Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 71887: Solve the following systems by addition. If a unique solution does not exist, state whether the system is inconsistent or dependent.
x + 5y = 10
-2x - 10y = -20
Click here to see answer by psbhowmick(529)

Question 71821: Solve the system by addition.

Click here to see answer by rcmcc(152)

Question 71891: Given f(x) = 5x2 – 3x + 1, find f(–2).
Click here to see answer by tutorcecilia(2152)

Question 71883: Solve each of the following systems by graphing
2x - y = 4
2x - y = 6
Click here to see answer by tutorcecilia(2152)

Question 71929: I don't know where to start. Can you explain what I am meant to be doing to solve these two questions?
a) 3x + 2y = 5
y = 5x - 17
b) 2x + 3y = 21
x - y = 18
Click here to see answer by stanbon(57967)

Question 71895: Solve the system by graphing.
x – y = 5
x + y = 3

Click here to see answer by checkley75(3666)

Question 71881: Solve the following system by using either addition or substution. If a unique solution does not exist, state whethher the system is depent or inconsistent.
10x + 2y = 7
y = -5x + 3
Click here to see answer by elima(1433)

Question 71882: Solve the following systems by substitution.
4x - 12y = 5
-x + 3y = -1
Click here to see answer by elima(1433)

Question 71977: x+3y=12
2x-4y=24

Click here to see answer by checkley75(3666)

Question 72020: Which of the following equations is an example of a direct variation?
y = 4x
x = -4
x -2y = 7
y = 5/x

Please show all work
Thank you

Click here to see answer by stanbon(57967)

Question 72018: Solve the following system of equations using the substitution method:
4x - y = -6
x + 2y = 3
please show work
Click here to see answer by elima(1433)

Question 72021: Could someone please help me solve and show the work associated:

Question 41
Solve the following expression when x = 4, and y = -3.
2(x-2y)
Question 44
Find: - 8xy(4x2y + 7x - 6y2)
- 12x2 - x2 - 8xy2

Click here to see answer by checkley75(3666)

Question 72120: Please help me solve this equation...

This is on the chapter review page 190 problem #12
Click here to see answer by ankor@dixie-net.com(15746)

Question 72160: Two important reference points for temperature are the boiling point and the freezing point of water. water freezes at 0degreesC or 32degreesF. Water boils at 100degreesC or 212degreesF.
Use this information to write an equation for the relationship between Fahrenheit degrees and Cecius degrees.
Click here to see answer by stanbon(57967)

Question 72177: 10-x+3x=2x-7+5x
solving for the unknown
not sure of the steps to solve this one because the varible is on both sides
I was given this question and asked to write it down from the board
Click here to see answer by stanbon(57967)

Question 72208: [1/(a5b)]-[5/(ab3)]
Click here to see answer by pradhyumna.kumar@gmail.com(62)

Question 72212: Simply the complex fraction if possible
4+(3/y)/1-(2/y)
Click here to see answer by rmromero(383)

Question 72212: Simply the complex fraction if possible
4+(3/y)/1-(2/y)
Click here to see answer by pradhyumna.kumar@gmail.com(62)

Question 72212: Simply the complex fraction if possible
4+(3/y)/1-(2/y)
Click here to see answer by stanbon(57967)

Question 72211: Factor if possible
2
2x +7x=3
Click here to see answer by Sandacious(9)

Question 72225: Solve the equation for y
(y-2)/(x-4)= -2
Click here to see answer by Sandacious(9)

Question 72227: solve
Xsquare-25=0
Click here to see answer by Sandacious(9)

Question 72223: Solve the equation
x/3=4/(x+1)
Click here to see answer by Sandacious(9)

Question 72236: perform the indicated operation
(2x-2Y)/3 times 1/(y-x)
Click here to see answer by rmromero(383)

Question 72233: Rationalize the denominator

square root of 11 / square 0f 7 =

Click here to see answer by jim_thompson5910(28715)

Question 72235: Reduce to the lowest term if possible; state any restrictions on the variable
(3x+15)/(3xsquared+ 24x+45)
Click here to see answer by rmromero(383)

Question 72238: Simplpfly
square root of 2/ ( square root of 2 + square root of 5)

Click here to see answer by jim_thompson5910(28715)

Question 72188: eqautions and inequalities
x^2 – x – 20 find the positive discriminant
X^2 – 16x + 64 find zero discriminant
3x2 + 4x + 2 find negative discriminant

1) Value for : a=1, b= -1, c =
2)Calculation
3)Value of discriminant
4)What the value of the discriminant means to the graph
explain what this means to the graph : y=ax^2 + bx + c

Click here to see answer by rmromero(383)

Question 72252: Factor by taking out the greastest common factor if possible
121y^4-11x^4
Click here to see answer by rmromero(383)

Question 72256: Write this using radical notation
-X^-3/4=
Click here to see answer by stanbon(57967)

Question 72255: Evaluate the expression
(4w^-2t^-4)^-12
Click here to see answer by stanbon(57967)

Question 72264:
Click here to see answer by Edwin McCravy(8999)

Question 72264:
Click here to see answer by Sandacious(9)

Question 72264:
Click here to see answer by madthehack(1)

Question 72251: find the principal root __ Öm²

Click here to see answer by Edwin McCravy(8999)

Question 72250: [1/(a^5b]- [5/(ab^3)]
Click here to see answer by pradhyumna.kumar@gmail.com(62)

Question 72122: ordered pairs >
2y-5x=16
2x+3y=13
Click here to see answer by pradhyumna.kumar@gmail.com(62)

Question 72022: 17-2p=-4+p How do I solve this problem.
Click here to see answer by terbear1963(43)

Question 72300: help with solving for I in E= IR I'm a bit of a novice in Algebra
Click here to see answer by checkley75(3666)

Question 72343: Factor if possible
2x^2+7x+3
Click here to see answer by Edwin McCravy(8999)

Question 72358: Working as a team ,8 mathletes can solve 20 problems in 10 minutes. At this rate, how many mathletes are needed in order to solve 30 problems in 5 minutes.
Click here to see answer by stanbon(57967)

Question 72367: (X^2 + 2xy +Y^2)-49
Click here to see answer by stanbon(57967)

Question 72405: 17x/25 = 51/50
Click here to see answer by pradhyumna.kumar@gmail.com(62)

Question 72447: square root of 5y+8=6
Click here to see answer by Edwin McCravy(8999)

Question 72434: Bob paid for his breakfast with 36 coins consisting of dimes and quarters. if the bill was 4.50 then how amny of each type of coin did he use.
Click here to see answer by Edwin McCravy(8999)

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, 25786..25830, 25831..25875, 25876..25920, 25921..25965