Questions on Word Problems: Mixtures answered by real tutors!

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Question 749841: How much 12% acid must be added to 16 gallons of pure water to get a mixture that is 7% acid?
Click here to see answer by josgarithmetic(39617)

Question 749834: how to mix a 10%solution and a 30% solution to get 1000ml of a 12% solution?
Click here to see answer by josgarithmetic(39617)

Question 749834: how to mix a 10%solution and a 30% solution to get 1000ml of a 12% solution?
Click here to see answer by MathTherapy(10552)

Question 750299: An island has 12 fur seal rookeries (breeding places). To estimate the fur seal pup population in Rookery A, 5758 fur seal pups were tagged in early August. In late August, a sample of 1100 pups was observed, and 285 of these were found to have been previously tagged. Use a proportion to estimate the total number of fur seal pups in Rookery A.
The estimated total number of fur seal pups in Rookery A is ____. (Round to the nearest whole number.)
Additional instructions: Set up a proportion, and then use the cross products principle of proportions. If a/b=c/d, then ad=bc. Be sure to round to the nearest whole number.

Click here to see answer by josgarithmetic(39617)

Question 750329: You have 150ml of pure water, add 5% of salt to the water. how many ml salt water will you have?
Click here to see answer by dkppathak(439)

Question 750350: Please help me solve this word problem about mixtures:
Click here to see answer by ankor@dixie-net.com(22740)

Question 750480: 32litres42mililitre = litre?
Click here to see answer by Alan3354(69443)

Question 750537: 40 cups of juice contains 5% juice. how many cups of pure juice is needed to make 10% juice
Click here to see answer by josmiceli(19441)

Question 750560: Hi, I have an online algebra course and sometimes I find it difficult to solve equations. I was wondering if someone could please help me with this problem? Thank you so much(:
The question is:
Which of the following parabolas match the following graph below?
And then since I couldn't drag and drop the image, I think but am not sure that two points that could be used were 1 and -1.However, to be sure, you can, I believe, go to this link and it should pull up the image.
http://pub.provostacademy.com/suite/repository/workspace/System%20Files/a1p3u3l2aa1.gif
Click here to see answer by MathLover1(20849)

Question 750576: How many cups of pure juice must be added to 40 cups of punch that is 5% juice to obtain punch that is 10% juice
Click here to see answer by josgarithmetic(39617)

Question 750618: How much coffee costing $6.00 per pound should be mixed with 3 pounds of coffee costing $4.00 per pound to create a mixture costing $4.50 per pound?
Click here to see answer by tommyt3rd(5050)

Question 750631: A chocolate drink is 16% pure chocolate by volume. If 13 litres of pure milk are added to 22 litres of this drink, the percent of chocolate in the new drink is approximately
Click here to see answer by lwsshak3(11628)

Question 750796: How many liters of a 7% solution of salt should be added to a 27% solution in order to obtain 780 liters of a 13% solution?

Click here to see answer by josgarithmetic(39617)

Question 750825: How many gallons of 40% antifreeze should be mixed with 10 gallons of 85% antifreeze to obtain 65% antifreeze mixture?
Click here to see answer by stanbon(75887)

Question 750912: please help me find the answer!
suppose you have 80 ml of a solution that is 60% acid and 40% water. how much acid do you need to add to make a solution that is 75% acid.

Click here to see answer by jim_thompson5910(35256)

Question 750955: How much 13% saline solution should be added to 80 cc of 23% saline solution in order to have a 17% solution?
Click here to see answer by josmiceli(19441)

Question 751088: good day my given problem is this
To produce 100 liters that is 17% acid, Liza took some amount from a 40% acid solution and a 60% acid solution then added 70 liters of pure water to the resulting mixture. How much of the 40% acid solution was used?
thank you in advance :)
Click here to see answer by rothauserc(4718)

Question 751163: how much of an alloy that is 20% copper should be mixed with 500 ounces of an alloy that is 60% copper in order to get an alloy that is 30% copper

Click here to see answer by tommyt3rd(5050)

Question 751178: How many gallons of a 10% antifreeze solution and a 25 % Antifreeze solution must be mixed to make 3 gallons of a 20 % antifreeze solution? Solve with equations
Click here to see answer by tommyt3rd(5050)

Question 751344: How would you make 100g of a saltwater solution that is 20% salt and also how many grams of salt and water would you need?
Click here to see answer by josgarithmetic(39617)

Question 751428: A radiator contains 3 gallons of 40% antifreeze solution. How many gallons of pure antifreeze must be added to obtain 50% solution? Please Help!!!
Click here to see answer by jim_thompson5910(35256)

Question 751561: Mary is mixing up some punch for her party tomorrow. She messed up at first and ended up with two different punches, one that was too strong and one that was too weak. The first was too weak, 20 liters of an 18% punch mix and the second was too strong, 50 liters of a 30% mix. She wanted all the punch to have 25% punch mix. How can she mix what she has with water to create the proper punch?
Click here to see answer by josgarithmetic(39617)

Question 751590: A chemist needs 70 milliliters of a 24% solution but has only 18% and 39% solutions available. How many milliliters of each should be mixed to get the desired solution?

Click here to see answer by josgarithmetic(39617)

Question 751662: Can you help me with this word problem? A mechanic has 30 pints of an antifreeze-and-water solution that is 80% antifreeze. How any pints of water should be added to make a solution that is 60% antifreeze?
Click here to see answer by josmiceli(19441)

Question 751935: How many parts of a 3% solution must be mixed with a 30% solution to obtain a 12% solution?
Click here to see answer by tommyt3rd(5050)

Question 751973: A quater of two numbers is 16 and three times the difference of the numbers is 30. Calculate the values of the numbers
Click here to see answer by tommyt3rd(5050)

Question 752121: 12 gallons of 55% acid solution was mixed with 8 gallons of pure water. What is the concentration of the mixture.
Click here to see answer by josmiceli(19441)

Question 752248: How many gallons of a 3.6% salt solution must be mixed with a 7% salt solution to obtain 25 gallons of a 4.5% salt solution
Click here to see answer by josmiceli(19441)

Question 752504: A 10% salt solution is to be mixed with a 20% salt solution to produce 20 gallons of a 17.5% salt solution. How many gallons of the 10% solution and how many of the 20% solution will be needed?
Click here to see answer by tommyt3rd(5050)

Question 752538: In the barn there are 100 kg wheat and rye, rye is 10%. How many kg of wheat should be added which the content of rye to be 4%?
Click here to see answer by malglu(63)

Question 752548: 21 lbs of a metal is 29 percent nickel. it is a combination of metal A which is 35 percent nickel and metal b which is 25 percent nickel. how many pounds is metal A and how many pounds is metal B? The answer should be 8.4 and 12.6 but I don't know why
Click here to see answer by ankor@dixie-net.com(22740)

Question 752567: how many gallons of 20% antifreeze should be mixed with 10 gallons of 83% antifreeze to obtain 55% antifreeze mixture?
Click here to see answer by stanbon(75887)

Question 752567: how many gallons of 20% antifreeze should be mixed with 10 gallons of 83% antifreeze to obtain 55% antifreeze mixture?
Click here to see answer by josgarithmetic(39617)

Question 752859: a chemist has 500 ml of solution that is 18% acid. how many ml of acis is in the solution

Click here to see answer by dkppathak(439)

Question 753075: if i had 1litre of oil that cost $2.80 how much would 150ml cost???
Click here to see answer by rfer(16322)

Question 753337: The Candy Emporium sells two types of candy- type A sells for $1.50 per pound and type B sells for $2.00 per pound. How kuch of each type of candy should be combined to obtain 20 pounds of a mixture which sells for $1.80 per pound?�
Click here to see answer by stanbon(75887)

Question 753448: a 300-milliliter solution consists of 50% water.how many milliiters of water should be added to make solution 90% water
Click here to see answer by josgarithmetic(39617)

Question 753509: How many ml of 30% acid should be added to pure acid to make 40 ml of 70% acid?
Click here to see answer by josgarithmetic(39617)

Question 753680: how much pure acid should be mixed with 3 gallons of 20% acid solution to get a 40% acid solution?
Click here to see answer by tommyt3rd(5050)

Question 753750: A mixture containing 16% of a drug is to be combined with another mixture containing 28% of a drug to obtain 15 ml of a 24% mixture. How much 16% mixture is required?
Click here to see answer by josgarithmetic(39617)

Question 753913: A physicist needs 80 liters of a 30% acid solution. He has a 20% acid solution and a 60% acid solution. How many liters of each 20% and 60% does he need to total 80 liters of a 30% acid solution?
Click here to see answer by josgarithmetic(39617)

Question 753995: how many liters of 10% silver iodide solution must be mixed with 3 litters of a 4% silver iodide solution to get a %6 solution?
Click here to see answer by josgarithmetic(39617)

Question 754111: how much of an alloy that is 40 copper should be mixed with 100 ounces of an alloy that is 90% copper in order to get an alloy that is 50% copper?
Click here to see answer by lwsshak3(11628)

Question 754290: How many ounces of a silver alloy that costs $5.50 per ounce should be mixed with one that costs $9.00 per ounce to make a new 30-ounce alloy that costs $7.60 per ounce?
Click here to see answer by josgarithmetic(39617)

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