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Question 8101: bill invested $30,000 in two seperate accounts paying 3% and 4.1% annual simple interest. if bill earned a total of of $1091.73 from the two investments, how much was invested in each account.
I have no clue how to come up with the equation of this problem. The instructions say to find the equation for this investments problem andsolve it.
Click here to see answer by srinivas123(23)

Question 8146: Use 8 9s to reach a sum of 1125. My daughter has struggled with this for hours. SO HAVE I. Please help quick
Click here to see answer by longjonsilver(2297)

Question 8175: a mississippi riverboat can travel 75 kilometers downstream in three hours and can make the return trip in five hours. find the speed of the boat in still water.
Click here to see answer by longjonsilver(2297)

Question 8422: I have no idea how to solve this problem
The cooling system on a truck contains 5 gallons of coolant that is 40% antifreeze. How much must be withdrawn and replaced with %100 antifreeze to bring the mixture to 50% antifreeze?
Click here to see answer by drglass(89)

Question 8504: how many gallons of salt must be added to 40 gallons of a 20% salt sollution in order to get a 30% sollution
Click here to see answer by glabow(165)

Question 8643: a chemist has one solution that is 60% chlorinated and another that is 40% chlorinated. How much of each solution is needed to make a 100 L solution that is 50% chlorine?

Click here to see answer by rapaljer(4671)

Question 8906: use definitions or identites to find the exact value of the remaining 5 trig functions.
1. sin=(sqrt3)/4
2. cot=1/2
3. csc=5
4. sec = 5/3
5. cot=2
Thank you so much!!
Click here to see answer by Abbey(339)

Question 9442: a test solution of gasohol contains 60L of gasoline and 15L of alcohol. How much pure alcohol must be added so that the resulting solution is 25% alcohol?
Click here to see answer by rapaljer(4671)

Question 9829: A man weights 5/6 of his weight plus 30 pounds. How much does he weight?
Click here to see answer by huntingmaster325(15)

Question 9859: What would a written expression to represent the perimeter of a rectangle be?

2x-7 for the width
3x center
x heigth
Click here to see answer by CharStar(110)

Question 10267: Heavy cream, which is 30% butterfat, and lowfat milk, which is 2% butterfat, are added together to make 100 gallons of regular milk, which is 4% butterfat. How much of cream and low fat milk should be used?
This is what I have set up (i don't know if it's right...):
.30x + .02y = .04(100)
Click here to see answer by rapaljer(4671)

Question 10331: How much water should be added to 20 ounces of a 15% solution of alcohol to dilute it to a 10% solution?
Click here to see answer by Earlsdon(6294)

Question 10552: Are there key factors to observe when solving word problems?
Click here to see answer by rapaljer(4671)

Question 10597: I believe this is a slope intercept type of word problem.
A small business predicts its revenue growth by a straight-line method with a slope of $50,000 per year. In its fifth year, it had revenues of $330,000. Find an equation that describes the relationship between revenues, R, and the number of years, T, since it opened for business.
How do I set this up? What answer did you get?
Click here to see answer by mathmaven53(29)

Question 10912: This word problem has me stumped. Can you help?
How much water must be evaporated from 240 gallons of a 3% salt solution to
produce a 5% salt solution?
Click here to see answer by rapaljer(4671)

Question 11146: A snack food is made by mixing 5 lb of popcorn that costs $.80 per pound with caramel that costs $2.40 per pound. How much caramel is needed to make a mixture that costs $1.40 per pound?
Click here to see answer by Earlsdon(6294)

Question 11338: How many pounds of candy selling for $5.80 per pound should be mixed with 7 punds of candy selling for $2.40 per pund to obtain a mixture for $3.42 per pound?
Click here to see answer by longjonsilver(2297)

Question 11326: How many pounds of candy selling for $5.80 per pound should be mixed with 7 pounds of candy selling for $2.40 per pound to obtain a mixture selling for $3.42 per pound?
Click here to see answer by longjonsilver(2297)

Question 11749: I am truly stumped with this one.
An alloy weighing 20 kg is 30% copper. How many kg of another alloy, which is 80% copper, must be added in order to produce an alloy which is to be 50% copper?

Click here to see answer by Earlsdon(6294)

Question 11889: Pleased help me sir....
How many grams of an alloy containing 35% nickel must be melted with an alloy containing 65% nickel in order to obtain 20 grams of an alloy containing 41% nickel?
Click here to see answer by Earlsdon(6294)

Question 12332: A 100% concentrate is to be mixed with having a concentration of 40% to obtain 55 gallons of a mixture with a concentration of 75%. How much of the 100% concentrate will be needed?
Click here to see answer by longjonsilver(2297)

Question 12349: A consumer goods manufacturer wanted to blend two grades of coffee, one costing $1.50 per kg., the other 200 kg. costing $1.90 per kg., to be sold off at $1.60 per kg. How much coffee costing $1.50 per kg. would be needed?
This is a new lesson. Please help solve this problem.
Click here to see answer by kusha(21)

Question 12470: how much water must be evaporated from 32 ounces of a 4% salt solution to produce a 6% salt solution?
Click here to see answer by Earlsdon(6294)

Question 12568: This is the question: A chemist wants to mix 46% and 56% alcohol solutions to make 40 liters of 47% alcohol solution. How many liters of 46% alcohol solution is necessary?(Please Help)
Click here to see answer by Earlsdon(6294)

Question 12601: How many gallons of pure antifreeze must be added to 20 gallons of 25% antifreeze to get a mixture that is 40% antifreeze
Click here to see answer by rapaljer(4671)

Question 13280: How many kilos are in a ton?
Click here to see answer by rapaljer(4671)

Question 13262: How much water should be added to 1 gallon of pure antifreeze to obtain a solution that is 60% antifreeze?
Click here to see answer by rapaljer(4671)

Question 13411: Could you please help me with this problem? It looks like Greek to me.
The numberof parts per million of nitric oxide emissions y from a certain car engine is approximated by the model y=-5.05x^3+3857x-38411.25 (13
Click here to see answer by rapaljer(4671)

Question 13737: how many metric tons of chromiun must be added to 2.50 metric tons of stainless steel to raise the percent chromium from 11% to 18%
Click here to see answer by longjonsilver(2297)

Question 13722: I've tried to understand this question but it doesn't seem as if they have given enough information....
If 1 quart of orange juice concentrate is added to 4 qt of a solution that is 20% concentrate in water, what is the percent of concentrate in the new solution?
Click here to see answer by longjonsilver(2297)

Question 13714: What is the strength of a salt solution that contains 12 gallons of salt and 18 gallons of pure water?
gal. salt gal water
12 18
Click here to see answer by longjonsilver(2297)

Question 10375: A box of pancake mix containing 2 1/4 pounds cost $2.79. What is the cost per pound?
Click here to see answer by LilSkittleMd(119)

Question 14323: okay here is the question...Ticket sales for the band concert totaled $1200. The adult tickets were $2 each. Student tickets were $1 each. There were twice as many adults tickets sold as student tickets. How many of each kind were sold?
i need to see how you got the answer
Click here to see answer by LilSkittleMd(119)

Question 14307: How many liters of a 10% alcohol solution must be added to 80 liters of a 30% alcohol solution to obtain a 15% alcohol solution? Please Help!!!
Click here to see answer by Earlsdon(6294)

Question 14427: The total cost of 8 gallons of regular unleaded gasoline and 12 gallons of premium unleaded is $27.84. premium unleaded gasoline costs $0.17 more per gallon than regular unleaded. Find the price per gallon for each grade of gasoline. Please show how to set this equation up and answer it.
Click here to see answer by LilSkittleMd(119)

Question 14581: if a piece of equipment is making 1 complete revolution every 15 seconds what is the rpm? (revolution per minute)?
Click here to see answer by Alwayscheerful(414)

Question 14583: knowing 1,000 grams = 1 kilo. you are feeding a material to a piece of equipment at the rate of 200 grams every 30 seconds.how many kgs.(kilos) per hour are you feeding?
Click here to see answer by Alwayscheerful(414)

Question 14619: I need help with this problem. Premium coffee sells for $6.00 per pound and regular coffee sells for $4.00 per pound. How many pounds of each type of coffee should be blended to obtain 100 pounds of a blend that sells for $4.64 per pound.
Heres what I was doing but I am getting confused.
6(100) + 4x = 4.64(100-x)
600 + 4x =4.64 - 4.64x
8.64x= -136
I think I have messed up somewhere.
Click here to see answer by Earlsdon(6294)

Question 15270: Bob has twice as much money as Anthony.
Anthony has $7 more than Lisa.
Together they have $73.
How much does each have?

Click here to see answer by rapaljer(4671)

Question 15294: If a plumber charges $110 for 3 hours and $160 for 5 hours. In keeping this rate how much will he charge for 8 hours?
Click here to see answer by rapaljer(4671)

Question 15293: How many liters of antifreeze must be added to 5 liters of water to make no less than a 60% solution and no more than an 80% solution?
Click here to see answer by rapaljer(4671)

Question 15639: This problem has me stumped bcause I have 8 ounces already mixed and need to add to it to get 12 ounces. If I was just adding enough chocolate syrup to make it 42 percent, I would not be so confused. Here is the problem:
I want to make the perfect 12 ounce cup of chocolate milk. It requires that the mixture is 42% chocolate syrup. What I have right now is 8 ounces of milk/syrup mixture that I know contains 30% syrup. What must the syrup concentration be in the remaining mixture that I must add in order to achieve perfection?
Click here to see answer by Earlsdon(6294)

Question 15837: 400 tickets were sold to a ballgame. Adult tickets were $2, Child tickets were $3. Tickets sold totaled $1050. How many of each ticket were sold.
Click here to see answer by kunal_122(19)

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