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Question 959419: A broze alloy is made of copper and tin. A company has 20 pounds of a bronze alloy that is 15% tin. A) write a rational equation to model the amount of pure copper that must be added to the 20 pounds to make an alloy that is 12% tin. Use x to represent the amount of pure copper that is added. B) solve your equation to find how many pounds of pure copper must be added to make an alloy that is 12% tin
Click here to see answer by lwsshak3(11628)

Question 959507: Suppose that a ball is projected upward from the top of the Mart Hotel in Dallas, Texas, which is 400 feet high. Its position s in feet above the ground is given by the equation 𝑠=−16𝑡2+45𝑡+400. where t is the number of seconds elapsed.
a. How long will it take for the ball to reach a height of 200 feet above the ground?
b. When will the ball hit the ground? State the answer in number of seconds after the ball was projected.
c. What is the highest point that the ball reaches before falling back to earth? At what time will it reach that point?
Click here to see answer by lwsshak3(11628)

Question 959543: Together, a mango and a pineapple weigh 1.25 pounds. A mango and an apple weigh 1.35 pounds
together, and the apple and pineapple weigh 1.9 pounds together. How much does each piece of fruit weigh?
Click here to see answer by josmiceli(19441)

Question 959658: if 5 items cost $2.50 how much did each cost
Click here to see answer by Fombitz(32388)

Question 960020: I tried and I really don't get how to do these types of problems I would appreciate if someone answers my question and shows me how to do it and thank you
Heidi sold 56 tickets to a play and collected $215.00 adult tickets cost $4.50 each and student tickets cost $3.50 each how many tickets of each kind did she sell?
Click here to see answer by macston(5194)

Question 960211: How many gallons of 18% alcohol solution and how many gallons of 32% alcohol solution should be mixed to get a total 100 gallons of 25% alcohol solution?
Click here to see answer by Alan3354(69443)

Question 960314: Find the equation of the quadratic function in standard form.
Vertex: (-4, -4) through: (-6, 8)
Click here to see answer by josgarithmetic(39617)

Question 960311: How many mL of pure alcohol are in a 200 mL glass of wine that is 12 percent alcohol by volume?
Click here to see answer by Fombitz(32388)

Question 960386: 1.5 litres of liquid will produce 40 bags of feed each containing 25kg. How many litres will produce 50kg of feed
Click here to see answer by josgarithmetic(39617)

Question 960380: how many litres of 1.5 liquid will go into 40 bags of feed
Click here to see answer by Alan3354(69443)

Question 960273: Sir, A chemist wants 900 ml of 65% solution by mixing 25%, 45% & 78% solutions.(Condition is - all the three solutions to be used).Kindly solve with formula.Thanking you.
Click here to see answer by ankor@dixie-net.com(22740)

Question 960749: An 8 cL saline solution is 20% salt. How much distilled water must you add to the saline solution in order to dilute it to a 15% saline solution?
My answer:
Volume % salt Total salt
Water X 0 0
20% 80ml 0.2 80 x 0.2 = 16
15% X + 80 0.15 0.15(x + 80) = 0.15x + 12
16 = 0.15x + 12 4 = 0.15x 0.15x = 4 x = 4/0.15 x = 26.67ml = 2.667cl

Click here to see answer by rothauserc(4718)

Question 960751: The radiator of a truck contains 12 gallons of water. We draw off 3 gallons and replace it by alcohol, then draw off 3 gallons of the mixture and replace it by alcohol,etc., until 8 drawings and replacement have been made. How much alcohol is in the final mixture?
Click here to see answer by josgarithmetic(39617)

Question 960801: A grocer blends two grades of tea which are worth 120� and 20� respectively. How much of each kind of tea must he use to make mixture of 50 kg which he can sell at 150�
Click here to see answer by macston(5194)

Question 960804:
A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 4% cement should he mix with 10 bags of 11.6% cement to produce a mix containing 8% cement?
Click here to see answer by Edwin McCravy(20055)

Question 960987: If a student wants to mix a 45% acid solution with a 70% acid solution to create a 20 liter 60% acid solution, how many liters of 45% acid should they use?
Click here to see answer by josmiceli(19441)

Question 960970: A store mixes
Brazilian coffee
worth
$12
per kilogram and
Turkish coffee
worth
$14
per kilogram. The mixture is to sell for
$13
per kilogram. Find how much of each should be used to make a
144-kilogram
mixture
Click here to see answer by Alan3354(69443)

Question 961040: a store mixes kenyan coffee worth $12 per kilogram and venezuelan coffee worth $14 per kilogram. the mixture is to sell for $13 per kilogram. find out how much of each should be used to make a 360 kilogram mixture
Click here to see answer by josgarithmetic(39617)

Question 961132: How many litres of pure alcohol must be added to 20 litres of a 50% alcohol concentration in order to raise it to a 60% alcohol concentration?
Click here to see answer by richwmiller(17219)

Question 961261: Can you please solve this problem and show me how to do it? Than you.
How many g of gold should a coin of 53% gold be if when combined with a 5 g pure gold necklace, it forms a metal that is 76% gold?
Click here to see answer by stanbon(75887)

Question 961237: What quantity of 30% acid solution must be mixed with 480 mL of 90% acid solution to produce 80% acid solution?
Click here to see answer by josgarithmetic(39617)

Question 961228: A company wants to increase the 10%peroxide content of its product by adding pure peroxide (100% peroxide) If x liters of pure peroxide are added to 500 liters of it;s 10% solution, the concentration,C, of the new mixture is given by
C= x+0.1(500)
__________
x+500
How many liters of pure peroxide should be added to produce a new product that is 28% peroxide
Click here to see answer by josgarithmetic(39617)

Question 961285: Hello, can you please answer it and show me step by step how to do it? Than you.
Fred mixed 9 ml of a salt solution with 12 ml of a 47% salt solution, to make a 41% salt solution. Find the percent salt concentration of the first solution.
Click here to see answer by stanbon(75887)

Question 961343: the total receipts from high school musical was $1274. Student tickets costs $2 each and adult tickets sold for $5 each. if they sold of 325 tickets that night, how many adult tickets were sold? many student tickets.
There were student tickets and adult tickets sold.

two cities are 16040 miles apart. a plane leaves one of them, traveling towards the other at an average speed of 410 miles per hour. At the same time a plane leaves the other, traveling towards the first, at an average speed of 410 miles per hour. How long will it take them to meet? the two meet in hours.
Click here to see answer by lwsshak3(11628)

Question 961443: How many liters of a 20% acid solution should be added to 10 liters of a 30% acid solution to obtain a 25% acid solution?
Click here to see answer by stanbon(75887)

Question 961453: 0. How many gallons of rocket fuel containing 80% liquid oxygen must be mixed with 250 gallons containing 40% liquid oxygen to produce a mixture containing 70% liquid oxygen?
Click here to see answer by addingup(3677)

Question 961475: Forty liters of a 60% salt solution are diluted to produce a 45% solution. How much must be drained and replaced with distilled water so that the resulting solution will contain only 45% salt?
Click here to see answer by josmiceli(19441)

Question 961537: Trish's veterinarian diagnosed her cat with feline acne. He is out of the 1% benzoyl peroxide needed to treat it. So he recommended that she buy the 5% benzoyl peroxide for human acne in the drug store and dilute it to 1%. How many teaspoons of water should Trish mix with 1 teaspoon of the 5% benzoyl peroxide to get 1% benzoyl peroxide?
Click here to see answer by stanbon(75887)

Question 961556: twelve gallons of regular unleaded gasoline plus 8 gallons of premium unleaded gasoline cost $50.86 . Premium unleaded gasoline costs $0.11 more per gallon than regular unleaded . Find the price per gallon for each grade of gasoline .
Click here to see answer by josgarithmetic(39617)

Question 961625: HOW MANY OUNCES OF A 40% ALCOHOL SOLUTION MUST BE MIXED WITH 18 OUNCES OF A 45% ALCOHOL SOLUTION TO MAKE A 43% ALCOHOL SOLUTION?
Click here to see answer by lwsshak3(11628)

Question 961657: An alloy is a mixture of metals. Suppose that a certain alloy is made by mixing 60 grams of an alloy that contains 18% copper with 100 grams of pure copper.
a). How many grams are in the resulting mixture? __grams.
b). What percentage of the resulting mixture is copper? ___%
Click here to see answer by josmiceli(19441)

Question 961548: You are offered two different sales jobs. The first company offers a straight commission of 6% of the sales. The second company offers a salary of $ 210 per week plus 1% of the sales. How much would you have to sell in a week in order for the straight commission offer to be at least as good?
Now for the first equation wouldn't it be y= 06x for sales and the salary is .01x+210
Click here to see answer by Fombitz(32388)

Question 961699: The sum of three times a number and 11 is 68. Find the number.
Click here to see answer by MathLover1(20849)

Question 961974: You have 0.35 liters of an acid solution whose acid concentration is 15%. How many liters of pure water should be added to lower the concentration to 7%?
Click here to see answer by lwsshak3(11628)

Question 962004: For tin it's $4.00 but how much pounds?
Click here to see answer by EdenWolf(517)

Question 962270: How much water be added to 30 litres of alcohol to make solution of 40% strength
Click here to see answer by Fombitz(32388)

Question 962220: calculate the amount of 70%, 60 %,40% and 30% alcohol should be mixed to give 50% alcohol?
Click here to see answer by Alan3354(69443)

Question 962221: calculate the amount of 70%, 60 %,40% and 30% alcohol should be mixed to give 50% alcohol?
Click here to see answer by Fombitz(32388)

Question 962368: Can you please sol e this problem and show me The steps, thank you.
Sara mixed 5 L of cranberry juice into 4 L of apple juice, that had 33% sugar. If the cranapple mixture was 40% sugar, what was the percent of sugar in the cranberry juice?
Click here to see answer by stanbon(75887)

Question 962372: Jessica needs 12lb of metal with 43% silver. If Jessica combines one metal with 12% silver, and another with 79% silver. How much of each metal does Jessica need?
Click here to see answer by stanbon(75887)

Question 962371: Can you please answer this problem thank you very much
Tim mixed 12 mL of an acidic solution with 8 mL of a 42% acidic solution, to make a 50% acidic solution. Find the percent acid concentration of the first solution.
Click here to see answer by ankor@dixie-net.com(22740)

Question 962369: Sandy has two bags of nuts; one with 79% peanuts, and the other with 11% peanuts. To make a 7 lb bag of 49% peanuts, how much of each should Sandy use?
Click here to see answer by josmiceli(19441)

Question 962370: Nancy's trail mix was made combining 14 lbs of peanuts that cost 6 $/lb, 10 lbs of raisins at $/lb, and 13 lbs of cashews at 4 $/lb. What was the cost per lb of the mixture?
Click here to see answer by checkley77(12844)

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