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Question 863134: Hi! I need help on this word problem
A chemist needs 12 liters of a 25% acid solution. The solution is to be mixed from three solutions whose concentrations are 10%, 20%, and 50%. How many liters of each solution will satisfy each condition?
(a) Use 4 liters of the 50% solution.
10% solution =___L
20% solution =___L
Click here to see answer by ankor@dixie-net.com(22740)

Question 863124: What will be the percentage of oil in the water of a final mixture if 23 gallons of a mixture of 20% oil and 80% water is combined with 15 gallons of a mixture of 10% oil and 90% water?
Click here to see answer by josgarithmetic(39618)

Question 863123: A breakfast cereal contains 4% of its weight in pecans. How many pounds of cereal containing only 2% pecans must be added to 50 pounds of the 4% cereal in order to reduce the resulting mixture percentage to 3%?
Click here to see answer by josgarithmetic(39618)

Question 863175: if 4 times the reciprocal of a number is 3 more than 5/2 times the reciprocal of that number. Find the number?
Click here to see answer by ankor@dixie-net.com(22740)

Question 863324: The perimeter of a rug is 24 feet. The lenght of the rug is 1 2/5 it's width. What is the area of the rug?

24*1 2/5=
Click here to see answer by ewatrrr(24785)

Question 863695: I have a 275 gallon container of 12% hydrofluoric acid. I need to know how many pounds of hydrofluoric acid are in the container. I have no clue how to calculate this.
Click here to see answer by josgarithmetic(39618)

Question 863767: What quantity of 80 per cent acid solution must be mixed with a 30 per cent solution to produce 1200 mL of a 50 per cent solution?
mL of acid solution =
I am not sure where to start, and how to figure this out.
Thank you
Marie
Click here to see answer by josgarithmetic(39618)

Question 863779: How many liters of a 25% solution must be added to 30 liters of an 80% solution to create a 50% solution?
Click here to see answer by ewatrrr(24785)

Question 863819: Jeremy's Graphics uses one cleanser that is 25% acid and a second that is 50% acid. How many liters of each must be mixed together to produce 10 liters that is 40% acid?
Click here to see answer by stanbon(75887)

Question 863917: A mechanic needs a radiator to have 30% antifreeze solution. The radiator currently is filled with 5 gallons of 25% antifreeze solution.
How much antifreeze mixture should be drained from the car if the mechanic replaces it with pure antifreeze.
Click here to see answer by josgarithmetic(39618)

Question 863979: You need a 95% alcohol solution. On hand, you have a 60 mL of a 25% alcohol mixture. How much pure alcohol will you need to add to obtain the desired solution?

Click here to see answer by mananth(16946)

Question 863985: if x mL test tube has 30% acid solution and y mL has 40% acid solution and they are poured into a third test tube, how much solution with the third test tube contain?
Click here to see answer by josgarithmetic(39618)

Question 864122: Nurse Levin added 50mL of dextrose to 1.8 liters of intravenous fluid. But the doctor said a 10% concentration of dextrose is needed. Find the amount of dextrose that the nurse should add.
I just cant figure this one out???????
Click here to see answer by josgarithmetic(39618)

Question 864178: How many ounces of a 15% alcohol solution and a 26% alcohol solution must be combined to obtain 33 ounces of a 19% solution?
Click here to see answer by lwsshak3(11628)

Question 864243: Suppose 8 pints of a 13% alcohol solution is mixed with 2 pints of a 60% alcohol solution. What is the concentration of alcohol in the new 10 pint mixture?
Click here to see answer by checkley79(3341)

Question 864196: How many ounces of a 20% alcohol solution and a 44% alcohol solution must be combined to obtain 51 ounces of a 28% solution?
Click here to see answer by checkley79(3341)

Question 864307: A rectangular photo of dimensions 8 cm by 9 cm is placed in a picture frame of uniform width on all sides. The resulting total area (picture and frame) is 210 square cm.
Click here to see answer by josgarithmetic(39618)

Question 864319: The length of a rectangle is 7 inches longer than it is wide. If the area is 228 square inches, what are the dimensions of the rectangle?
Click here to see answer by josgarithmetic(39618)

Question 864321: A missile fired straight up into the air has a height, in meters, given by h = -5 t^2 + 40 t, where t is the time, in seconds, the missile has been in the air.
By setting up and solving an equation, find the times when the missile reaches a height of 60 meters.
Click here to see answer by mananth(16946)

Question 864335: A firecracker is fired straight up into the air out of a window of a building. Its height, in feet, is given by h = -16 t^2 + 88 t + 230, where t is the time, in seconds, the fircracker has been in the air.
When does it reaches a height of 350 feet?
Click here to see answer by DrBeeee(684)

Question 864326: Find the total number of sets of positive integer solutions that satisfy the following linear inequalities
y1+y2+y3+y4+y5 smaller than or equal to 8.thsnk you.my email:jennylee594@hotmail.com. I will like to look for one paid tutor to help to solve sec maths whenever I need .tk
Click here to see answer by richard1234(7193)

Question 864139: a candy maker has two saltwater solutions. one solution is 12% saltwater and the other is 25% saltwater. how much of each solution does he need to make 20% saltwater
Click here to see answer by josgarithmetic(39618)

Question 864333: A firecracker is fired straight up into the air out of a window of a building. Its height, in feet, is given by h = -16 t^2 + 112 t + 304, where t is the time, in seconds, the fircracker has been in the air.
By setting up and solving an equation, find the time(s) when it reaches a height of 400 feet
Click here to see answer by lwsshak3(11628)

Question 864482: A firecracker is fired straight up into the air out of a window of a building. Its height, in meters, is given by h = -5 t^2 + 15 t + 100, where t is the time, in seconds, the fircracker has been in the air.
By setting up and solving an equation, find the time(s) when it reaches a height of 10 meters
Click here to see answer by LinnW(1048)

Question 864478: A fenced-in rectagular region with the dimensions 4 miles by 10 miles is suddenly expanded by the same distance in each dimension. The resulting region is now 72 square miles in size.
How much distance was added to each dimension? Set up and solve an equation to answer this question.

Click here to see answer by josgarithmetic(39618)

Question 864613: Can you please help me what is 4/5 of a pound of peanuts when each pound is $3.00
Click here to see answer by jim_thompson5910(35256)

Question 864613: Can you please help me what is 4/5 of a pound of peanuts when each pound is $3.00
Click here to see answer by stanbon(75887)

Question 864744: the U.S. house of representatives has 219 members. If a budget bill passes the House with 33 more members voting in favor than against, how many people voted for and how many people voted against? use substitution or elimination.
Click here to see answer by ewatrrr(24785)

Question 864746: This is a chapter over systems and matrices.. The section is over linear equations.
Here is the question
A store manager wishes to make a 100 pounds of nut mixture he can sell for $4.90 per pound. He must mix together peanuts at $3.00 per pound,cashews at $5.00 per pound , and pecans at $8.00 per pound. The pounds of peanuts must equal the amount of cashews and pecans combined. Find the amount of each type of nut required. Show all work, use algebra not matrices
Hope you can help!
Click here to see answer by richwmiller(17219)

Question 863906: A mechanic needs a radiator to have 30% antifreeze solution. The radiator currently is filled with 5 gallons of 25% antifreeze solution.
How much antifreeze mixture should be drained from the car if the mechanic replaces it with pure antifreeze.

Click here to see answer by josgarithmetic(39618)

Question 865041: How much stock solution of hydrogen peroxide 8% will you need to make 320ml of hydrogen peroxide 2% solution? ____
Click here to see answer by richwmiller(17219)

Question 864483: An alligator population in Florida's Cedar Grove State Park is given by A = 2 t^2 -5 t + 31, where A is alligator population in hundreds and t is in years since 2005. When were there 4300 alligators in the park?
Click here to see answer by richwmiller(17219)

Question 864481: A missile fired straight up into the air has a height, in meters, given by h = -5 t^2 + 40 t, where t is the time, in seconds, the missile has been in the air.
By setting up and solving an equation, find the time when the missile hits the ground.
Click here to see answer by richwmiller(17219)

Question 865059: You need a 15% solution. You are going to mix 10 liters of a 27% solution with an amount of a 10% solution. How much of the 10% solution should you use?
Click here to see answer by jim_thompson5910(35256)

Question 865195: A solution containing 12% alcohol is to be mixed with a solution containing 4% alcohol to make 20 gallons of solution containing 9% alcohol.How much of each solution should be used?
Click here to see answer by Alan3354(69443)

Question 865391: one antifreeze solution is 38% alcohol and another is 23% alcohol.How much of each mixture should be added to make 30 L of a solution that is 32% alcohol?
Click here to see answer by josgarithmetic(39618)

Question 865524: Here is the question exactly how it reads on the sheet.
Nurse Levin added 50 mL of dextrose to 1.8 liters if intravenous fluid. But the physician said a 10% concentration of dextrose is needed. Find the amount of dextrose that the nurse should add.
The answer given is 150mL but I cant seem to figure out how they got that answer. Please explain in detail if possible.
Thanks
Click here to see answer by richwmiller(17219)

Question 864334: An alligator population in Florida's Cedar Grove State Park is given by A = 2 t^2 - t + 16, where A is alligator population in hundreds and t is in years since 2000. When were there 4400 alligators in the park?
Click here to see answer by richwmiller(17219)

Question 863380: 50 mL of dextrose was added to 1.8 liters of fluid. How much more dextrose needs to be added if a 10% concentration is required?
Click here to see answer by richwmiller(17219)

Question 865580: I have 200 gallons of 89 proof alchol. How much h2o should I add to get it to 80 proof!
Click here to see answer by richwmiller(17219)

Question 865571: Nurse Levin added 50mL of dextrose to 1.8 liters of intravenous fluid but the doctor said a 10% concentration of dextrose is needed. Find the amount of dextrose that the nurse should add.
The answer listed is 150mL but I cant figure out how they got it.

Click here to see answer by richwmiller(17219)

Question 865688: Hi, I am having a hard time knowing how to set up and solve this word problem:
Working together, Dani and Cheri can reply to a day's worth of costumer-service emails in 4hr. Working alone, Dani takes 6 hr longer than Cheri. How long would it take Cheri alone to reply to the e-mails?
Thanks!
Click here to see answer by richwmiller(17219)

Question 865737: If 750 ml of a 6% solution is diluted to 2000 ml, the percentage of the final solution will be?
Click here to see answer by jim_thompson5910(35256)

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