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Question 127817: This is a question I missed from a recent test. I'm beating my head against the wall trying to figure this out. Thanks in advance for any help you can provide.
How much of a 75% chemical solution must be mixed with a 25% solution to make 10 liters of a 40% solution?
Click here to see answer by solver91311(16868)

Question 127696: 4,000 ML is to ______ L
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Question 127917: Keil is going to make 13 pounds of mixed nuts for a party. Peanuts cost $3.50 per pound and fancy nuts cost $7.50 per pound. If Keil can spend $85.50 on nuts, how many pounds of each should he buy?
Click here to see answer by mr.barrett(5)

Question 128070: How many pounds of coffee at 4.00 a pound must be mixed with coffee at 20.00 a pound to make 50 pounds of coffee that are worth 10.00 a pound?
Click here to see answer by checkley71(8403)

Question 128222: The Nut Barn needs 10 pounds of mixed peanuts and cashews to sell for $8.50 per pound. Cashews alone sell for $10 per pound and peanuts for $7.50 per pound. What is the amount of cashews that can be in the mixture and hold the price to $8.50 per pound?
a. Choose a variable to represent the number of pounds of peanuts. Then find the number of pounds of cashews to be added to make 10 pounds total. Now figure out the cost of the amount of each nut in the mixture.
b. Write the equation.
c. Solve the equation
Click here to see answer by checkley71(8403)

Question 128288: Ziggys yogurt blends reg. yogurt that is 3% fat with its no-fat yogurt to obtain low fat yogurt that is 1% fat. How many pounds of reg. yogurt and how many pound of no-fat yogurt should be mixed to obtain 60 pounds of low fat yogurt.
Click here to see answer by ptaylor(2048)

Question 128369:
nail polish remover is a mix of water & acetone. How much acetone must be combined with a solution that is 28% acetone to make 24 oz of a 58% solution?
Click here to see answer by checkley71(8403)

Question 128656: I need help solving this problem. Please help.
You need a 21% salt solution to fill your fish tank. How much of the 15% salt solution should be added to 12 gallons of the 25% salt solution to create the desired salt solution?
Click here to see answer by ptaylor(2048)

Question 128861: I need help with this word problem. Thanks in advance!
A goldsmith has two alloys that are different purities of gold. The first is three-fourths pure gold and the second is five-twelths pure gold. How many ounces of each should be melted and mixed in order to obtain a 6-oz. mixture that is two-thirds pure gold?
I have come up with:
First + Second = Mixture
x + y = 6 oz
3/4 + 5/12 = 2/3
3/4x + 5/12y = ?4
Click here to see answer by stanbon(57203)

Question 129407: the sbc bookstore sold 348 notebooks during the first day of school, some at P 22.50 each and the rest at P 34.20 each. the total amount taken in for the notebooks was taken in for the notebooks was P 9081.90. How many of each kind were sold?

Click here to see answer by checkley71(8403)

Question 129527: the minimum daily values (MDVs) for certain foods are given. They are based on a 2,000 calorie per day diet. Find decimal and fractional notation for the percent notation in each sentence.
a) 1 ounce of Tositos provides 9% of the MDV of fat.
b) 1/2 cup of Campbells' New England clam chowder provides 6% of the MDV of iron.
Click here to see answer by josmiceli(9645)

Question 129542: 12 students earned a's. this was 3/8ths of the students in the class. How many students are in the class?
Click here to see answer by ilana(307)

Question 129581: I've been stuck on this problem: The Middle School sold booklets of ride tickets for its Fall Carnival. Twenty times as many 8-ticket booklets as 20-ticket booklets were sold. A total of 3600 tickets were sold. How many 20-ticket booklets were sold?
Click here to see answer by josmiceli(9645)

Question 129615: How many gallons each of 25% alcohol and 35% alcohol should be mixed to get 20 gallons of 32% alcohol?
Click here to see answer by kev82(148)

Question 129736: the sum of two numbers is 90. The larger number is twice he smaller number. What are the two numbers?
Click here to see answer by bucky(2189)

Question 129768: How many pounds of seed worth $0.60 a pound must be mixed with 300 pounds of seed worth $0.35 a pound to get a mixture worth $0.50 per pound
Click here to see answer by oscargut(891)

Question 130101: STANDARD QUALITY COFFEE FOR $18.00/KG AND PRIME QUALITY COFE SELLS FOR $24.00/KG. WHAT QUANTITY OF EACH SHOULD BE COMBINED TO PRODUCE 40KG OF A BLEND TO SELL FOR $22.50/KG?
Click here to see answer by checkley71(8403)

Question 130412: four pencils and 2 pens cost $2.26. six pencils and five pens cost $5.17. find the cost of the pencil. find the cost of the pen
Click here to see answer by checkley71(8403)

Question 130390: I have a word problem, think I have an answer. Could you let me know for sure.
A chemist is making 200 Liters of solution that is 62% acid. He is mixing 80% acid solution with a 30% acid solution. How much of the 80% acid solution will he use? I have 68 liters. Could you let me know if this is correct, thank you I really appreciate the help.
Click here to see answer by scott8148(6628)

Question 130391: I have a world problem, not sure if I came up with the right answer. Could I have some help on this, thanks. The good seed flower shop sells its own brand of fertilizer. It mixes one brand of fertilizer that contains 7% nitrogen with another that contains 8% nitrogen. The resulting mixture contains 7.7% nitrogen. How many pounds of the 8% fertilizer must be used to make 200 pounds of the 7.7% mixture? I have 98.6 Could you let me know if it is correct. Thank you, I appreciate the help.
Click here to see answer by checkley71(8403)

Question 130568: A deal has two kinds of mets; one costs 90 cents a pound, the other 60 cents a pound. He wishes to make 50 pounds of a mixture that will cost 72 cents a pound. How many pounds of each kind should he use?
Click here to see answer by ptaylor(2048)

Question 130953: Julie is mixing orange juice. She adds water to the concentrate until she has 2 liters of juice which is 60% concentrate. She then adds some leftover juice which is 75% concentrate. If the result is 65% concentrated juice, how many liters of the stronger mix did she add?
Click here to see answer by stanbon(57203)

Question 131154:
Hawaiiain punch is 10% fruit juice. How much water would you have to add to one gallon of hawaiiain punch to get a drink that is 6% fruit juice?
my homework is 1 thru 41 odd, been able to solve all but #39. on the above I cannot figure out how to set it up. Thank you in advance for any help
Click here to see answer by Edwin McCravy(8879)

Question 131491: 66 kilograms of cement is mixed with 22.5 kilograms of water. However, the mixture is supposed to be 40% water in order to dry properly. Find the amount that should be added.
Please help, thanks!
Click here to see answer by stanbon(57203)

Question 131490: An aircraft parts company has 130kg of an alloy that is 80% aluminum and 20% magnesium. How much pure magnesium should be added, so that the content is raised to 35%?
Please help, thanks!
Click here to see answer by 067isa(13)

Question 131465: "ORANGE THIRST" IS 15% ORANGE JUICE AND "QUENCHO" IS 5% ORANGE JUICE. HOW MANY LITERS OF EACH SHOULD BE COMBINED IN OREDER TO GET 10LITERS OF A MIXTURE THAT IS 10% ORANGE JUICE?
THANKS FOR YOUR HELP
Click here to see answer by ptaylor(2048)

Question 132225: In the lab there is a vat of a solution of 20% acid and another vat of solution of 50% acid. How much of the 50% acid solution should be mixed with the 20% solution to have 12 gallons of a 30% acid solution?
This was a test question the answer was 4 gallons.
No matter what I try I can't get this answer.
I've tried
.20x+.30(12)=.50(x+12)
.20x+.50(x+12)=.30(12)
.30(12) +.50(x-12)=.20x
(.20x+.50y)/12=30
Click here to see answer by Earlsdon(6287)

Question 132414: Beatrice can wallpaper a room in 8 hrs.... What amm i suppose to do? All i can think of write is "good job for beatrice! Want me to throw a party for you?!"
Also Marty read a novel in 10 hours... i don't get it what aare they asking me to do?! Please help me! Or i'm just going to write down "I can read the Hp and the deathly hallows in 10hrs and 7 min! Ha beat that!"...seriously my teacher will say i'm being a smart ass...
Click here to see answer by solver91311(16868)

Question 132659: A nontoxic floor wax can be made by combining lemmon juice and food-grade linseed oil. The amout of lil should be twice the amount of lemmon juice. How much of each ingredient is needed to make 32oz of floor wax? The mix should be spread on a rag and buffed dry.
Click here to see answer by stanbon(57203)

Question 132710: Need help with setting up a mixture problem.
How many gallons of a 15% salt solution msut be mixed with four gallons of 20% salt solution in order to make a 17% salt solution?
please and thank you
Click here to see answer by stanbon(57203)

Question 132714: Good evening, please assist me with the following question:
Does lovastation (a cholesterol-lowering drug) reduce the risk of heart attack? In a Texas study, researchers gave lovastatin to 2,325 people and an inactive substitute to 2,081 people (average age 58). After 5 years, 57 of the lovastatin group had suffered a heart attack, compared with 97 for the inactive pill. (a) State the appropriate hypothesis. (b) Obtain a test statistic and p-value. Interpret the ressults at a=.01. (c) is normality assured? (d) Is the difference large enough to be important? (e) What else would medical researchers need to know before prescribing this drug widely? (Data are from Science News 153 (May 30, 1998), p. 343.)
Click here to see answer by stanbon(57203)

Question 132885: i need help with this word problem can anyone help me?
Soybean meal is 16% protein, COrnmeal is 8% portein. Howmany pounds of each should be mixed together in order to get a 320lb mixture that is 14% proetien?
Cornmeal__________pounds
Soybean____________pounds
Click here to see answer by ptaylor(2048)

Question 132924: A spice mixture is 25% thyme. How many grams of thyme must be added to 12 g. of the misture to increase the thyme content to 40%?
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Question 132924: A spice mixture is 25% thyme. How many grams of thyme must be added to 12 g. of the misture to increase the thyme content to 40%?
Click here to see answer by nycsharkman(136)

Question 132903: Chapter 7 Review Page 388
25.A furniture finish consists of turpentine and linseed oil. It contains twice as much turpentine as linseed oil. If you plan to make 16 fluid ounces of furniture finish, how much turpentine do you need?
Solve with Substitution, Elminination, or Graphing.
Click here to see answer by ptaylor(2048)

Question 133092: You have 2 gallons of a punch solution that contains 2% alcohol; how much pure punch must be added to the punch to reduce the alcohol level to 1.5%
Am clueless and very frustrated! Converted gallons into ounces and tried to set up an equality. Came out with answer of 85.33 ounces of pure punch to be added...???????????????
Click here to see answer by vleith(2825)

Question 133718: How many liters of pure water (o% salt) must be added to 5 liters of an 85% salt solution to dilute it so a 68% salt solution?
Click here to see answer by ptaylor(2048)

Question 133669: John runs a garage. He needs to mix antifreeze in such a way as to produce 20 quarts of 50% solution. He has on hand ample supplies of 25% and 75% solutions. How much of 25% and 75% solutions must he mix together to produce the needed 20 quarts of 50% solution?
Click here to see answer by ptaylor(2048)

Question 133725: I usually do really well with most of these mixture problems, but this one has me stuck:
A forester mixes gasoline and oil to make 2 gallons of a mixture for his two-cycle chainsaw engine. This mixture is 32 parts gasoline and 1 part two-cycle oil. How much gasoline must be added to bring the mixture to 40 parts gasoline and 1 part oil? Question 72, page 108, College Algebra, 7th Edition, Larson/Hostetler
Thank you!
Jasmine
Click here to see answer by kev82(148)

Question 133858: Want to make 30 bounds of a bird seed that costs $3 per pound. They are using thistle seed for $2 per pound and sunflower seeds for $3.50 per pound. How many pounds of sunflower seeds should be used in this mixture?
algebra 1
Click here to see answer by checkley71(8403)

Question 133896: An auto mechanic has 300mL of batter acid solution that is 60% acid. He must add water to this solution to dilute it so that it is only 45% acid. How much water should he add?
Click here to see answer by ptaylor(2048)

Question 133977: It takes Bob three hours to mow a lawn, and John can mow the same lawn in 2 hours. How long would it take the two of them working together to mow that lawn?
Click here to see answer by solver91311(16868)

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