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Question 157315: Pure acid is to be added to a 10% acid solution to obtain 21L of a 40% acid solution. what amount of each should be used?
Click here to see answer by checkley77(7035)

Question 157671: cashews sell for $8 a pound, and peanuts sell for $3 a pound. A store want to make 20 pounds of mixed nuts which they will sell for $6 a pound. How many pounds of cashews and how many poiunds of peanuts should they use?
Click here to see answer by ptaylor(1578)

Question 157631This question is from textbook College Algebra
: Mixing water and antifreeze: How much water should be added to i gallon of pure antifreeze to obtain a solution that is 60% antifreeze?
I need help setting this problem up.This question is from textbook College Algebra

Click here to see answer by ptaylor(1578)

Question 157679: 320ml of 30% alcohol soln, convert this to 50% alcohol soln by adding 70% alcohol soln.
Click here to see answer by Fombitz(2113)

Question 157873: A company has a fruit mixture worth $6 per pound is mixed with nuts worth $11 per pound to get 50 pounds of a trail mixture worth $7.40 per pound. How much of each (fruits & nuts) was used to create this trail mix? Show the system of equations used to solve this. On this problem I know that the mixture is worth $7.40 per pound after mixing, and the 50 pounds of mixture is worth $370 total. I am just sure what to do from there.
Click here to see answer by jojo14344(1483)

Question 157973: Soybean meal is 12% protein, cornmeal is 6% protein. How many pounds of each should be mixed together in order to get a 240 lb mixture that is 9% protein?

Click here to see answer by nerdybill(2446)

Question 157977: The perimeter of a rectangle is 136m. The length is 8m more than twice the width. Find the dimensions?

Click here to see answer by checkley77(7035)

Question 157946: A pharmacist needs 70 liters of a 50% alcohol solution. She has availible a 30 % solution and an 80% solution. How many liters of each solution should she mix to obtain 70 liters of a 50% alcohol solution ?

Also from a take home exam
Click here to see answer by checkley77(7035)

Question 158038: A painting canvas has a length 6 inches longer than its width. If the area is 112 in^2, what are the dimensions of the canvas?

Click here to see answer by midwood_trail(310)

Question 158188: I'm struggling on 2 algebra problems I have. If you could please help me I would greatly appreaciate it.
1) The sum of two numbers is 43. One number plus three times the other number is 65. What are the numbers?
x + x = 43
x + 3x = 65

2) The difference between two numbers is 55. Four times the smaller number plus five times the larger number is 176. What are the numbers?
z = smaller number
y = larger number
x - x = 55
4z + 5y = 76

Click here to see answer by Alan3354(6059)

Question 158201This question is from textbook Intermediate Algebra for College Students
: Painting Sales: Joseph DeGuizman, an artist, sells both large paintings and small paintings. He sells his small paintings for $60 and his large paintings for $180. At the end of the week he determined that the total amount he made selling 12 paintings was $1200. Determine the number of small and the number of large paintings that he sold.
---I know the answers, more importantly, I cant understand how to setup the equation(s) to get the answers.This question is from textbook Intermediate Algebra for College Students

Click here to see answer by checkley77(7035)

Question 158226: Rubbing alcohol is typically diluted with water to 70% strength. If you need 3.5 oz of 45% rubbing alcohol, how many ounces of 70% rubbing alcohol and how much water should you combine?
Click here to see answer by checkley77(7035)

Question 158343: A 40% antifreeze solution and a 70% antifreeze solution is mixed to make 12 gallons of 50% antifrezze solution. How many gallons of each antifreeze solution should be used.
Click here to see answer by jojo14344(1483)

Question 158469: i am a prime number between 40 and 50. if you add one to me, the sum of the prime factors of that composite number 11. what number am i ??
Click here to see answer by MathLover1(1183)

Question 158467: I am a composite number between 20 and 30.The sum of my prime factors is the greastes of all the composites between 20 and 30.What number am i??
Click here to see answer by Edwin McCravy(2920)

Question 158528:
Click here to see answer by nerdybill(2446)

Question 158528:
Click here to see answer by ptaylor(1578)

Question 158646This question is from textbook
: How many ounces of water must be added to a 20 oz. of a 8% salt solution to make a 2% salt solution?This question is from textbook

Click here to see answer by ankor@dixie-net.com(6691)

Question 158688: how many gallons of a 20% acid solution must be mixed with 6 gallons of a 30% acid solution to make a 22% acid solution?
Click here to see answer by KnightOwlTutor(292)

Question 158793: 1)How many liters of pure acid must be added to 40 L of a 20% acid solution to make a solution which is 36% acid?
2)A laboratory technician has a solution that is 25% acid. He wishes to increase the concentration to 40% by adding pure acid. If he has 800 mL of solution to begin with, how much acid must be added to make the desired concentration?

Click here to see answer by checkley77(7035)

Question 158811: what is 2 numbers whose sum is 56 and the product is 783
Click here to see answer by checkley77(7035)

Question 158765: A food store a 10-lb mixture of peanuts, cashews, and raisins. Peanuts cost $1.50 per pound, cashews cost $1.00 per pound, and raisins cost $1.00 per pound. The mixture calls for twice as much peanuts than cashews. The total cost of the mixture is $12.00. How much of each ingredient did the store use?
Click here to see answer by ptaylor(1578)

Question 158772This question is from textbook Begining Algebra: Early Graphing
: A chemist needs to combine two solutions of a certain acid. How many liters of a 30% acid solution should be added to 40 liters of a 12% acid solution to obtain a final mixture that is 20% acid?This question is from textbook Begining Algebra: Early Graphing

Click here to see answer by ptaylor(1578)

Question 158857: How many gallons of a 80% antifreeze must be mixed with 70 gallons of 25% antifreeze to get a mixture of 70% antifreeze
Click here to see answer by nerdybill(2446)

Question 158866: To determine the number of deer in a game preserve, a conservationist catches 727 deer, tags them and lets them loose. Later 540 deer are caught, 180 of them are tagged. How many deer are in the preserve?
Click here to see answer by ranjithraghuram(4)

Question 158868: The speed of train A is 16 mph slower than the speed of train B. Train A travels 220 miles in the same time it takes train B to travel 300 miles. Find the speed of each train.
Click here to see answer by gonzo(654)

Question 158560This question is from textbook
: Mixture Problem. A store sells almonds for $6 per pound, cashews for $5 per pound, and peanuts for $2 per pound. One week the manager decides to prepare 100 16-ounce packages of nuts by mixing the peanuts, almonds, and cashews. Each package will be sold for $4. The mixture is to produce the same revenue as selling the nuts separately. Prepare a table that shows some of the possible ways the manager can prepare the mixture. This question is from textbook

Click here to see answer by ptaylor(1578)

Question 158994: Sean is buying a new DVD player and speakers for $315. The store offers him an interest-free payment plan that allows him to pay in monthly installments of $25.
How much will Sean still owe after one payment? After two payments? After three payments?
Click here to see answer by checkley77(7035)

Question 158985: A chemist has two solutions of sulfuric acid. The first is one half sulfuric acid and half water. The second is three-fourths sulfuric acid and one fourths water. He wishes to make 10 liters of a solution which is two-thirds sulfuric acid and one-thirds water. How many liters of each available solution should he use?
Click here to see answer by ankor@dixie-net.com(6691)

Question 159006: Hoe many pounds of hamburger that costs 1.60 per pound must be mixed with 70 pounds of hamburger that costs 2.10 per pound to make a mixture that costs 1.70 per pound.
Click here to see answer by midwood_trail(310)

Question 159016: forty-five ounces of pure grapefruit juice are added to 30 oz of a fruit punch that is 15% grapefruit juice. what is the percent concentration of grapefruit juice in the resulting mixture
Click here to see answer by nerdybill(2446)

Question 159056: a flask that weighs 345.8 g is filled with 225 mL of carbon tetrachloride (a liquid solvent). the weight of the flask and the carbon tetrachloride is found to be 703.55 g. from this information, calculate the density of carbon tetrachloride in g/mL
Click here to see answer by jojo14344(1483)

Question 159080This question is from textbook Intermediate Algebra
: The cooling system of a car has a capacity of 15 liters. If the system currently has a mixture of 40% antifreeze how much of this mixture should be drained and replaced with pure antifreeze so that the system is filled with 50% antifreeze?
I think that the answer is 1.5 liters. I just don't know how to get it in an Algebraic expression. I used the equation 15(.5)=15(.4)+ a
Let a=the amount of antifreeze to be added. In case you couldn't tell I am severely confused.

0
This question is from textbook Intermediate Algebra

Click here to see answer by jojo14344(1483)

Question 159093: Tim and Judy mix two kinds of feed for pedigreed dogs. They wish to make 54 pounds of feed worth $.28 per pound by mixing one kind worth $.24 per pound with another worth $.42 per pound. How many pounds of the cheaper kind should they use in the mix?
Click here to see answer by midwood_trail(310)

Question 159103: a contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 11% cement should he mix with 10 bags of 12.5% cement to produce a mix containing 12% cement?

Click here to see answer by checkley77(7035)

Question 159214This question is from textbook

: Soybean meal is 14% protein, cornmeal is 7% protein. How many pounds of each should be mixed together to get a 280 pound mixture that is 12% protein?This question is from textbook

Click here to see answer by ptaylor(1578)

Question 159215: A restaurant has some pancake batter that is too thin. It weighs 12 kilograms and contains 85% flour. How many kilograms of flour should be added so that the final mixture is 90% flour?
Click here to see answer by gonzo(654)

Question 159330: how much pure acid should be mixed with 8 gallons of 50% acid solution to get an 80% solution?
Click here to see answer by nerdybill(2446)

Question 159329: a chemist needs 5 liters of a 50% salt solution. All he has available is a 20% salt solution and a 70% salt solution. How many liters of each of the two solutions should he mix to obtain his desired solutions?
Click here to see answer by ankor@dixie-net.com(6691)

Question 159357: A mixture containing 6% boric acid is to be mixed with 4 liters of a mixture which is 25% boric acid in order to obtain a solution which is 12% boric acid. How much of the 6% solution must be used?
Click here to see answer by stanbon(26252)

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