40% solution?
Click here to see answer by josmiceli(19441)

Question 536491: Susan wants to mix 10 pounds of Virginia peanuts that cost $3.50 a pound with Spanish peanuts that cost $3.00 a pound to obtain a mixture that costs $3.40 a pound. How many pounds of Spanish peanuts should she use?
Click here to see answer by josmiceli(19441)

Question 536493: An advertisement for a pineapple drink claims that the drink contains 15% pineapple juice. How much pure pineapple juice would have to be added to 8 quarts of the drink to obtain a mixture containing 50% pineapple juice?
Click here to see answer by josmiceli(19441)

Question 537043: the ratio of sand to cement in a mixture of concrete is 4:5. how much of each ingredient is there in 144kg of this mixture?
could u please give me the way it is done? thank you in advance.
Click here to see answer by mananth(16946)

Question 537454: John invested a portion of $15,000 at 10% annual interest and the rest at 6% annual interest. If he earned $1,260 for the year from the two accounts, how much did he invest at 10%?
Click here to see answer by mananth(16946)

Question 537453: How much pure acid should be mixed with 5 gallons of a 70% acid solution in order to get a 90% acid solution?
Click here to see answer by mananth(16946)

Question 537492: How many grams of pure acid and how many grams of a 40% solution should be mixed together to get a total of 30 grams of a 60% solution?
Click here to see answer by mananth(16946)

Question 538171: How many ounces of 17 % alcohol solution and 39 % alcohol solution must be combined to obtain 88 ounces of 31% solution?
Click here to see answer by josmiceli(19441)

Question 538397: An engineer wants to make a 40% cement mixture. How many pounds of a 60% cement mixture must she mix with 12 pounds of a 30% mixture to create a 40% cement mixture?

Click here to see answer by stanbon(75887)

Question 538848: A plane flying with the jet stream flew from los angeles to chicago, a distance of 2250 mi, in 5 h. Flying against the jet stream, the plane could fly only 1750 mi in the same amount of time. Find the rate of the plane in calm air and the rate of the wind.
Click here to see answer by oberobic(2304)

Question 538882: how much pure antifreeze must be added to 12 gallons of 10% to make a 80% antifreeze solution?
Click here to see answer by unlockmath(1688)

Question 539517: Candy worth $3.25 a pound was mixed with candy worth $2.70 a pound. How many pounds of each were used if there was three times as much of the $2.70 as the #3.25 candy and if the value of the mixture was $90.80.
Click here to see answer by oberobic(2304)

Question 539577: Natalie mixed 11 oz. of peanuts with 9 oz. of mixed nuts containing 60% peanuts. Peanuts are what percent of the new mixture?
What do x and y represent?
Click here to see answer by stanbon(75887)

Question 539973: A NONTOXIC FLOOR WAX CAN BE MADE FROM LEMON JUICE AND LINSEED OIL. THE AMOUNT OF OILD SHOULD BE TWICE THE AMOUNT OF LEMON JUICE. hOW MUCH OF EACH INGREDIENT IS NEEDED TO MAKE 33 OUNCES OF FLOOR WAX? LET X REPRESENT THE NUMBER OF OUNCES OF LEMON JUICE AND Y THE NUMBER OF OUNCES OF LINSEED OIL
Y =
X + Y =
Click here to see answer by stanbon(75887)

Question 540371: How many liters of pure acid must be added to 5L of a solution that is 20% acid to make a solution that is 60% acid?
x+0.2 (5)= 0-6 (x=5)
x=1= o.6x+3
-0.6x-1-0.6x-1
____________________
0.4x=2
______
0.4 0.4
x=5
Does my work look correct?
Click here to see answer by josmiceli(19441)

Question 540470: how much water should be added to 10liter of 50% acid solution to dilute it to a 20% solution
Click here to see answer by josmiceli(19441)

Question 540695: The Sum of the digits of a two-digit number is 10. The ones digit is six more than the tens digit. What is the number ?
Click here to see answer by oberobic(2304)

Question 540697: Johnny left his office and took the elvator down 4 floors to the cafeteria. He then went up 21 floors to the meeting on the 28th floor. Where is Johnny's office located ?
Click here to see answer by oberobic(2304)

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