Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE) Get help from our free tutors ===> Algebra.Com stats: 2012 tutors, 419459 problems solved View all solved problems on Equations -- maybe yours has been solved already! Become a registered tutor (FREE) to answer students' questions. Click here to see problems AND answers on one page Question 213519: I need to know how to simplify 9-4r-7 Click here to see answer by rapaljer(4667)   Question 213590: A sugar free powdered drink mix sells for $2.99 per can. Each can of the mix contains 50.2g of powder, which, when added to water, will make 8 quarts of drink. What is the cost of the powdered drink mix in dollars/lb? (454g = 1lb) Click here to see answer by rfer(12657)   Question 213616: A whole chicken sells for $7.06 and has a mass of 1.5 kg. A beef shank sells for $10.00 with a mass of 2.5 kg. Compare the per pound cost for each item. (1 kg= 2.2 lb) Click here to see answer by RAY100(1637)   Question 213616: A whole chicken sells for $7.06 and has a mass of 1.5 kg. A beef shank sells for $10.00 with a mass of 2.5 kg. Compare the per pound cost for each item. (1 kg= 2.2 lb) Click here to see answer by stanbon(57307)   Question 213656: How do I solve 1/3 of 15? Click here to see answer by rfer(12657)   Question 213658: xy = 11 xz = 4c xz = 83 solve for c Click here to see answer by edjones(7569)   Question 213527: Click here to see answer by ichudov(499)   Question 213630: The speed limit on a certain highway is 72km/h. What is this speed in cm/s? Click here to see answer by ankor@dixie-net.com(15649)   Question 213630: The speed limit on a certain highway is 72km/h. What is this speed in cm/s? Click here to see answer by stanbon(57307)   Question 213688: The speed limit on a certain highway is 72 km/h. What is the speed in cm/s? Click here to see answer by drj(1380)   Question 213726: Gold has a density of 19.3g/cm^3. What is the mass in kilograms of one cubic meter of gold? Click here to see answer by drj(1380)   Question 213733: Click here to see answer by jim_thompson5910(28593)   Question 213733: Click here to see answer by ichudov(499)   Question 213735: solve algebraically, using one variable. find three consecutive intergers such that three times the sum of the first two intergers is three less than seven times the third. Click here to see answer by jim_thompson5910(28593)   Question 213746: 1/5(2x-7)=3/10x+5 Click here to see answer by drj(1380)   Question 213745: -4(a+1)-3a=7(2a-3)+3 Click here to see answer by drj(1380)   Question 213745: -4(a+1)-3a=7(2a-3)+3 Click here to see answer by jim_thompson5910(28593)   Question 212003: 100-4u/3=5u+6/6+6 Click here to see answer by checkley77(12569)   Question 213777: 1. x^3+216=0 2. 5x^3+30x^2+45x=0 3. 1/x^2+8/x+15=0 Click here to see answer by drj(1380)   Question 213791: (6/2x-2)-(1/x+1)=(2/2x+2)+1 Click here to see answer by ichudov(499)   Question 213816: 2x +3y=6 Click here to see answer by drj(1380)   Question 213822: Twenty-one more than three times a number is twelve less than the sum of the number and 5. Find the number. Click here to see answer by nerdybill(6958)   Question 213934: -3x+5=7 Click here to see answer by rfer(12657)   Question 213975: Hi, I tried to do this problem, and I would just like to check with you. The problem is: P=2L+2W solve for L so i subtracted 2W from both sides and got: P-2W=2L then i divided by 2 and got L=P-2W/2 am i correct? or is there something else that needs to be done? thanks in advance Click here to see answer by stanbon(57307)   Question 213975: Hi, I tried to do this problem, and I would just like to check with you. The problem is: P=2L+2W solve for L so i subtracted 2W from both sides and got: P-2W=2L then i divided by 2 and got L=P-2W/2 am i correct? or is there something else that needs to be done? thanks in advance Click here to see answer by checkley77(12569)   Question 213956: how do you solve A= 1/2bh for b? Click here to see answer by rfer(12657)   Question 213983: Please describe the range of the radii of most atoms in nanometers. Click here to see answer by stanbon(57307)   Question 213985: kirra is two years older then reggie. reggie is six times as old as delia. the average of their ages is nine years and four months. how old is each of them? Click here to see answer by Earlsdon(6287)   Question 213985: kirra is two years older then reggie. reggie is six times as old as delia. the average of their ages is nine years and four months. how old is each of them? Click here to see answer by drj(1380)   Question 213995: Oxygen and hydrogen react explosively to form water. In one reaction, 6g of hydrogen combines with oxygen to form 54g of water. How much oxygen was used? Click here to see answer by Alan3354(30993)   Question 214006: You are given an endpoint and the midpoint of a line segment. Find the coordinates of the other endpoint. Each midpoint is denoted by M(x, y) B (5,7) M (-1,0) Click here to see answer by drj(1380)   Question 214019: You are given an endpoint and the midpoint of a line segment. Find the coordinates of the other endpoint. Each midpoint is denoted by M(x, y) C(-4,-5) M(3,-6) Click here to see answer by drj(1380)   Question 214021: You are given an endpoint and the midpoint of a line segment. Find the coordinates of the other endpoint. Each midpoint is denoted by M(x, y) Q (-1,14) M (2,7) Click here to see answer by HyperBrain(694)   Question 214025: Find a counterexample that shows the statement is false. For every number n, 2^n>n +1 Click here to see answer by HyperBrain(694)   Question 214026: solve the equation: square root of 3q+1 - the square root of q-1 =2 Click here to see answer by HyperBrain(694)   Question 213867: Say that you have data table at the top its 1-5 & at the bottom its 16,32,48,64,, and,80 & you have to make an equation after it. Please help me. Click here to see answer by scott8148(6628)   Question 214081: factor completely: 3x^2-13x+14 Click here to see answer by drj(1380)   Question 214080: factor completely: 2x^2+20x+50 Click here to see answer by drj(1380)   Question 214093: how do i simplify the following Click here to see answer by ichudov(499)   Question 214126: My daughter is in 5th grade and learning "Hands on Equations" using manipulatives. I was never very good with algebra so I can't remember any of it and am no help to her. Are you familiar with this technique? Can you show me how to solve x + 2 + 2x = x + 10? This is not from a textbook...just an example for me. Thanks! Click here to see answer by jim_thompson5910(28593)   Question 214143: Input: number of days on vacation, Output: total cost of vacation in dollars, Rule: Cost is $1590 plus $200 per day. Use integer inputs from 1 to 5. write the rule as an equation. Click here to see answer by drj(1380)   Question 214255: Please help. My teacher said I need to show my work, but I'm not sure what I'm missing. 2c + 3 = 9 3 3 ___ ___ 0 6 C = 6 Click here to see answer by checkley77(12569)   Question 214309: As part of a new fitness program, Elsa alternates running and walking in a park nearby her house. The formula 3w +5r represent the distance she walked and ran in the park last week, where w represents the amount of time she spent walking and r represent the amount of time she spent running. Elsa walked for 3 hours and she ran for 5 hours. How many miles total did Elsa walk and run last week? Click here to see answer by stanbon(57307)   Question 214359: s=(n)/(2)[2a+(n-1)d] make d subject of formula Click here to see answer by Earlsdon(6287)   Question 214415: 6x+7=25 solve for x Click here to see answer by jim_thompson5910(28593)

---

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, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 17551..17595, 17596..17640, 17641..17685, 17686..17730, 17731..17775, 17776..17820, 17821..17865, 17866..17910, 17911..17955, 17956..18000, 18001..18045, 18046..18090, 18091..18135, 18136..18180, 18181..18225, 18226..18270, 18271..18315, 18316..18360, 18361..18405, 18406..18450, 18451..18495, 18496..18540, 18541..18585, 18586..18630, 18631..18675, 18676..18720, 18721..18765, 18766..18810, 18811..18855, 18856..18900, 18901..18945, 18946..18990, 18991..19035, 19036..19080, 19081..19125, 19126..19170, 19171..19215, 19216..19260, 19261..19305, 19306..19350, 19351..19395, 19396..19440, 19441..19485, 19486..19530, 19531..19575, 19576..19620, 19621..19665, 19666..19710, 19711..19755, 19756..19800, 19801..19845, 19846..19890, 19891..19935, 19936..19980, 19981..20025, 20026..20070, 20071..20115, 20116..20160, 20161..20205, 20206..20250, 20251..20295, 20296..20340, 20341..20385, 20386..20430, 20431..20475, 20476..20520, 20521..20565, 20566..20610, 20611..20655, 20656..20700, 20701..20745, 20746..20790, 20791..20835, 20836..20880, 20881..20925, 20926..20970, 20971..21015, 21016..21060, 21061..21105, 21106..21150, 21151..21195, 21196..21240, 21241..21285, 21286..21330, 21331..21375, 21376..21420, 21421..21465, 21466..21510, 21511..21555, 21556..21600, 21601..21645, 21646..21690, 21691..21735, 21736..21780, 21781..21825, 21826..21870, 21871..21915, 21916..21960, 21961..22005, 22006..22050, 22051..22095, 22096..22140, 22141..22185, 22186..22230, 22231..22275, 22276..22320, 22321..22365, 22366..22410, 22411..22455, 22456..22500, 22501..22545, 22546..22590, 22591..22635, 22636..22680, 22681..22725, 22726..22770, 22771..22815, 22816..22860, 22861..22905, 22906..22950, 22951..22995, 22996..23040, 23041..23085, 23086..23130, 23131..23175, 23176..23220, 23221..23265, 23266..23310, 23311..23355, 23356..23400, 23401..23445, 23446..23490, 23491..23535, 23536..23580, 23581..23625, 23626..23670, 23671..23715, 23716..23760, 23761..23805, 23806..23850, 23851..23895, 23896..23940, 23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975, 24976..25020, 25021..25065, 25066..25110, 25111..25155, 25156..25200, 25201..25245, 25246..25290, 25291..25335, 25336..25380, 25381..25425, 25426..25470, 25471..25515, 25516..25560, 25561..25605, 25606..25650, 25651..25695, 25696..25740, 25741..25785