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Question 721859: A 40% salt solution and a 85% salt solution are combined yielding 30L of 70% salt solution . What are the respective volumes of the 40% and 85% solutions?
Click here to see answer by lwsshak3(11628)

Question 721917: how many pounds of coffee worth $1.44 a pound should be mixed with 20 pounds worth $1.80 a pound to produce a mixture worth $1.56 a pound?
Click here to see answer by lwsshak3(11628)

Question 721931: A chemist has 40 ounces of a solution of iodine and alcohol that is 15% iodine. How much pure iodine must be added to make a solution that is 20% iodine?
Thank you.

Click here to see answer by lwsshak3(11628)

Question 721945: how much of 75% copper alloy should be melted into 62 kg of a 35% copper alloy to produce an alloy which is 50 % copper?
Click here to see answer by mananth(16946)

Question 722065: How many pounds of coffee that is 40% java beans must be mixed with 70 pounds of coffee that is 30% java beans to make a coffee blend that is 34% java beans?
I got 40x+34(70-x)=30(70)
40x+2380-34x=2100
6x+2380=2100
6x=-280
x= -46.60
This just doesn't seem right to me...help????
Click here to see answer by josgarithmetic(39616)

Question 721946: A mechanic has 352 gallons of gasoline and 15 gallons of oil to make gas/oil mixtures. He wants one mixture to be 9% oil and the other mixture to be 2.5% oil. If he wants to use all of the gas and oil, how many gallons of gas and oil are in each of the resulting mixtures?
Click here to see answer by jsmallt9(3758)

Question 722182: You need to make 1.5 liters of a 30% salt solution. How much salt do you need? Be sure to include proper units
Click here to see answer by josmiceli(19441)

Question 722259: if you weigh 180 pounds and made up of 70% of water how many pounds of water are you made up of
Click here to see answer by checkley79(3341)

Question 722341: How many liters of 70% acid solution must be mixed with 10% acid solution to get 480 L of a 60% acid solution
Click here to see answer by stanbon(75887)

Question 722476: The owner of a fruit stand combined cranberry juice that cost $5.60 per gallon with 50 gal of apple juice that cost $4.24 per gallon. How much cranberry juice was used to make the cranapple juice if the mixture cost $5.00 per gallon?
Click here to see answer by josgarithmetic(39616)

Question 722512: How many ounces of a 17% acid solution and a 56% acid solution are needed to obtain 10 ounces of a 34% acid Mixture?
Click here to see answer by jim_thompson5910(35256)

Question 722539: You need 350 mL of a 40% alcohol solution. On hand, you have a 35% alcohol mixture and a 60% alcohol mixture. How much of each mixture will you need to obtain the desired solution?

Click here to see answer by fcabanski(1391)

Question 722538: Jessica has money in two savings accounts. One rate is 10% and the other is 15%. If she has $450 more in the 15% account and the total interest is $258, how much is invested in each savings account?
Click here to see answer by lwsshak3(11628)

Question 722517: A chemist has 10g of a 20% salt solution. How many grams of water should she add to produce a 5% salt solution?
Click here to see answer by josgarithmetic(39616)

Question 722556: I have a problem that I need help with if possible. How many ounces of pure chocolate must be added to 120 ounces of chocolate topping that is 50% chocolate to make a topping that is 70% chocolate?
Click here to see answer by josgarithmetic(39616)

Question 722703:
A druggist needs 20 oz of a 20% Phenobarital solution, but he only has a 5% solution and a 25% solution in stock. How many ounces of each available solution would he need to make the 20% solution he needs?
Click here to see answer by checkley79(3341)

Question 722923: A 50% alcohol solution is mixed with a 10% alcohol solution to create 8 ounces of a 32% alcohol solution. how much of each is needed.
thanks
Click here to see answer by lwsshak3(11628)

Question 722983: a metal alloy weighing 2 lb & containing 88% iron is melted & mixed with 10 lb. of pure iron. what percent of the resulting alloy is iron?
Click here to see answer by josgarithmetic(39616)

Question 723201: It takes Ralph 6 hours to paint a fence. Lisa can do the same job in 10 hours. If Ralph paints alone for 30 minutes before Lisa begins helping, how long must they work together to finish painting the fence? Give your answer to three decimal places.

Click here to see answer by josmiceli(19441)

Question 723297: How much water should be added to 40 liters of a 75% acid solution to dilute it to 60%? I know the current solution has 30 liters of acid (.75x40), but I'm having difficulty with the equation for the dilution.
Click here to see answer by Edwin McCravy(20054)

Question 723331: A car radiator is filled with 4 gal of a 30% antifreeze solution. How much pure antifreeze must be added to have a 75% antifreeze solution?
Click here to see answer by stanbon(75887)

Question 723428: Please help me solve this problem:
1 L of a 73% saline solution was mixed with 2 L of a 37% solution. What is the concentration of the mixture?
I tried to make a chart using the information given but I'm stuck.
Click here to see answer by Alan3354(69443)

Question 723473: if 90% of a drink is real fruit juice, what fraction is not real fruit juice?

Click here to see answer by rfer(16322)

Question 723685: the cost for i half pound of candy is 7 dollars at his rate how much is 6 pounds
Click here to see answer by unlockmath(1688)

Question 723767: how much of a 14% acid solution should be added to 20 ml of a 8% acid solution to increase it to a 12% acid solution
Click here to see answer by josgarithmetic(39616)

Question 723790: Tea worth 490 pesos per kilo is to mixed with tea worth 490 pesos per kilo how many kilos of each should be mixed to obtain 25 kilos of a blend worth 440pesos per kilo?
Click here to see answer by richwmiller(17219)

Question 723830: A chef is using a mixture of two brands of Italian dressing. The first brand contains 9% vinegar and the second brand contains 14% vinegar. The chef wants to make 400 milliliters of a dressing that is 11% vinegar. How much of each brand should she use?

Click here to see answer by richwmiller(17219)

Question 723854: How much pure acid should be mixed with 2 liters of a 40% acid solution in order to get 70% acid solution?
Click here to see answer by Alan3354(69443)

Question 723937: a solution of 40% acid and a solution of 70% acid need to be mixed together to create a solution of 50% acid. how many milliliters of 40% acid should be mixed with 80 milliliters of 70% acid to get the desired mixture?
Click here to see answer by stanbon(75887)

Question 723962:
How much of a 75% copper alloy should be melted into 62 kg of a 35% copper alloy to produce an alloy which is 50% copper?
Click here to see answer by checkley79(3341)

Question 724232: please help

how much water must be mixed with 8 pints of a solution that is 90% developer to produce a mixture that is 26% developer?

Click here to see answer by checkley79(3341)

Question 724361: How many liters of a 20% salt solution must be added to 45 liters of a 60% salt solution, in order to produce a 35% salt solution? If possible, could you write out how it would be done?
Click here to see answer by josmiceli(19441)

Question 724631: 5850 is compound semiannually at a rate of 12% for 17 years how do you work this problem to get the answer.

Click here to see answer by stanbon(75887)

Question 725032: The manager of a coffee shop has one type of coffee that sells for $6 per pound and another type that sells for $15 per pound. The manager wishes to mix 70 pounds of the $15 coffee to get a mixture that will sell for $12 per pound. How many pounds of the $6 coffee should be used?
Click here to see answer by josgarithmetic(39616)

Question 725210: How many gallons of a fruit punch containing 20% alcohol should be mixed with 2 gallons of fruit punch containing 15% alcohol to obtain a fruit punch mixture that is 18% alcohol?

Click here to see answer by stanbon(75887)

Question 725209: A fruit punch that is 40% alcohol is mixed with a fruit punch that is 30% alcohol. How many gallons of each punch are used to make 5 gallons of punch that is 36% alcohol?
Click here to see answer by stanbon(75887)

Question 725231: determine the number of gallons of a 15% acid solution, 75% acid solution, and a 60% acid solution that are required to make 100 gallons of 51% acid,IF the sum of three times the number of gallons of a 15% acid solution and a 75% acid solution is thirty more than the number of gallons of 60%?
Click here to see answer by josgarithmetic(39616)

Question 725241: Franco Manue runs a grocery store. He wishes to mix 30 pounds of coffee to sell for a total cost of $170. To obtain the mixture, he will mix coffee that sells for $5.20 per pound with coffee that sells for $6.30 per pound. How many pounds of each coffee should he use.
Click here to see answer by josgarithmetic(39616)

Question 725240: Scott's Winterizer Lawn Fertilizer is 22% nitrogen. Schultz's Lime with Lawn Fertilizer is 4% nitrogen. William Weaver, owner of Weaver's Nursery, wishes to mix these two fertilizers to make 400 pounds of a special 10% nitrogen mixture for midseason lawn feeding. How much of each fertilizer should he mix?
Click here to see answer by josmiceli(19441)

Question 725264: The Healthy Favorites Juice Company sells apple juice for 8.3 cents an ounce and raspberry for 9.3 cents and ounce. The company wishes to market and sell 8 ounce cans of apple raspberry juice for 8.7 cents an ounce. How many ounces of each should be mixed?
Click here to see answer by ankor@dixie-net.com(22740)

Question 725315: A trucking company has 1000 liters of coolant. The coolant is 30% antifreeze. How much water should be added to make the mixture 25% antifreeze?
I've tried a porportion; {{ 1000/b=25/100}} then I cross multiplied to get, 25b=100,000. After that I divided both sides to get b=4,000 liters of water. I'm not positive that is the answer.
Thank you for your help.
Click here to see answer by josmiceli(19441)

Question 725387: How many liters of pure water must be added to 40 liters of a 30% alcohol solution to make a 20% alcohol solution?
I have tried X+40(.3)=.2(40+X) but i keep getting it wrong.
Click here to see answer by josmiceli(19441)

Question 725449: Proportions: Mr. Freidmans new car has a cooling system that requires 16 quarts of coolant. The cooling system needs 1 quart pf antifreeze for every 2 quarts of water to protect against winter freeze up. How much water should be drained from the cooling system and replaced with antifreeze to protect against freeze up?
Click here to see answer by KMST(5328)

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