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Question 334342: The length of a rectangle is 9 feet less than twice its width. The perimeter is 54 feet. What are the width and length of the rectangle?
Click here to see answer by stanbon(75887)

Question 334338: It takes Jimmy 20 minutes to do the dishes. Susie can do the same work in 15 minutes. How long would it take them to do the dishes if they work together?
Click here to see answer by josmiceli(19441)

Question 334448: A recipe for brownies requires 2 2/3 cups of flour. There are 45 cups of flour in the bag. After as many whole recipes of brownies as possible have been made for the Spring Fling, how many cups of flour will be left over?
a 2/3 cup b 7/8 cup c 1 cup d 2 cups e 2 1/3 cups
Click here to see answer by josmiceli(19441)

Question 334722: A copper alloy that is 40% copper is to be combined with a copper alloy that is 80% copper to produce 120 kilograms of an alloy that is 70% copper. How many kilograms of each alloy must be used?
Click here to see answer by stanbon(75887)

Question 334878: in a chemistry class 5 liters of a 4% saline solution must be mixed with a 10% solution to get a 6% solution how many liters of the 10% solution are needed
Click here to see answer by stanbon(75887)

Question 334816: How many liters of a 40%-alcohol solution must be mixed with 10 liters of a solution that is 80% alcohol to get a solution that is 60% alcohol? I need to translate this problem into a pair of linear equations in two variables. Can anyone help?
Click here to see answer by Fombitz(32388)

Question 335050: Help would be greatly appreciated. Thank you.
A flask containing 300 ml of 90% nitrite solution tips over spilling part of its contents. This was subsequently replaced by an equal amount from a mixture of 30% nitrate. If an 80% solution resulted, how much was spilled?

Click here to see answer by nyc_function(2741)

Question 334017: 10 m3(The 3 is supposed to be small and high like in exponent. My computer isn't skilled.) of soil containing 40% sand was mixed in 8m3(Again with the 3, its like an exponent) of soil containing 58% sand. What is the sand content of the mixture?
The answer is 48% (I looked at the answer sheet! Shhh!), but I need to know how to solve it! And i have to show all of my work!
Help? Thank you so MUCH!!!
Click here to see answer by Fombitz(32388)

Question 335272: Alex received scores of 82 and 88 on his first two quizzes. What average score does he need on the next two quizzes to achieve a final average score of 90, if all four scores are weighted equally?
Click here to see answer by Fombitz(32388)

Question 335306: a certain alloy contails 75% copper and a second alloy 35% copper. how many kilograms of the second alloy must be added to 62 kilograms of the first to form an alloy that is 50% copper?
Click here to see answer by Fombitz(32388)

Question 335305: a druggist has 20 grams of a 10% solution of alchohal. how many grams of a 6% alchohal solution must be added to form an 8% alchohal solution?
Click here to see answer by Fombitz(32388)

Question 335317: A solution contains 5% bleach. How much pure bleach must be added to 25 liters to make the solution 8% bleach?
Click here to see answer by Fombitz(32388)

Question 335325: How many gallons of a 30% acid solution must be mixed with 50 gallons of a 70% acid solution to make a 55% solution?
Click here to see answer by checkley77(12844)

Question 335483: How many gallons of pure alcohol should be mixed with 20 gallons of a 15% alcohol solution to obtain a mixture that is 25% alcohol
Click here to see answer by mananth(16946)

Question 335595: In my problem a farmer needs 450lbs of chicken feed mixture that is at least 15% protein. The two feeds available are Feed A, which is 18% protein and Feed B, which is 10% protein. Rounded to the nearest pound, how many pounds of each type of feed should he order if he wants 450lbs of a mix that is 15%protein?
Click here to see answer by Fombitz(32388)

Question 335622: write the algebraic phrase corresponding to the phrase: five times the sum of twice a number and -5
Click here to see answer by Fombitz(32388)

Question 335775: How many liters of a 60% alcohol solution must be mixed with 50 liters of a 90% solution to get a 70% solution?
Click here to see answer by stanbon(75887)

Question 335856: a 10% solution of fertilizer is to be mixed with a 50% solution of fertilizer in order to get 160 gallons of 40% solution. How many gallons of the 10% solution and the 50% solution should be mixed?
Click here to see answer by mananth(16946)

Question 336104: How many liters of water must be added to 8 liters of a 40% acid solution to obtain a 10% acid solution ?
Click here to see answer by stanbon(75887)

Question 336152: When making a telephone call using a calling card, a call lasting 6 minutes costs $2.90. A call lasting 16 minutes cost $6.90. Find a linear function that relates the cost, C, of a making a call length, X, of the call, treating length of the call as the independent variable.
Click here to see answer by stanbon(75887)

Question 336175: How many liters of a 30% alcohol solution must be mixed with 80 liters of a 80% solution to get a 50% solution?
I have made a table and tried to work many algebraic solutions but cannot come up with one.
Click here to see answer by stanbon(75887)

Question 336495: A hospital needs to dilute a 60% boric acid solution to a 10% solution. If it needs 40 liters of the 10% solution, how much of the 60% solution and how much water should it use?
Click here to see answer by edjones(8007)

Question 336568: A horticulturist wants to mix three types of fertilizers, which contain 20%, 30%, 40% nitrogen, respectively. If the final mixture should be 1000 pounds of 32% nitrogen , all three types are used, and there is twice as much of the 40% type as of the 20% type, how much is in the final mixture.
Click here to see answer by Jk22(389)

Question 336525: How many liters of a 10% alcohol solution must be mixed with 80 liters of a 80% solution to get a 50% solution?
Click here to see answer by Fombitz(32388)

Question 336525: How many liters of a 10% alcohol solution must be mixed with 80 liters of a 80% solution to get a 50% solution?
Click here to see answer by edjones(8007)

Question 336654: A meat market manager mixes hamburger having 30% fat content with hamburger that has 10% fat content in order to obtain 400 pounds of hamburger with 25% fat content. How much hamburger of each type should the manager use?
Click here to see answer by nyc_function(2741)

Question 337054: How much 20% antifreeze solution must be added to 20 liters of 50% antifreeze solution to reduce it to 40% antifreeze?
Click here to see answer by mananth(16946)

Question 337048: A hospital needs to dilutea 60% boric acid solution to a 10% solution. If it needs 40 liters of the 10% solution, how much of the 60% solution and how much water should it use?
Click here to see answer by mananth(16946)

Question 337049: A hospital needs to dilute a 60% boric solution to a 10% solution. If it needs 40 liters of the 10% solution, how much of the 60% solution and how much water should it use?
Click here to see answer by Fombitz(32388)

Question 337071: British sterling silver is a copper-silver alloy that is 7.5% copper by weight. How many grams of pure copper and how many grams of British sterling silver should be used to prepare 200 grams of a copper-silver alloy that is 10% copper by weight?
Click here to see answer by ankor@dixie-net.com(22740)

Question 337439: How much water must be added to 20 liters of 50% antifreeze solution to reduce it to 40% antifreeze?
Click here to see answer by Fombitz(32388)

Question 337439: How much water must be added to 20 liters of 50% antifreeze solution to reduce it to 40% antifreeze?
Click here to see answer by nyc_function(2741)

Question 337442: How much 20% antifreeze solution must be added to 20 liters of 50% antifreeze solution to reduce it to 40% antifreeze?
Click here to see answer by nyc_function(2741)

Question 337533: how much water should be added to 24 mL of 17% alcohol solution to reduce the concentration to 12%?
Click here to see answer by Fombitz(32388)

Question 337534: how much water should be added to 12 mL of 17% alcohol solution to reduce the concentration to 6%?
Click here to see answer by mananth(16946)

Question 337715: One morning Martin drove 80 miles in 2 hours. After lunch, he covered 100 miles more in 3 hours. What was his average rate of spped in miles per hour, for the 5 hours driving?
Click here to see answer by Fombitz(32388)

Question 337901: Cashews sell for $5 per pund and peanuts sell for $2 per pound. How many pounds of each would you use to make 25 pounds of a mixture that sells for $92?
Click here to see answer by checkley77(12844)

Question 337983: How much water must be evaporated from 500 grams of a 10% salt solution
to obtain a 15% salt solution?
Click here to see answer by ankor@dixie-net.com(22740)

Question 337950: how many gallons of 35% saline solution must be mixed with 6 gallons of 50% saline solution to make 23% solution?
Click here to see answer by ankor@dixie-net.com(22740)

Question 338141: one solution is 20% acid and another is 12%. How many cubic centimeters of each solution should be mixed to obtain 100 cubic centimeters of a solution that is 15% acid.
Click here to see answer by checkley77(12844)

Question 338179: I have been working on this for some time. Thank you for your help. There is 300 g. of 20% hydrochloric acid solution. He needs to drain some off and replace it with an 80% solution so as to obtain a 25% solution. How many grams must he drain and replace with the 80% solution? Again I thank you in advance for you help
Click here to see answer by solver91311(24713)

Question 338381: The short leg of a triangle is 1 cm on a 30, 60, 90 triangle. What is the hypotenuse?
Click here to see answer by backback(24)

Question 338474: a spoonful of cream is taken from a pitcher of cream and put into a cup of coffee. the coffee is stirred. then a spoonful of this mixture is put into the pitcher of cream. is there now more cream in the coffee cup or more coffee in the pitcher of cream?
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