Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 426846: On a map, the length of a nature center trail is 9.7 centimeters. If the scale is 1 centimeter to 49 kilometers, what is the actual length of the trail? round to nearest tenth.
Click here to see answer by Gogonati(855)

Question 426996: L=m/9-3n solve for m
Click here to see answer by stanbon(75887)

Question 427061: Solve the following system of equations using substitution.
2x+4y=12
4x+16y=8
I substituted 2x+4y for x in the second equation and I ended up with 8x+32y=8. I've tried so many of these problems and I just can't understand them.
Click here to see answer by ewatrrr(24785)

Question 427172: I am having trouble comming up with an an equation to solve the following problem. Please help.
In a certain number of hours a man traveled 36 Km. If he had travelled 1.5 Km/h faster, it would have taken 3 hours less to make the journey How many kiometers did he travel per hour.
Click here to see answer by lwsshak3(11628)

Question 427306: evaluate n^3when n=5
n^3=
Click here to see answer by Theo(13342)

Question 427307: convert to decimal notation
10^-5=
Click here to see answer by MathLover1(20849)

Question 427330: c=5/9(f-32)for f (fahrenheit to celsius)
Click here to see answer by stanbon(75887)

Question 427327: solve each formula for the specified variable: perimeter of triangle
P=a+b+c for b for c
Click here to see answer by MathLover1(20849)

Question 427417: Solve by the elimination method
5r - 8s = -3
8r + 5s = 102
I came up with (9,6) r being 9 and s being 6. Is that correct?

Click here to see answer by ewatrrr(24785)

Question 427524: solve the following equation for m
p=6n-5m/14
Click here to see answer by algebrahouse.com(1659)

Question 427545: 48 equals a number increased by 6, and the sum, all multiplied by 5.
.
Click here to see answer by algebrahouse.com(1659)

Question 427619:
Click here to see answer by Billybikie(2)

Question 427469: how to solve 2X^2+X=10
Click here to see answer by Billybikie(2)

Question 427646: (6-4){2-4(-8)}
Click here to see answer by Alan3354(69443)

Question 427765: -3/4=-1/2-3/4x
Click here to see answer by stanbon(75887)

Question 427765: -3/4=-1/2-3/4x
Click here to see answer by ewatrrr(24785)

Question 427768: 2/3m=9
how do you solve
Click here to see answer by ewatrrr(24785)

Question 427805: -4x>1/11 What is the solution set?
Click here to see answer by rfer(16322)

Question 427920: Hii.. I'm really stuck on solving this:: 5x+3+(-x)=2x+1+2x+3 can u help me thanks
Click here to see answer by josmiceli(19441)

Question 427950: what is the solution of 27=3/4t?
Click here to see answer by jorel1380(3719)

Question 428085: I need help with these 2 problems, and I beg you to please explain the equations step by step because I am just a FITH GRADER so I can understand it. Thanks a lot in advance.
1) Betty ate one third of her strawberries for snack. She had 12 left in her basket. How many did she have in the basket before she had her snack?
2) Sonia spent one third of her money, she then lost half of what she had left. She then had $ 6. How much money did she start with?

Click here to see answer by htmentor(1343)

Question 428102: one pump can drain a pool in 12 minutes. when a second pump is also used the pool only takes 9 minutes to drain.how long would it take the second pump to drain the pool if it were the only pump
Click here to see answer by htmentor(1343)

Question 428131: 3x+4y=15
-4x-3y=-20
I need to solve this through the addition method. Is there an easy way to do this?
Click here to see answer by htmentor(1343)

Question 428131: 3x+4y=15
-4x-3y=-20
I need to solve this through the addition method. Is there an easy way to do this?
Click here to see answer by solver91311(24713)

Question 428133: 2x+59=8x+11 what does x equal"
Click here to see answer by nerdybill(7384)

Question 428132: 2x+29=8x+11 what does x equal?
Click here to see answer by nerdybill(7384)

Question 428180: 1. f(x)= x^3 - 3x^2 + x + 1
2. f(x)=sinx + 1 on [-2pi, 2pi]
3. f(x)=(x^2)(e^(-4x))
(a) Find the x- and y-intercepts of the function.
(b) Draw a number line for f:
(c) Find all critical numbers for f prime:
(d) Draw a number line for f prime:
(e) Find all zeros of f double prime:
(f) Draw a number line for f double prime:
(h) Find all inflection points of f:
(i) Sketch the graph of f. Label all inflection points. Label your axes.
Click here to see answer by richard1234(7193)

Question 428443: simplyfy 6-{3-2[5-(-10)]+7]
Click here to see answer by rfer(16322)

Question 428449: -31=8-6p-7p
Click here to see answer by rfer(16322)

Question 428521: how do you get the solution to 4(y - 2) = 2(y + 4) + 2
Click here to see answer by Gogonati(855)

Question 428615: If 8*(C-7)-3C=29, what is C?

Click here to see answer by lammy60(2)

Question 428610: an orange costs N cents and an apple costs 15 cents more.The total cost of 6 oranges and 8 apples is $11.70, what is N?

Click here to see answer by Gogonati(855)

Question 428799: I would like to find out the equation for figuring out how long in seconds that it would take my train which is "x" feet long to completely pass through "y" length of railroad at a given rate speed which is "z" miles per hour.
Your help is greatly appreciated and thank you for assisting those that never took algebra in school (or at least that I remember.)
Click here to see answer by stanbon(75887)

Question 428951: How do I solve x-3/5-1=x-5/4 ???
Click here to see answer by stanbon(75887)

Question 428575: what is the answer to this equation?
u+mE= 0(sEx x 2d) =mE
Click here to see answer by richard1234(7193)

Question 429013: 2x+4=5x+18
Click here to see answer by edjones(8007)

Question 429047: can someone plss help me i would really appreciate it
add or subtract as indicated. write each answer in lowest terms.
x-y/5 - x+y/5
Click here to see answer by Gogonati(855)

Question 429049: can someone plss help me i would really appreciate it
add or subtract as indicated. write each answer in lowest terms.
x-1/x+6 + x+3/x-2
Click here to see answer by ewatrrr(24785)

Question 429051: can someone plss help me i would really appreciate it
add or subtract as indicated. write each answer in lowest terms.
-4/y^2-4 - 3+y/2y-4
Click here to see answer by ewatrrr(24785)

Question 429139: Hi,
Can someone please help me solve 4y=-28+7x
I need to find the y and x intercepts and graph.
I do not understand how to solve this.
Pamela G
Click here to see answer by nerdybill(7384)

Question 429159: can someone help pretty please
find the least common denominator.
17. 2m+3/m^2-25 and 4m-2/m^2+3m-10
Click here to see answer by ewatrrr(24785)

Question 429103: how long will it take a bus traveling at 60 miles per hour to overtake a car traveling at 40 mph if the car had a 1.5 hour head start?
Click here to see answer by jorel1380(3719)

Question 429196: √54x^3y^5
Click here to see answer by stanbon(75887)

Question 429283: Please help with this word problem:
Albert earns $78 for working 6 hours. Which equation could be used to find the number of dollars, d, that Albert earns in 9 hours?
A. 78/d = 9/6
B. 78d - 6+9
C. 6+9 = 78 + d
D. 6d = 78 + 9.
This is for my nephew, he is in eigth grade excelerated math and did not like my answer. He would like an explanation as to why the other answers do not work as well. He is very intelligent and has been accepted to pre-navel academy. Any help would be appreciated.
Click here to see answer by ankor@dixie-net.com(22740)

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, 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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, 25786..25830, 25831..25875, 25876..25920, 25921..25965, 25966..26010, 26011..26055, 26056..26100, 26101..26145, 26146..26190, 26191..26235, 26236..26280, 26281..26325, 26326..26370, 26371..26415, 26416..26460, 26461..26505, 26506..26550, 26551..26595, 26596..26640, 26641..26685, 26686..26730, 26731..26775, 26776..26820, 26821..26865, 26866..26910, 26911..26955, 26956..27000, 27001..27045, 27046..27090, 27091..27135, 27136..27180, 27181..27225, 27226..27270, 27271..27315, 27316..27360, 27361..27405, 27406..27450, 27451..27495, 27496..27540, 27541..27585, 27586..27630, 27631..27675, 27676..27720, 27721..27765, 27766..27810, 27811..27855, 27856..27900, 27901..27945, 27946..27990, 27991..28035, 28036..28080, 28081..28125, 28126..28170, 28171..28215, 28216..28260, 28261..28305, 28306..28350, 28351..28395, 28396..28440, 28441..28485, 28486..28530, 28531..28575, 28576..28620, 28621..28665, 28666..28710, 28711..28755, 28756..28800, 28801..28845, 28846..28890, 28891..28935, 28936..28980, 28981..29025, 29026..29070, 29071..29115, 29116..29160, 29161..29205, 29206..29250, 29251..29295, 29296..29340, 29341..29385, 29386..29430, 29431..29475, 29476..29520, 29521..29565, 29566..29610, 29611..29655, 29656..29700, 29701..29745, 29746..29790, 29791..29835, 29836..29880, 29881..29925, 29926..29970, 29971..30015, 30016..30060, 30061..30105, 30106..30150, 30151..30195, 30196..30240, 30241..30285, 30286..30330, 30331..30375, 30376..30420, 30421..30465, 30466..30510, 30511..30555, 30556..30600, 30601..30645, 30646..30690, 30691..30735, 30736..30780, 30781..30825, 30826..30870, 30871..30915, 30916..30960, 30961..31005, 31006..31050, 31051..31095, 31096..31140, 31141..31185, 31186..31230, 31231..31275, 31276..31320, 31321..31365, 31366..31410, 31411..31455, 31456..31500, 31501..31545, 31546..31590, 31591..31635, 31636..31680, 31681..31725, 31726..31770, 31771..31815, 31816..31860, 31861..31905, 31906..31950, 31951..31995, 31996..32040, 32041..32085, 32086..32130, 32131..32175, 32176..32220, 32221..32265, 32266..32310, 32311..32355, 32356..32400, 32401..32445, 32446..32490, 32491..32535, 32536..32580, 32581..32625, 32626..32670, 32671..32715, 32716..32760, 32761..32805, 32806..32850, 32851..32895, 32896..32940, 32941..32985, 32986..33030, 33031..33075, 33076..33120, 33121..33165, 33166..33210, 33211..33255, 33256..33300, 33301..33345, 33346..33390, 33391..33435, 33436..33480, 33481..33525, 33526..33570, 33571..33615, 33616..33660, 33661..33705, 33706..33750, 33751..33795, 33796..33840, 33841..33885, 33886..33930, 33931..33975, 33976..34020, 34021..34065, 34066..34110, 34111..34155, 34156..34200, 34201..34245, 34246..34290, 34291..34335, 34336..34380, 34381..34425, 34426..34470, 34471..34515, 34516..34560, 34561..34605, 34606..34650, 34651..34695, 34696..34740, 34741..34785, 34786..34830, 34831..34875, 34876..34920, 34921..34965, 34966..35010, 35011..35055, 35056..35100, 35101..35145, 35146..35190, 35191..35235, 35236..35280, 35281..35325, 35326..35370, 35371..35415, 35416..35460, 35461..35505, 35506..35550, 35551..35595, 35596..35640, 35641..35685, 35686..35730, 35731..35775, 35776..35820, 35821..35865, 35866..35910, 35911..35955, 35956..36000, 36001..36045, 36046..36090, 36091..36135, 36136..36180, 36181..36225, 36226..36270, 36271..36315, 36316..36360, 36361..36405, 36406..36450, 36451..36495, 36496..36540, 36541..36585, 36586..36630, 36631..36675, 36676..36720, 36721..36765, 36766..36810, 36811..36855, 36856..36900, 36901..36945, 36946..36990, 36991..37035, 37036..37080, 37081..37125, 37126..37170, 37171..37215, 37216..37260, 37261..37305, 37306..37350, 37351..37395, 37396..37440, 37441..37485, 37486..37530, 37531..37575, 37576..37620, 37621..37665, 37666..37710, 37711..37755, 37756..37800, 37801..37845, 37846..37890, 37891..37935, 37936..37980, 37981..38025, 38026..38070, 38071..38115, 38116..38160, 38161..38205, 38206..38250, 38251..38295, 38296..38340, 38341..38385, 38386..38430, 38431..38475, 38476..38520, 38521..38565, 38566..38610, 38611..38655, 38656..38700, 38701..38745, 38746..38790, 38791..38835, 38836..38880, 38881..38925, 38926..38970, 38971..39015, 39016..39060, 39061..39105, 39106..39150, 39151..39195, 39196..39240, 39241..39285, 39286..39330, 39331..39375, 39376..39420, 39421..39465, 39466..39510, 39511..39555, 39556..39600, 39601..39645, 39646..39690, 39691..39735, 39736..39780, 39781..39825, 39826..39870, 39871..39915, 39916..39960, 39961..40005, 40006..40050, 40051..40095, 40096..40140, 40141..40185, 40186..40230, 40231..40275, 40276..40320, 40321..40365, 40366..40410, 40411..40455, 40456..40500, 40501..40545, 40546..40590, 40591..40635, 40636..40680, 40681..40725, 40726..40770, 40771..40815, 40816..40860, 40861..40905, 40906..40950, 40951..40995, 40996..41040, 41041..41085, 41086..41130, 41131..41175, 41176..41220, 41221..41265, 41266..41310, 41311..41355, 41356..41400, 41401..41445, 41446..41490, 41491..41535, 41536..41580