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Question 919352: In mixing a weed-killing chemical, a 40% solution of the chemical is mixed with a 75% solution to get 35 L of a 70% solution. How much of each solution is needed? How many liters of the 40% solution is needed in the mixture?
Click here to see answer by ewatrrr(24785)

Question 919443: How many ounces of 22% acid solution must be added to 10 ounces of 8% solution to obtain 12% solution?
Click here to see answer by richwmiller(17219)

Question 919546: How many ounces of pure water must be added to 80 ounces of a 35% salt solution to make a solution that is 14% salt
Click here to see answer by ankor@dixie-net.com(22740)

Question 919523: A chemist is using

342
milliliters of a solution of acid and water. If

16.1
%
of the solution is acid, how many milliliters of acid are there? Round your answer to the nearest tenth
Click here to see answer by KMST(5328)

Question 919722: The times t required to do a job varies inversely as the number of people P working. It takes 6 hours for 9 volunteers to pick up trash from 1 mile of roadway. How long would it take 10 volunteers to complete this job?
Click here to see answer by stanbon(75887)

Question 919742: How many liters of a 40% acid mixture and how many liters of a 10% acid mixture should be mixed to obtain 20 L of a 22% acid mixture?

Click here to see answer by Alan3354(69443)

Question 919720: The times t required to do a job inversely as the number of people P working. It takes 6 hours for 9 volunteers to pick up trash from 1 mile of roadway. How long would it take volunteers to complete this job?
Click here to see answer by josgarithmetic(39617)

Question 919931: Please help me solve this mixture word problem and show the steps to finding it. The answer is 12.5 quarts but I can't figure out how to get there:
A radiator contains 25 quarts of a water and antifreeze solution, of which 20% (by volume) is antifreeze. How much of this solution should be drained and replaced with pure antifreeze for the new solution to be 60% (by volume) antifreeze?
Click here to see answer by lwsshak3(11628)

Question 920023: A solution is 8% coolant. HOw much do i need to add to make it 4%. the capacity of the 8% is 1 gal.
Click here to see answer by ewatrrr(24785)

Question 920233: How much pure alcohol must be added to a 4L of a 10% alcohol solution that is 20% alcohol? Please show work not just the answer.
Click here to see answer by Alan3354(69443)

Question 920233: How much pure alcohol must be added to a 4L of a 10% alcohol solution that is 20% alcohol? Please show work not just the answer.
Click here to see answer by josmiceli(19441)

Question 920268: if I have 70 candies and 2 are mm,what percentage is this

Click here to see answer by jim_thompson5910(35256)

Question 920348: if ax+x^2=y^2-ay,what is a in terms of x and y? kindly help me....
Click here to see answer by MathLover1(20849)

Question 920349: if xy/x+y=1,what is x in terms of y?
Click here to see answer by MathLover1(20849)

Question 920314: a nurse is mixing a 3% saline solution and an 8% saline solution to get 2 liters of a 5% saline solution. how many liters of each solution must be combined
Click here to see answer by lwsshak3(11628)

Question 920438: if I have a 90% solution of ROH how do I make it a 70% solution ?
Click here to see answer by ewatrrr(24785)

Question 920536: If Michelle was twice her present age,she would be 8 years younger than her mother, who is 38. How old is michelle
Click here to see answer by ewatrrr(24785)

Question 920678: How many ounces of a 40% alcohol solution should be mixed with 58 oz of a 70% alcohol solution to produce a 60% alcohol solution?

Click here to see answer by josmiceli(19441)

Question 920687: Kevin made 12 gallons of milk containing 76% cream and 24% skim milk. Jason took out cream from the mix to make a new mixture that has 68% cream and 32% skim milk. How much cream did he take out? Solve using system of equations.
Click here to see answer by josgarithmetic(39617)

Question 920920:
Click here to see answer by lenny460(1073)

Question 920839: I have to buy 60 cupcakes with $3.00 dollars. At least one cupcake has to fall under prices of 2 cents, 5 cents, and 40 cents. How many cupcakes per price?
Click here to see answer by josmiceli(19441)

Question 921007: Brass is made from a mixture of copper and other elements. A mixture that is 80% copper is combined with a mixture that is 60% copper, resulting in 100 pounds of brass that is 65% copper.
Which equation can be used to find x, the amount of 60% mixture used to create the 65% mixture?

Click here to see answer by josgarithmetic(39617)

Question 921069: A stereo normally prices at $309is on sale for 40% off. Find the discount and the sale price.
Click here to see answer by rfer(16322)

Question 921065: A coffee company wants a new flavor of Cajun coffee. How many pounds of coffee worth $7 a pound should be added to 30 pounds of coffee worth $2 a pound to get a mixture worth $5 a pound
Click here to see answer by mananth(16946)

Question 921039: Ann and Mary mow lawns together. When Ann mows the lawn for Mr. Smith, it takes 100 minutes. When Mary and Ann mow the lawn for Mr. Smith together, they get the job done in 40 minutes. How long will it take Mary to mow the lawn for Mr. Smith alone?
Click here to see answer by ewatrrr(24785)

Question 921435: How to prepare 500ml of 50percent of ethanol from a bag of 90 percent of ethanol and water.
Click here to see answer by stanbon(75887)

Question 921447: 1. Find the area of an equilateral triangle if each side measures 12 cm.
A.24 cm^2
B.36 cm^2
C.24√3 cm^2
D.36√3 cm^2
E.40√2 cm^2
2. Find the area of an isosceles triangle if the measure of the congruent sides is 10 cm each and the altitude is 8 cm.
A.12 cm^2
B.24 cm^2
C.24 cm^2
D.48 cm^2
E.54 cm^2

Click here to see answer by KMST(5328)

Question 921464: How much water should be mixed to a 500 ml of 30% solution of alcohol to have a resulting concentration of 20%?
A.200 ml
B.250 ml
C.500 ml
D.1000 ml
E.2000 ml
Click here to see answer by Alan3354(69443)

Question 921473: Grapes sell for $4.24 per kilogram. How much do these grapes sell for per pound?
Click here to see answer by Alan3354(69443)

Question 921457: 1. A piece of rope was cut into 2 parts such that the lengths of the two are in the ratio 5:6. If one piece was longer by 110 m, how long was each piece?
A.L=30,W=40 m
B.L=90,W=100 m
C.L=80,W=90 m
D.L=70,W=80 m
E.L=50,W=60 m
2. Half of the class scored 90 in the test. One-third of the class scored 89. What is the average grade of the entire class?
A.88 1/2
B.88 5/6
C.88 2/3
D.88 4/5
E.88
Click here to see answer by KMST(5328)

Question 921722: How much pure antifreeze needs to be added to 15 gallons of 40% antifreeze solution to make a 50% solution
Click here to see answer by josmiceli(19441)

Question 921829: How much 30% alcohol, 45% alcohol, 60% alcohol and 95% alcohol could be mixed to make 20ml of 50% alcohol?
Who helps me
Click here to see answer by josmiceli(19441)

Question 921872: Fifteen ounces of pure silver are added to 60 oz of a silver alloy that is 25% silver. What is the percent concentration of the resulting alloy?
Click here to see answer by josmiceli(19441)

Question 921875: A long-distance runner started on a course at an average speed of 6 mph. Half an hour later, a second runner began the same course at an average speed of 8 mph. How long after the second runner starts will the second runner overtake the first runner?
Click here to see answer by josgarithmetic(39617)

Question 921840: A long-distance runner started on a course at an average speed of 6 mph. Half an hour later, a second runner began the same course at an average speed of 8 mph. How long after the second runner starts will the second runner overtake the first runner?
Click here to see answer by josgarithmetic(39617)

Question 921907: I really need your help in solving this problem. I appreciate your time and efforts. Have a terrific evening :) Here is the question?
A perfume is to be mixed in the ratio of 3 drops of pure essence to 7 drops of alcohol. How many drops of pure essence should be mixed with 5 drops of alcohol?
Click here to see answer by josgarithmetic(39617)

Question 921913: A nurse wants to add water to 26 ounces of a 10% solution of benzalkonium chloride to dilute it to an 8% solution. How much water must she add?
Click here to see answer by josgarithmetic(39617)

Question 921903: For his birthday party, Scott mixed together 7 liters of Brand A fruit punch and 3 liters of apple juice. If Brand A contains 10% fruit juice then what percent of the final mixture is fruit juice?

Click here to see answer by josgarithmetic(39617)

Question 921960: Use a system of linear equations to solve:

pure rice (100%) and a mixture that is 50% rice and 50% beans are mixed. how many cups of each are needed to get 20 cps of a mixture that is 70% rice and 30% beans?

The answer is 8 cups of rice and 12 mixture.
Click here to see answer by josgarithmetic(39617)

Question 922383: I need help writing an equation.
Here is the word problem.
how will you spend your average life expectancy?
You will devote 30 years working and doing house work. The number of hours you work will exceed the number of years doing house work by 20. Over your lifetime how many years will u spend on these activities...
Click here to see answer by ewatrrr(24785)

Question 922696: how many milliliters of pure water must be added to 60 milliliters of a 20 percent salt solution to make a 12percent salt solution?

Click here to see answer by lwsshak3(11628)

Question 922901: I require help with this question. -start- Ten liters of 40% acid solution is made by mixing a 20% and a 50% solution. How much of the 20% solution is required to get the specified concentration? -end-
Click here to see answer by ankor@dixie-net.com(22740)

Question 923041: A cran-apple juice blend is mixed in a ratio of cranberry to apple of 3 to 5
Click here to see answer by Alan3354(69443)

Question 923034: Yasmine bought 6 gallons of apple juice. After filling up 4 bottles of the same size with apple juice she had 0.3 gallon of apple juice left. whats the amount of juice in each bottle?
Click here to see answer by josgarithmetic(39617)

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