Questions on Word Problems: Mixtures answered by real tutors!

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Question 324838: A seedman has seeds worth 50 per pound mixed with seeds worth 80 per pound. If he wishes to make a mixture of 30 pounds to sell at 75 per pound, how many pounds of each should he use?
Click here to see answer by Fombitz(32388)

Question 325046: How many bags of 5% concrete should be mixed with 7 bags of 23% concrete to get a mix of 12% concrete?
Click here to see answer by nyc_function(2741)

Question 325039: a man orders 60 pounds of cashews and peanuts, if he orders 24 pounds less of cashews, how many pounds of peanuts was ordered?
Click here to see answer by rfer(16322)

Question 325044: a rental car place rents out cars. barney is charged $111 for 3 days and 300 miles, mary is charged $207 for 5 days and 600 miles. what do they charge per day and per mile?
Click here to see answer by checkley77(12844)

Question 325214: We have a 6% gallon jug of bleach and we want to make a 1% solution of bleach, how much water is needed to make this 1% batch? 1 gal. will make a 3% solution of bleach and we now have 2 gals so then if we added 2 more gals we would have a 1.5% solution with 4 gals, 3 of which were pure water added. Just looking for a good formula to get the right answer, came up with this but not sure if I am correct .06(1Gal) + 0(x)= .01(1+x) so .06 + 0= .01+.01x
Click here to see answer by stanbon(75887)

Question 325372: How much water must be added to one gallon of 8% saline solution to get a 2% saline solution?
Click here to see answer by stanbon(75887)

Question 325414: How many two-digit numbers can be written using digits from this set- 1,2,3,4,5,6,7.
Thanks for the help!
Click here to see answer by Alan3354(69443)

Question 325529: a passenger plane made a trip to las vegas and back,on the trip there it flew 432 mph and on the return it went 480 mph,how long did the trip there take if the return trip took nine hours?
Click here to see answer by mananth(16946)

Question 325684: 1st one is....
"A coin bank contains nickels,dimes and quarters totaling $5.45. If there are twice as many quarters as dimes, and 11 more nickels than quarters, how many of each coin are in the bank?"
2nd one:
"A vending machine contains 6 times as many quarters as dimes. If the total amount of money in the machine is $28.50, how many quarters are there?
and the last one:
"A solution of 63% is mixed with a solution of 43% to form 40 liters of a 53% solution. How much of the 63% solution must she use? (In liters)"
Thanks :)

Click here to see answer by mananth(16946)

Question 325750: A 40% antifreeze solution is to be mixed with a 70% solution to get 90 L of a 50% solution. How many liters of the 40% and 70% solutions will be needed?
I must solve this problem using a system of equations.
my first equation is x + y = 90, am I on the right track? what would the second equation be?
Click here to see answer by stanbon(75887)

Question 325726: How many gallons of a 20% ammonia solution should be mixed with 50 gallons of a 50% ammonia solution to make a 30% ammonia solution?
Click here to see answer by nerdybill(7384)

Question 326211: Can someone please step me through the following question? A radioactive material decays according to the formula A = A0(2)-t. How much of a 8 gram sample will be left in 6 year
Click here to see answer by stanbon(75887)

Question 326253: A merchant has coffee worth $60 a pound that she wishes to mix with 40 pounds of coffee worth $90 a pound to get a mixture that can be sold for $80 a pound. How many pounds of the $60 coffee should be used?
Click here to see answer by mananth(16946)

Question 326223: A radioactive material decays according to the formula A = A0(2)-t. How much of a 8 gram sample will be left in 6 years?
Click here to see answer by Fombitz(32388)

Question 326372: Vic can bind 200 booklets in 1 hr..Annie can do the same job in 50 minutes.How long will it take them to finish if Vic binds the first 50 booklets, then annie binds 30minutes,then Vic finishes th job? *Thank YOu *
Click here to see answer by mananth(16946)

Question 326407: You find that your watch gains 2 minutes in 6 hours. How much will it gain in 3 days?
Click here to see answer by Fombitz(32388)

Question 326406: If 3 pounds of apples cost $0.90, how many will 10 pounds cost?
Click here to see answer by Fombitz(32388)

Question 326419: How many mg of a metal containing 45% nickel must be combined with 6 mg of pure nickel to form an alloy 78% nickel?
Click here to see answer by Fombitz(32388)

Question 326496: How many ounces of water a chemical must be mixed with 10 ounces of sulfuric acid solution 20% to make it a 68% solution
Click here to see answer by Fombitz(32388)

Question 326503: How many ounces of water a chemist must mixed with 10 ounces of sulfuric acid solution 20% to make it a 68% solution?
Click here to see answer by Fombitz(32388)

Question 326556: The sum of two numbers is 4 less than twice the larger. If the larger is decreased by three times the smaller, the result is -20. Find the numbers.
Click here to see answer by user_dude2008(1862)

Question 326598: The areao of a picture projected on a wall varies directly as the sqaure of the disance from the projector to the wall.If a 10ft distance produces a 16ft squared picture, what is the area of a picture produced when the projection unit is moved to a distance 20ft from the wall?
Click here to see answer by alanc(27)

Question 326577: The larger of two numbers is 8 more than 4 times the smaller. If the larger is increased by four times the smaller, the result is 40. Find the numbers.
Click here to see answer by jvan(28)

Question 326722: How much quantity of 15% of acid solution must be added to 8L of 30% solution of the same acid to obtain 25% solution for duty cleaning?
Click here to see answer by mananth(16946)

Question 326725: 1.) Two helicopters set out simultaneously from heliport 384km apart and flew towards each other. One chopper flew 20kph faster than the other. if the end of an hour and 12minutes they passed across each other, find the speed of each.
2.) Two jet planes departed from the same airport at the same time in opposite flight course, one of the plane averages 500kph, the other is 600kph. How many hours later will they be 5,500kph?
Click here to see answer by galactus(183)

Question 326909: Mrs. Jones bought stock valued at $90 a share and sold it for $120. What was the percent of profit?
Click here to see answer by dcharlequin(6)

Question 326916: how much of an alloy that is 10% copper should be mixed with 300 ounces of alloy that is 60% copper in order to get an alloy that is 40% copper?
Click here to see answer by Fombitz(32388)

Question 327116: How much of an alloy that is 40% zinc should be added to 75 pounds of an alloy that is 65% zinc to get an alloy that is 50% zinc?
Click here to see answer by nyc_function(2741)

Question 327212: f(x)= -2/3x-5
for what value of f(x)= 5
Click here to see answer by Fombitz(32388)

Question 327218: How much of an 18% solution of sulfuric acid should be added to 360 mL of a 10% solution to obtain a 15% solution? Thank you for all your help.
Click here to see answer by Fombitz(32388)

Question 327202: factor if possible
2u^2 + 14u + 24
Click here to see answer by Fombitz(32388)

Question 327252: how many quarts of pure antifreeze must be added added to 9 quarts of a 40% antifreeze solution to obtain a 50% antifreeze solution
Click here to see answer by galactus(183)

Question 327330: Im studying for the fire department test and one of the questions in my practice book says How many ounces of water should be added to 24 ounces of an alcohol/water solution containing 44% alcohol to dilute the mixture to 20% alchohol. This doesn't fit the formula given and im really confused, and i was wondering if this problem has a different formula? Any help is greatly appreciated. Thank You!!!!
Click here to see answer by Fombitz(32388)

Question 327380: How much pure acid should be mixed with 2 gallons of a 30% acid solution in order to get 90% acid solution? round to two decimal places.
Click here to see answer by Fombitz(32388)

Question 327711: How much 20% acid solution and 80% acid solution should be combined to obtain 100 liters of 62% acid solution?
Click here to see answer by josmiceli(19441)

Question 327775: Mix a solution that is 30% alcohol with a solution that is 80% alcohol to make 800 mL of a solution that is 60 % alcohol. How much of each solution should you use?
Click here to see answer by checkley77(12844)

Question 327704: how many ounces of an alloy containing 30% gold on the world market must be mixed with an alloy containing 5% gold to obtain 25 ounces of an alloy containing 20% gold?
Click here to see answer by ankor@dixie-net.com(22740)

Question 328236: A druggist has an 18% solution of argyol. How much of this solution and how much water must be mixed together to make 10 liters of a 12% solution?
Click here to see answer by Fombitz(32388)

Question 328281: a cornmeal feed is 10% protein, and a feed supplement is 40% protein. how much of each must be combined to get 2400 pounds of feed that is 19% protein?
Click here to see answer by nyc_function(2741)

Question 328385: a long distance trucker travled 220 miles in one direction during a snow storm. The return trip in a rainy weather was accomplished at doubled the speed and took 5 hours less time. find the speed going.
Click here to see answer by Fombitz(32388)

Question 328403: 10cm^3 of a normal specimen of human blood contains 1.2 g of hemoglobin. How many grams does 16 cm^3 of the same blood cantain?
Click here to see answer by Fombitz(32388)

Question 328573: 4x^2-5y^2-16x-30y-9=0
Click here to see answer by Fombitz(32388)

Question 328754: how many gallons each of 25% alcohol and 35% alcohol should be mixed to get 10 gallons of 32% alcohol?
Click here to see answer by Fombitz(32388)

Question 328754: how many gallons each of 25% alcohol and 35% alcohol should be mixed to get 10 gallons of 32% alcohol?
Click here to see answer by stanbon(75887)

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