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Question 813298: A farmer mixed gasoline and oil to have 2 gallons of mixture for his chain saw. The mixture was 32 parts gasoline to 1 part oil. How much gasoline must be added to bring the mixture to 40 parts gasoline and 1 part oil?
My attempt: .32 (2) + 1 (X) = .40 (2 + X)
.64 + X = .8 + .4X
X = .2666 gal of gas to be added
The author says it is .48 gal of gas to be added
Thanks,
Bob
P. S. I am not a student. I am 67 and just trying to keep my brain working.

Click here to see answer by ewatrrr(24785)

Question 813347: to makee 8 doughnuts it requires 4 cups of flour and 1/2 cup of milk how much milk and flour is needed to make 28 doughnuts
Click here to see answer by TimothyLamb(4379)

Question 813347: to makee 8 doughnuts it requires 4 cups of flour and 1/2 cup of milk how much milk and flour is needed to make 28 doughnuts
Click here to see answer by richwmiller(17219)

Question 813296: Calculate
The pH of a nitric acid which contains 12.2 g in 1.00 L of water.
Click here to see answer by josgarithmetic(39616)

Question 813502: You want 350 liters of a solution with 12% acid. You have two solutions, one is 16% and the other is 9%. How many liters of the 16% solution will be needed?
Click here to see answer by Alan3354(69443)

Question 813479: Solution A is 30% salt. Solution B is 10% salt. how much of each solution should be mixed to make 10 gallons of a 25% salt solution
Click here to see answer by Alan3354(69443)

Question 813420: Sketch the titration curve (volume versus pH) for the addition of 0.50 M NaOH to 20.0 mL of 0.20 M HCl.
Mark clearly the starting point and the half-equivalence point and the pH and calculate their values.

Click here to see answer by josgarithmetic(39616)

Question 813524: Their is a solution of 50 ml(parco-cleaner),we have to acidify this solution with 1:1 sulphuric acid.so how much amount of sulphuric acid added in this solution(i.e.parcocleaner)
Click here to see answer by josgarithmetic(39616)

Question 813526: A chemical storeroom has a 90% acid solution and a 40% acid solution. How many liters of the 90% solution should be added to 50 liters of the 40% solution to yield a 50% solution?
Click here to see answer by lwsshak3(11628)

Question 813807: in 10 liter milk 5% is water. how much by adding milk in it we will get 2% water
Click here to see answer by richwmiller(17219)

Question 813795: A patient receives an intravenous solution of a 5.0% (m/v) glucose solution.
How many liters of the glucose solution would the patient be given to obtain 80.g of glucose?
Click here to see answer by josgarithmetic(39616)

Question 813909: 2 numbers sum to 80.thrice the first is subtracted from the second is 4. find the numbers.
Click here to see answer by josgarithmetic(39616)

Question 814023: A chemist wishes to make 3 L of a 45% alcohol solution by mixing a 35% alcohol solution and a 60% alcohol . How much of each type should be used?
Click here to see answer by Alan3354(69443)

Question 814055: I need to create a solution of 40% ethanol and I have 1000ml of 80% ethanol. What is the volume of the second solution ?
Click here to see answer by richwmiller(17219)

Question 814298: how many ounces of a 22% alcohol solution and a 43% alcohol solution must be combined to obtain 33 ounces of a 29% solution

Click here to see answer by ewatrrr(24785)

Question 814327: one canned juice drink is 25% orange juice another is 10 %. How many liters of each should be mixed together in order to get 15 L that is 22% orange juice
Click here to see answer by josgarithmetic(39616)

Question 814336: What did you see when the two types of water were mixed?

Click here to see answer by solver91311(24713)

Question 814273: Mary needs 180 pounds of a 9 % nut mixture. She has a container of 33 % pecans and a container of 1 % cashews. How many pounds of cashews should she mix to get the 9% mixture?
Click here to see answer by josmiceli(19441)

Question 814478: two cups of flour are needed to bake half dozen cupcakes.how many cups of flour are needed for 45 cupcakes
Click here to see answer by rfer(16322)

Question 814538: x pounds of candy valued at $3.50 per pound is mixed with y pounds of candy valued at $4.30 per pound to produce 10 pounds of a mixture selling for $4 per pound. Find x and y, the number of pounds of each type. I've tried this several different ways and can't see to do it right. This is due tomorrow and I'm freaking out about what I'm doing wrong.
Click here to see answer by mananth(16946)

Question 814645: what if the classes bought 120 containers and had 30 more cans than bags how many bags and how many cans and bags did they buy?
Click here to see answer by LinnW(1048)

Question 814624: Hello,
My name is Traci and I am the mother of 7th grade pre-algebra student. She recently brought home a question and while I am usually able to help her with homework (after I re-learn how to do it myself), I am really stuck with this one. We have tried "acting it out with colored water," ratios, fractions and scouring the internet, but I am still at a loss to wrap my brain around this question so that I may adequately explain it to my daughter and lead her to discovery the solution on her own. Any help will be much appreciated!
Here goes:
I have one large pitcher containing 1 quart of lemonade and a second large pitcher containing 1 quart of iced tea. I pour 1 pint of lemonade into the iced tea pitcher and thoroughly mix it, and then pour 1 pint of the mixture back into the lemonade pitcher.
1. Is there more iced tea in the lemonade or more lemonade in the iced tea? Justify mathematically.
2. If the process is repeated a second time, how many ounces of lemonade will be in the original iced tea pitcher?
3. Is it possible to make both mixtures into 1/2 lemonade and 1/2 iced tea, using the same process repeatedly? Why or why not?
Thanks in advance for any help on this one!

Click here to see answer by ewatrrr(24785)

Question 814685: the sum of two numbers is 55 their difference is 7 what are the numbers ?
Click here to see answer by TimothyLamb(4379)

Question 814670: the sum of 2 numbers is 55.the difference is 7. what are the numbers?
Click here to see answer by TimothyLamb(4379)

Question 814694: find a number that is twice as far from 40 as it is from 73
Click here to see answer by LinnW(1048)

Question 814694: find a number that is twice as far from 40 as it is from 73
Click here to see answer by ewatrrr(24785)

Question 814669: Phoebe has 170 stamps in her collection her first book has 30 more stamps in it than her second book how many stamps are in each book
Click here to see answer by richwmiller(17219)

Question 814863: Sam's favorite recipe for fruit punch requires 12 % apple juice.How much pure apple juice should he add to 2 gallons of punch that already contains 8 % juice to meet his standards?
Click here to see answer by josgarithmetic(39616)

Question 814884: a seaplane flying with the wind flew from an ocean port to a lake,a distance of 240 mi in 2h.Flying against the wind,it made the trip from the lake to the ocean port in 3h.Find the rate of the plane in calm air and the rate of the wind.
Click here to see answer by TimothyLamb(4379)

Question 814882: A whale swimming against an ocean current traveled 60 mi in 2h.Swimming in the opposite direction,with the current,the whale was able to travel the same distance in 1.5 h.Find the speed of the whale in calm water and the rate of the ocean current.
Click here to see answer by TimothyLamb(4379)

Question 814880: Train A leaves the station traveling 20 m/h heading east.2 hours later train B leaves the same train traveling west at 35m/h.How long will it take for the two trains to be 205 miles away from each other?
Click here to see answer by mananth(16946)

Question 814955: Average Joe's Gymnasium charges a $50 sign-up fee and $65 per month. Globo Gym charges a $90 sign-up fee and $45 per month. For what number of months is the cost of the gyms equal?
65e + 50 = 45e +90
Click here to see answer by ewatrrr(24785)

Question 815024: Car A leaves home at 40 m/h.Four hours later car B leaves from a house that is 700 miles away headed towards car A at 50 m/h.How long will it take before the two cars meet?
Click here to see answer by TimothyLamb(4379)

Question 815056: How much water must be added to 4 liters of
a solution of water and tamic acid that is 7
percent acid to obtain a solution that is 5
percent acid

Click here to see answer by josgarithmetic(39616)

Question 815076: Alan's Coffee Shop makes a blend that is a mixture of two types of coffee. Type A coffee costs Alan $4.20 per pound, and type B coffee costs $5.30 per pound. This month, Alan made 156 pounds of the blend, for a total cost of 756.40 . How many pounds of type B coffee did he use?
Click here to see answer by josmiceli(19441)

Question 815143: A private Learjet 31A transporting passengers was flying with a tailwind and traveled 1120 mi in 2 h.Flying against the wind on the return trip,the jet was able to travel only 980mi in 2 h. Find the speed of the jet in calm air and the rate of the wind.
Click here to see answer by mananth(16946)

Question 815142: A motorboat traveling with the current went 35 mi in 3.5 h.Traveling against the current, the boat went 12 mi in 3h.Find the rate of the boat in calm water and the rate of the current.
Click here to see answer by mananth(16946)

Question 815190: How many gallons of distilled water must be added with 50 gallons of 30% alcohol solution to obtain a 25% solution ?
Click here to see answer by josgarithmetic(39616)

Question 815190: How many gallons of distilled water must be added with 50 gallons of 30% alcohol solution to obtain a 25% solution ?
Click here to see answer by josmiceli(19441)

Question 815140: Car A leaves traveling 66m/h traveling south.Two hours later,932 miles away,car B leaves traveling north on the same road at 34 m/h.How long will it take before the two cars meet?
Click here to see answer by josgarithmetic(39616)

Question 815232: how many liters of 40% silver must be added to 50 liters of 90% silver to make an alloy that is 60% silver
Click here to see answer by FightinBlueHens(27)

Question 815264: I want to find out how to solve this question:
"How many liters of a 10% solution of acid should mixed with 60% solution of acid to obtain a 20 liters of 50% solution?"
Do I need to use 2 variables? And will my set up of the equation be "x(.10)+y(.60)=20(.50)" ? or are there errors that must be corrected?
Click here to see answer by Alan3354(69443)

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