Questions on Word Problems: Mixtures answered by real tutors!

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Question 838381: How much pure acid should be mixed with four gallons of a 40% acid solution in order to get a 70% acid solution?
Click here to see answer by ewatrrr(24785)

Question 838381: How much pure acid should be mixed with four gallons of a 40% acid solution in order to get a 70% acid solution?
Click here to see answer by lwsshak3(11628)

Question 838391: You need 765 mL of a 30% alcohol solution. On hand, you have a 85% alcohol mixture. How much of the 85% alcohol mixture and pure water will you need to obtain the desired solution?
Click here to see answer by ewatrrr(24785)

Question 838627: A solution comes from the manufacturer in pure form that must be diluted before use. Standard dilution is to 14%. How many mL each of concentrate and sterile water are needed to make 2 gallons?
Click here to see answer by josgarithmetic(39616)

Question 837923: Theophylline , an asthma medicine, is to be prepared from an elixir with a drug concentration of 5mg/mL and a cherry-flavored syrup that is to be added to hide the taste of the drug. How much of each must be used to prepare 100 milliliters of solution with a drug concentration of 2 mg/mL?
(a) elixer _________mL
(b) cherry-flavored syrup ________mL
Click here to see answer by KMST(5328)

Question 838678: I have a 300ml solution of 14% bleach but need to make it into 10% how much water do I add?
Click here to see answer by ewatrrr(24785)

Question 838678: I have a 300ml solution of 14% bleach but need to make it into 10% how much water do I add?
Click here to see answer by richwmiller(17219)

Question 838671: If we want 25 mL of 18% alcohol diluted from 70% alcohol, we must do two steps:
a) Solve this equation for x: 70% x = 18% (25 mL)
x is the amount (in mL) of 70% alcohol needed.
b) You want a total of 25 mL solution, so now subtract x from 25mL to determine the
amount of water needed.
Click here to see answer by ewatrrr(24785)

Question 838597: if our company made a hundred two bottles per minute how many more bottles do we have to make to make that go up 3 percent
Click here to see answer by ewatrrr(24785)

Question 838756: I need help wthi this question:
Albert invests money in three accounts that pay 4%, 10%, and 15%. He has two times as much money invested at 10% than he does at 15%. If the total amount he has invested is $4,950 and his interest for the year comes to $520, how much money does he have in each account?
I know how to do these problems when there are two variables, but not where there are three.
Click here to see answer by ewatrrr(24785)

Question 838757: I need help with this problem, I don't even know where to begin:
A chemist has three different acid solutions. The first acid solution contains 30% acid, the second contains 40%, and the third contains 60%. He wants to use all three solutions to obtain a mixture of 161 liters containing 50% acid, using twice as much of the 60% solution as the 40% solution. How many liters of each solution should be used?
Click here to see answer by richwmiller(17219)

Question 838840: saybean meal is 12% protien; cornmeal is 6% protein. how many pounds of each should be mixed together in order to get 240-lb mixture that is 9% protein?
Click here to see answer by josgarithmetic(39616)

Question 838875: How many ounces of pure apple juice must be added to 16 ounces of 25% apple juice to make a 40 % apple juice drink?
Click here to see answer by josgarithmetic(39616)

Question 838875: How many ounces of pure apple juice must be added to 16 ounces of 25% apple juice to make a 40 % apple juice drink?
Click here to see answer by josmiceli(19441)

Question 838906: How much water must be added to a 80% acid solution to make a mixture of 50L which is 70% acid?
Click here to see answer by josgarithmetic(39616)

Question 838907: How much pure acid must be added to a 30% acid solution to make a 60L solution which is 50% acid?
Click here to see answer by josgarithmetic(39616)

Question 839126: An alloy is made by mixing 40.0 grams of tin, 53.9 grams of lead, and 50.0 grams of copper. What is the percentage of lead in this alloy?

Click here to see answer by Alan3354(69443)

Question 839150: two kinds of orange juice one with 20% and the other with 5%, How can a mixture be make 15L with 9% orange juice?
Click here to see answer by josgarithmetic(39616)

Question 839154: In a rec year, companies spent a total of $86.9 Billion on Newspaper, television and radio ads. The total amount spent on Tv and Radio ads was only $2.7 Billion more than the amount spent on newspaper ads alone. The amount spent on newspaper ads was $5.5 Billions more than what was spent on Tv ads. How much was spent on each form of advertising ? please help I am so lost on this one
Click here to see answer by josmiceli(19441)

Question 839179: A jeweler has 3 rings, each weighing 18 g, made of an alloy of 7% silver and 93% gold. She decides to melt down the rings and add enough silver to reduce the gold content to 81%. How much silver should she add?
Click here to see answer by josmiceli(19441)

Question 839264: Hi, I am struggling with an application problem that has to deal with mixtures.
To make a flour mixture, a miller combined soybeans that cost $8.50 per bushel with wheat that cost $4.50 per bushel. How many bushels of each were used to make a mixture of 800 bushels costing $5.50 per bushel?
Click here to see answer by josmiceli(19441)

Question 839482: Solution X is 15% salt and the rest is water. Solution Y is 8% salt and the rest is water. How many liters of solution X need to be added to 5 liters of solution Y to make a solution that is 10% salt?
Click here to see answer by josgarithmetic(39616)

Question 839566: Candy A, costing $10 per pound, and candy B, costing $5 per pound, are used to make a mixture. If the mixture costs $6.50 per pound, how many points of candy A are needed to make 100 pounds of the mixture?
Click here to see answer by josgarithmetic(39616)

Question 839799: How many ml each of a 15% acetic acid solution and a 30% acetic acid solution must be mixed to obtain 600ml of a 22% acetic acid solution?
Click here to see answer by stanbon(75887)

Question 839918: A silversmith mixed 15g of an 80% silver alloy with 50g of a silver alloy of 25%. What is the percent concentration of resulting alloy?
Click here to see answer by stanbon(75887)

Question 839977: A 20 ounce bag of trial mis is 5% raisins. How many ounces pf a mixture that is 10% raisins must be added to make a mixture that is 6% raisins?
Click here to see answer by josgarithmetic(39616)

Question 839938: a chemist has 31/40 fluid oz. of solution and she needs 3/8 fluid oz. of solution how much will remain?
Click here to see answer by rfer(16322)

Question 840101: The sum of three natural numbers is 15. The second number is 1 more than the first number. The sum of the first and third numbers is equal to twice the second number. Find all three numbers.
Click here to see answer by richwmiller(17219)

Question 840148: A carpenter purchased 70 ft of redwood and 90 ft of pine for a total cost of $325. A second purchase, at the same prices, included 100 ft of redwood and 50 ft of pine for a total cost of $370. Find the cost per foot of redwood and of pine. What is the price per foot of each?
Click here to see answer by richwmiller(17219)

Question 840151: A company manufactures both mountain bikes and trail bikes. The cost of materials for a mountain bike is $80, and the cost of materials for a trail bike is $40. The cost of labor to manufacture a mountain bike is $90, and the cost of labor to manufacture a trail bike is $50. During a week in which the company has budgeted $1,800 for materials and $2,100 for labor, how many mountain bikes does the company plan to manufacture?

Click here to see answer by richwmiller(17219)

Question 839983: Which of the following is equivalent to 121 − x2 ?
Click here to see answer by Fombitz(32388)

Question 840105: How many pounds of peanuts selling for $4.25 per pound should be mixed with 10 pounds of cashews selling for $5.75 per pound to obtain a mix that sells for $5.25 per pound?
Click here to see answer by josgarithmetic(39616)

Question 840152: A contractor buys 14 yd of nylon carpet and 18 yd of wool carpet for $1648. A second purchase, at the same prices, includes 18 yd of nylon carpet and 23 yd of wool carpet for $2111. Find the cost per yard of the wool carpet.

Click here to see answer by ewatrrr(24785)

Question 840410: Having a lot of trouble with this problem any help is appreciated.
Carmen needs 30ml of 10% HCI solution, but she has only 5% HCI and 30% HCI solutions. How much of each solution should Carmen use to make the 30ml of 10% HCI solution?
Click here to see answer by Alan3354(69443)

Question 840424: a grocer has some coffee which is priced at $3 per pound and some which is priced at $5 per pound. To make a mixture of 100 pounds to be sold at $4 a pound, how many pounds of each kind must be mixed ?
Click here to see answer by josgarithmetic(39616)

Question 840440: A and B travel toward each other, A leaves at 8 am at the rate of 30 m.p.h. B leaves at 10 a.m at 40 m.p.h. The distance is 100 miles. How long will it be from the time B leaves until they meet ?
Click here to see answer by josgarithmetic(39616)

Question 840448: A 100% concentrate is to be mixed with a mixture having a concentration of 35% to obtain 60 gallons of a mixture with a concentration of 70%. How much of the 100% concentrate will be needed?
Click here to see answer by josgarithmetic(39616)

Question 840496: I went to a stream with 3 gallons. 40L, 50L and 100L. How
can I put exactly 70L of water in the 100L gallon without
pouring any water I ve put in the gallons back to the
stream.
Click here to see answer by richwmiller(17219)

Question 840649: My son had this question on a quiz. Two different teachers got different answers. I would like to know which answer is correct. The word problem is:
A chemist makes a mixture using 24 cups of powder and .8 gallons of liquid. What is the unit rate of powder to liquid?
Do I need to convert the gallon to cups? What is the unit RATE?
Click here to see answer by richwmiller(17219)

Question 840840: a butcher combined hamburger which costs $2.25 per pound with hamburger which costs $3.00 per pound. how many pounds of each were used to make 60 pound mixture to sell for $2.75 per pound?
Click here to see answer by josgarithmetic(39616)

Question 840843: two men A and B CAN PAINT A HOUSE IN 18 DAYS.THEY WORK TOGETHER IN 8 DAYS AND THEN B GOES AWAY AND A ALONE FINISHES THE WORK IN 15 DAYS.HOW LONG WOULD EACH OF THEM TAKE TO FINISH THE WORK SEPERATELY?SIR PLS GIVE ME ITS ALL STEPS(DIRECT AND INDIRECT VARIATION)
Click here to see answer by josgarithmetic(39616)

Question 840866: How many gallons of a 8% salt solution must be mixed with 75 gallons of a 12% solution to obtain a 10% solution?
Click here to see answer by josgarithmetic(39616)

Question 840907: A can do a piece of work in 3 days B can do it in 4 1l2 days.how long will they take to complete the work if they work together?sir pls give me its full steps?
Click here to see answer by hamsanash1981@gmail.com(151)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245