Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 356240: 15x^4-28x^2+5=0
t^2-7t-18=0
3x^2-4x+7 when x=0
175r^2+490rg+343g^2
v^2+6v+9
2x^8-10x^7+10x^6
Click here to see answer by edjones(8007)

Question 356291: please help me solve this
v^2+6v+9
Click here to see answer by Alan3354(69443)

Question 356298: factor
80-18w+w^2
Click here to see answer by Alan3354(69443)

Question 356293: please help me solve this
3x^2-4x+7
when x=0
Click here to see answer by rfer(16322)

Question 356290: please help me solve this
2x^8-10x^7+10x^6
Click here to see answer by CharlesG2(834)

Question 356289: please help me solve this
175r^2+490rg+343g^2
Click here to see answer by Fombitz(32388)

Question 356377: What is the solution of the system? Use substitution.
3x+2y=7
y=-3x+11
Click here to see answer by Fombitz(32388)

Question 356389: 9j+35=4j
what is "j" equal to?
Click here to see answer by JBarnum(2146)

Question 356394: She gave away 6 radios as gifts, sold the rest for $10 more than she paid for each radio, and broke even. How many radios did she buy?
Click here to see answer by JBarnum(2146)

Question 356395: 13s=2s-66
what is s equal to?
Click here to see answer by edjones(8007)

Question 356429: Okay...
I have 4 questions.
1. 6q=6(4q+1) What is "q" equal to?
2. 7(t-2)-t=4 What is "t" equal to?
3. 6w+4=4w+1 What is "w" equal to?
4. 13s=2s-66 What is "s" equal to?
I really don't get this and it is really hard. I need an explanation for all please and thank you very much.
Click here to see answer by ewatrrr(24785)

Question 356467: -3(4x+3)+4(6x+1)=43
Click here to see answer by AJJordan(1)

Question 356463: 25-x=13+2
and
17+x=7+25
Click here to see answer by jim_thompson5910(35256)

Question 356506: how would you write this equation so that y is a function of x?
3+6x=11-4y???

Click here to see answer by checkley77(12844)

Question 356504: -2m^6/4m^3
m=-2
Thank you
Click here to see answer by checkley77(12844)

Question 355733: if you have 10 coins, comprised of nickels, dimes, and quarters, with a value of $.85, how many nickels, dimes, and quarters do you have?
.85 = .05N + .10D + .25Q
What's next?
Click here to see answer by nyc_function(2741)

Question 356575: Ok, I am taking a high school algebra class and am really struggling with this lesson. One of the problems is: Solve if possible:12p-7=-3p+8
Click here to see answer by stanbon(75887)

Question 356557: 3 over 2 y-y=4+one half y
Click here to see answer by Fombitz(32388)

Question 356625: 2x-y-3z=1, 4x+3y+2z=-4, -3x+2y+5z=-3 solve for x,y, and z
Click here to see answer by Fombitz(32388)

Question 356807: i'm in pre-algebra and don't know how to figure this one out or what steps to take 3-2 0ver5x=6 -2+1 over 6 x=7 over4
Click here to see answer by stanbon(75887)

Question 356817: My 4th grade son was given the equation 3x-9=70. The answer the teacher wanted was x=26.33333 (with a line over the last three to show that it repeats indefinitely). My question is: how is this a valid equation? When you plug the value of x back in, you are never going to get 70, but something that is slightly less than 70 (69.99999.....). My son did get the answer she wanted, but it was my understanding that the whole point of finding the value of the variable was finding the value that makes the equation true. A second algebra teacher tells me that this is a completely valid question but couldn't explain why it is valid when it is untrue. If someone could explain to me how 69.99999 = 70, I would be very grateful!
Click here to see answer by Fombitz(32388)

Question 356826: Hi, I was wondering if someone could help me. I have no idea how to complete this problem, and I need to show my work (steps). So, if anyone has any help they can provide, I would greatly appreciate it. Thank you.
Simplify

cubrt(27x^4y^10).

Explain your answer and show all steps.
Click here to see answer by sudhanshu_kmr(1152)

Question 356824: Is sqrt(x^2) = x for every real number x? Please explain your reasoning.
Click here to see answer by CharlesG2(834)

Question 356497: The sum of two numbers is 57. One of the numbers is 21. Which of the following equations could be used to find the other number?
Click here to see answer by Fombitz(32388)

Question 356830: How many 1 1/2" x 1 1/2" square pieces can you get out of 1 square foot?
Click here to see answer by ewatrrr(24785)

Question 356925: 9 + 3(6-2)Squared
Can you help with this?
Click here to see answer by Alan3354(69443)

Question 356773: 17280(1-10%)^x = 11340
find x
Click here to see answer by Alan3354(69443)

Question 356987: Allyson is a nurse in the intensive care unit of a hospital. She works with units daily in administering drugs through intravenous (i.v.) tubes. A common dosage for the drug dopamine is 2 to 5 micrograms per kilogram of body weight per minute. She will put 400 milligrams of dopamine into 250 cc (cubic centimeters) of fluid and administer it into a patient through an i.v. tube. At what rate, in cc/hr, should she set the flow to achieve a dosage of 3 micrograms per kilogram per minute into a patient with a mass of 75kg?

Click here to see answer by mananth(16946)

Question 356986: Give all solutions for x in the equation: |x|-4=22-9. Explain how you solved for x in a complete sentence.
Click here to see answer by Fombitz(32388)

Question 357055: I need help to assist my 7th grader.
How to set up ratio....
Phone Plan 1 is $.18 per minute
Phone Plan 2 is $50 base plan and $.10 per minute.
At what point is it cheaper to use plan 1?
How do I show her how to do this?
Click here to see answer by nerdybill(7384)

Question 357065: How do I solve for x in this equation?
x + (x * 5%) = 3
More to the point, the problem definition is this:
How do I get back to the base number when the result was computed by adding the base number to a percentage times the base number (ie. I know the result and the percentage)?
Click here to see answer by mananth(16946)

Question 357145: y=1/3x-6
Click here to see answer by jim_thompson5910(35256)

Question 357165: solve the following system of equations
x+5y= 8 (1)
x= 5-5y (2)
Click here to see answer by stanbon(75887)

Question 357162: On three consecutive passes, a football team gain 6 yards, loses 24 yards and gains 49 yards What number represents the total net yardage
would I set the equation up like this

x=64-24+49
Having problems can some one please help me
Click here to see answer by jim_thompson5910(35256)

Question 357150: A ball is thrown upward with an inital speed of 24.5 m/s. When is it 29.4 m high?
Click here to see answer by ankor@dixie-net.com(22740)

Question 357222: 3(a+b), for a=2 and b=4. I do not understand any of this. I need help. Thank you!
Click here to see answer by robertb(5830)

Question 357251: three times the sum of a number and 4 is the same as 18 more than the number
Click here to see answer by mananth(16946)

Question 357353: What equation would I use to find gas mileage if x= number of miles driven on 60 gallons of gas?
Click here to see answer by ewatrrr(24785)

Question 357355: how do you go from
(x+1)^3-1 to x(x^2+3x+3)
thank you
Click here to see answer by ewatrrr(24785)

Question 357306: The length of a conference room is one and a half times its width.A carpet that is twice as long as it is wide is placed in the center of the room, leaving a 3m wide border round the carpet.Find the area of the carpet.
Click here to see answer by edjones(8007)

Question 357373: 12+2y=5y-12+5y
solve this equation and show steps..please and thankyou
Click here to see answer by ewatrrr(24785)

Question 357394: the steps to find the answer of 3 over 5 =-12
3/5x= -12
Click here to see answer by Theo(13342)

Question 357463: Show that if the x- and y- intercepts of a line are nonzero numbers a and b, then the equation of the line can be written in the form (x/a) + (y/b) = 1.
The main thing I'm stuck on is what equation to start off with. I've tried point-slope form, and I seem to get there, but I don't understand how to get the 1 into the equation.
Click here to see answer by scott8148(6628)

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, 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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