Questions on Word Problems: Mixtures answered by real tutors!

Tutors Answer Your Questions about Mixture Word Problems (FREE)

Question 595095: Write the equation of a line that passes through the 2 points (3,4) and (1,-2)
3,4 2/6= m=1/3 y-4=1/3(x-3)
1,-2 y-4=1/3x-1
+4 +4

y=1/3x+3 Is this the correct answer???
Click here to see answer by mananth(12270)

Question 595412: A steel band circles the earth at the equator. It is assumed that the steel does not stretch or shrink and that the earth is a perfect sphere. If the band were lengthened so that it is 6" above the equator at all points around the earth, what length must be added to the band?
Click here to see answer by ankor@dixie-net.com(15624)

Question 595687: a laboratory assistant wants to make 15 liters of 60% acid solution. if solution of 20% and 35% are availble in the laboratory. how many liters of each must be mixed tp prepare the solution?
Click here to see answer by Alan3354(30959)

Question 595791: what is the better deal:16 inch diameter pizza for $14 or 8inch diameter pizza for $6

Click here to see answer by stanbon(57219)

Question 596127: A hair salon charges a fixed rate of $25.00 for a haircut and then an additional $15 for any other services. Write a function to model the cost of services there and then determine how many services you had if you were charged $115
Click here to see answer by nerdybill(6948)

Question 596275: I have 525 gallons of milk. How many 20 gallon containers can I fully fill?"
Click here to see answer by jim_thompson5910(28476)

Question 596339: A chemist would like to dilute a 20-cc solution that is 5% acid to one that is 3% acid. How much water must be added to accomplish this task?
Click here to see answer by nerdybill(6948)

Question 593923: Four equal amount of belladonna exact containing 1.15%. 1.3%, 1.35% and 1.2% alkaloid, were mixed. What was the percentage strength of the mixture?

Click here to see answer by Hung(2)

Question 591308: You have on hand 800g of 5% coal tar ointment and 1200g of 10% coal tar ointment?
How many grams of coal tar should be added to the product to obtain an ointment containing 15% coal tar? The right answer 16.5g. But I cannot solve it. I know 100% is mixed.
Click here to see answer by Alan3354(30959)

Question 596494: If Steven can mix 20 drinks in 5 minutes, Sue can mix 20 drinks in 10 minutes, and Jack can mix 20 drinks in 15 minutes, how much time will it take all 3 of them working together to mix the 20 drinks? Please show formula. thank you!
Click here to see answer by stanbon(57219)

Question 596598: I need to fill unit orders between 1 and 1000 pieces of candy. I only have 10 different bag sizes. How many pieces should be in each bag to fill any quantity ordered between 1 and 1000 without using two of any size?
Click here to see answer by richard1234(5390)

Question 597008: A chef is using a mixture of two brands of Italian dressing. The first brand contains 9% vinegar, and the second brand contains 14% vinegar. The chef wants to make 270 milliliters of a dressing that is 12% vinegar. How much of each brand should she use?

Click here to see answer by lwsshak3(6461)

Question 597101: A student in a chemistry laboratory has access to two acid solutions. The first solution is 12% acid and the second is 30% acid, by volume. How many milliliters (ml) of each should she mix together to obtain 360 ml of a 25% acid solution?

thanks so much for your help!
Click here to see answer by richwmiller(9135)

Question 597184: A radioactive substance is known to decay according to the continuous expo-nential model Q(t) = Q0e^rt. The rate of change, , for the particular substance is -0.128, when
t is measured in years. What percentage (to the nearest :01%) of the original amount of the
substance is left after 5 years?
NOTE: Q(t) = Q0e^rt Q0 ITS Q AND THE ZERO IS IN THE BOTTOM LIKE IN LOG FORM
Click here to see answer by solver91311(16868)

Question 597191: The release of
fluorocarbons used in household sprays destroys ozone layer in
the upper atmosphere. Suppose the amount of ozone is given by P = Ce-.0025t, where t is
measured in years. How long will it take for 70% of the ozone to disappear? (Round to the
nearest yr.)
is it like c=100 and then i solve for t and P= 70%
Click here to see answer by stanbon(57219)

Question 597082: a certain metal is 40% tin. how many kilograms of this metal must be mixed with 80 kilograms of a metal that is 70% tin to get a metal that is 50% tin?
Click here to see answer by ankor@dixie-net.com(15624)

Question 597441: How much pure acid should be mixed with 6 gallons of a 20% acid solution in order to get a 90% acid solution?
Click here to see answer by edjones(7569)

Question 597457: A chemist needs to mix a 20% acid soultion with 9 liters of a 47% acid solution to obtain a new mixture that is a 29% acid solution. How many liters of a 20% acid soultion can be used?
Click here to see answer by richwmiller(9135)

Question 597360: Vegetable oil which costs $2.10/oz is made by combining soybean oil which costs $2.45/oz with canola oil which costs $1.40/oz. Find the number of oz of soybean oil and canola oil required to make 5.1 oz of vegetable oil.
Click here to see answer by math-vortex(472)

Question 597587: Anne and Nancy use a metal alloy that is 13.2% copper to make jewelry. How many ounces of a 12% alloy must be mixed with a 15% alloy to form 55 ounces of the desired alloy?
Click here to see answer by ankor@dixie-net.com(15624)

Question 597873: I have a problem on my homework that is .02(300)-x=15-.05x and the answer is supposed to be 180 but i keep getting -9. i don't understand how you get 180. my friends get -9 also. thank you for your help :)
Click here to see answer by Alan3354(30959)

Question 598292: A chemist made a mixture of 3 parts of copper and 5 parts of gold. He wants to change the mixture so that is 85% gold.
Click here to see answer by math-vortex(472)

Question 598654: How many liters of each of a 25% acid solution and a 85% acid solution must be used to to produce 70 liters of a 55% acid solution? ( round to two decimal places if necessary.)
Click here to see answer by stanbon(57219)

Question 598912: a worker needs to form 12 gallons of 70% ammonia solution to strip wax from some floors. He has one solution of 30% ammonia and another solution of 90% ammonia. How many gallons of the 90% solution should he use in the mixture?
Click here to see answer by stanbon(57219)

Question 599105: If I had to take a test with16 questions and I wanted to get 85% right how many questions would I have to get right?
Click here to see answer by flame8855(424)

Question 599402: A metal alloy weighing 2 mg and containing 45% gold is melted and mixed with 3 mg of a different alloy which contaians 30% gold. Which percent of the resulting alloy is gold.
Thanks!!!!
Click here to see answer by flame8855(424)

Question 599697: could I get help on a problem of systems of equations, what is the solution and how is it found? thank you
-3x+4y-3z=6
2x-3y+4z=-6
-6x+6y+5z=-6
Click here to see answer by lynnlo(4155)

Question 599684: I've got another one I'd like help with please.
A metallurgist has one alloy containing 21% aluminum and another containing 67% aluminum. How many pounds of each alloy must he use to make 57 pounds of a third alloy containing 23% aluminum? the answer should be rounded to the nearest hundredth. if this could be explained how to set it up with the answer, so hopefully I can help my step daughter with her remaining questions. Thank you
Click here to see answer by ankor@dixie-net.com(15624)

Question 599928: A pharmacist wishes to add pure water to 280 mL of 30%-saline solution to create a 28%-saline solution. How much water should he add

Click here to see answer by Nihal@SriLanka(21)

Question 600405: Shop A has 5 times as many machinists as Shop B, and Shop C has 3 times as many as Shop B. Shop A has how many times as many machinists as Shop C?
Click here to see answer by w_parminder(53)

Question 600388: how many grams of a 20% sulfuric acid solution must be mixed with 20 grams of a 35% sulfuric acid solution to make a 26% solution?
Click here to see answer by alicealc(281)

Question 600428: How much of an 85% solution of alcohol should be added to 5L of a 45% solution to produce a 60% solution?
Click here to see answer by alicealc(281)

Question 600396: How many ml of 1.5% solution must be mixed with a 25% solution to prepare 1000ml of 6.5% solution?
please show your work so that i can learn how to solve the problem on my ptcb test this is an example only
Click here to see answer by alicealc(281)

Question 600767: Marian drove for 5 hours at 45 miles per hour. How far did she drive
Click here to see answer by Alan3354(30959)

Question 600774: The Manager of a bulk foods establishment sells a trail mix for $8 per pound and premium cashews for $14 per pound. The manager wishes to make a 225-pound trail mix-cashew mixture that will sell for $11 per pound. how many pounds of each should be used?
Click here to see answer by josmiceli(9649)

Question 600808: How would you prepare a 20% Nacl solution, using 12 ounces of water. I need the weight of salt and how much water.
Click here to see answer by solver91311(16868)

Question 601202: The point (-23, 0) lies on the line -2x + 8y = 46. Determine if this point is a solution of the system
-2x + 8y = 46
x – 2y = -9
Click here to see answer by mananth(12270)

Question 601236: Pure copper was mixed with a 12% copper alloy to produce an alloy that was 32% copper. How much of the pure copper and how much 12% alloy were used to produce 44 Kg of 32% alloy?
Click here to see answer by mananth(12270)

Question 601238: Pure tin was mixed with an 8% tin alloy to produce an alloy that was 25% tin. How much pure tin and how much 8% alloy were used to produce 184 Kg of 25%alloy.
Click here to see answer by mananth(12270)

Question 601304: if amy baby-sat from 7:30 p.m. to 11:00 p.m. If amy was paid $15.75, how much did she earn per hour?
Click here to see answer by flame8855(424)

Question 601334: IN 20 gm ring here is 60 % gold and 40 % silver then how much gold is mixed such that gold in ring becomes 80 %
Click here to see answer by flame8855(424)

Question 601397: You are making 10 tons of concrete that is
59.3% cement by mixing a 39% cement mix-
ture with a 68% cement mixture.
a) How much of the 68% cement mixture
must you use?
Answer in units of tons

How much of the 39% cement mixturemust
you use?
Answer in units of tons
Click here to see answer by scott8148(6628)

Question 601524: please help me with this question
Explain the difference between finding the following two solutions:
What is 15% of 50?
50 is 15% of what?

Click here to see answer by rfer(12644)

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