Questions on Algebra: Equations answered by real tutors!

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Question 168071: Need help with factoring
Factor
3x^3y-12xy^3+6x^4y^2
Click here to see answer by ankor@dixie-net.com(22740)

Question 168180: Please help me with this equation. The title of the page is Solving two-step eqautions. 37-4v=57.4
Click here to see answer by jim_thompson5910(35256)

Question 168180: Please help me with this equation. The title of the page is Solving two-step eqautions. 37-4v=57.4
Click here to see answer by blake_m(1)

Question 168187: What is the equation for these rules:
The area of a triangle is one-half its base multiplied by its height.
Three big marshmallows are needed to make each s'more.
The number of quarters in an amount of money expressed in dollars is four times the number of dollars.
A half-cup of unpopped popcorn is needed to make 6 cups of popped popcorn.

Click here to see answer by stanbon(75887)

Question 168222: Solve: x+2/3-4= -x/2
Click here to see answer by jim_thompson5910(35256)

Question 168189: P+7/2=-5/4
Click here to see answer by checkley77(12844)

Question 168132: what is tha answer to 21=x+9
Click here to see answer by checkley77(12844)

Question 168131: what is tha answer to 21=x+9
Click here to see answer by checkley77(12844)

Question 168300: PLEASE HELP ME WITH THIS "EXPRESS THE FOLLOWING REAL NUMBER AS THE QUOTIENT OF TWO INTEGERS"
1. 5 7/8
2. 25
3. 0
4. 10.62
Click here to see answer by stanbon(75887)

Question 168310: I am trying to solve x+3/10 = -2/5
I have tried working it with the addition principle.
x+3/10 = -2/5
x + 3/10-3/10= -2/5-3/10
x = -5/10
However, the solution is said to be x= -7
-5/10 + 3/10 = -2/5
How does -7/10 - 3/10 = -2/5 ?
Click here to see answer by Mathtut(3670)

Question 168344: how do you add or subtract a number and a variable?
Click here to see answer by Fombitz(32388)

Question 168367: This may seem easy, but it is harder than it appears. The problem is V=1/3Ar (solve for r). Thanks in advance.
Click here to see answer by Mathtut(3670)

Question 168370: slove for x :3(x-10)=-x+18
Click here to see answer by checkley77(12844)

Question 168385: I need to determine x, y and z when x+y+z=1150 and x=4z-100 and x=6y+50. So far the only thing I have figured out is that 1150=1150. Not a good answer.
Can someone please help.
Click here to see answer by stanbon(75887)

Question 168428: Yoshi's grade will be attending a brand new school next year. Students who will be attending the school are going to vote on the mascot for the school. To predict which mascot student will choose, Yoshi asks all of the students at her lunch table for the preferences. Is the repressentative sample? Why or why not?
Click here to see answer by stanbon(75887)

Question 168433: Suppose y varies directly as x and y=27 when x=3. Find x when y=45.

Suppose y varies inversely as x and y=24 when x=3. fond x when y=36.

Write the point-slope form of an equation for the line passing through the point at (3,-6) with slope -4/3.

Write an equation in slope-intercept form for the line through points (2,4) and (6,-2).
Determine the slope and y-intercept of the graph of 12+3y=-2x
Click here to see answer by stanbon(75887)

Question 168458: I'm having trouble figuring out this problem to MAKE an equation: [Sean is 20 and his brother is 12. How many years ago was Sean three times as old as his brother?]
Click here to see answer by midwood_trail(310)

Question 168440: Jose can clear a lot in 9.5 hours. His partner can do the same job in 11.5 hours. How long will it take them to clear the lot working together?
Click here to see answer by midwood_trail(310)

Question 168488: Can someone please help, I put the problem down then I wrote it out in word form just in case it didn't make since in problem form. I do not understand how to solve for x, thanks in advance.
Solve each of the following for x, where x is a real number.
1. x√3-2=5x√3 wrote out: (x square root 3 minus 2)equals(5x square root 3)
2. 0.9-x=1 (0.9=.99..) wrote out: 0.9 the nine has a line over the top of it -x=1 ( 0.9 ( nine has a line over top it = .99.....)
3. 0.4 + x=1 (0.4=.44....)wrote out: 0.4 ( line over top 4)+x=1 ( 0.4 (line over top 4)=.44....)
4. 5.2x-0.01<0.2x+3.6

Click here to see answer by stanbon(75887)

Question 168549: the number of mosquitoes M(x)in millions, in a certain area depends on the june rainfall x, in inches, according to the function M(x) =12x-x^2 What rainfall produces the maximum number of mosquitoes

Click here to see answer by gonzo(654)

Question 168599: solve for x: 3x + 13 = x + 1
Click here to see answer by checkley77(12844)

Question 168599: solve for x: 3x + 13 = x + 1
Click here to see answer by iluvbuilding429(41)

Question 168609: 1/3(2-5p)= -13 please help me solve this step by step thanks
Click here to see answer by midwood_trail(310)

Question 168653: 8x-16+8x=16
Click here to see answer by Mathtut(3670)

Question 168663: What is 9m=7m+10?
Click here to see answer by midwood_trail(310)

Question 168676: Say you have a problem like a(b)+c=d, how do you solve for d?
Click here to see answer by stanbon(75887)

Question 168682: Please help me solve this equation:
10y4 � 35y3 + 5y2
______________
5y2
Click here to see answer by stanbon(75887)

Question 168717: How do I solve problems like 3x+5=4x-10
Click here to see answer by jim_thompson5910(35256)

Question 168755: Hi, I am taking an algebra class online and need help. I do not have the barcode of the book because I print out the chapters given online. anyway here is the problem.I have figured out how to work the problem except for one area.
4y-5+y+23=6y+20-3y
5y+18=3y+20
Ok,I know how to get the 18 and the 3y, but what do I do to get the 5y? On my homework, I can have the MathLab help me with the homework answer for a certain problem, but then I'll need to do another problem to get credit. I'm having a big problem figuring out how to get to the 5y. Can you help? I failed the first class and this is my second time around for this class online.
Candy
Click here to see answer by checkley77(12844)

Question 168811: show me how to solve this problem
2/8=n+4/n-4 and provide the answer thank you in advance for your help um 1
Click here to see answer by mathishard2do(2)

Question 168811: show me how to solve this problem
2/8=n+4/n-4 and provide the answer thank you in advance for your help um 1
Click here to see answer by jim_thompson5910(35256)

Question 168822: Erin has red, blue, and yellow barrettes. She has 5 times as many blue barrettes as red barrettes, and 2 times as many yellow barrettes as red barrettes. Altogether, she has 24 barrettes. How many of each color does she have?
Click here to see answer by gonzo(654)

Question 168813: I'm having a hard time figuring out this literal equation 2y-2/3x+6=0 for y.
How do you get an answer for y?
Click here to see answer by gonzo(654)

Question 168851: complete each ordered pair so that it satisfies the given equation:
y=2x+5:(8,?),(-1,?),(?,-1)
I figured out 8,21 and -1,3, but I am thrown on the last pair
Click here to see answer by Mathtut(3670)

Question 168853: X/4+X/5=9

Click here to see answer by Mathtut(3670)

Question 168853: X/4+X/5=9

Click here to see answer by jim_thompson5910(35256)

Question 168903: Factor completely 2x^3y^2-10x^2y+12xy
Click here to see answer by stanbon(75887)

Question 168953: Solve the inequality (multiple choice):

A) (-infinity,0]
B) no solution
C) all real numbers
D) (-infinity,-1]union[0,infinity)
Click here to see answer by stanbon(75887)

Question 169078: 1. 4(x � 1) + 6 = 3x + 1 � 2x (solve for x)
2. (x � 2)/4 � 1/5 = (7x + 1)/20
3. Find the area of a triangle whose base is 1.3 feet and whose height is 1.5 feet.
Click here to see answer by checkley77(12844)

Question 169076: solve for the unknown:
2/3 /10 = 1.8/ r
r= ?
These are two sets of fractions with an = sign in the middle.
I really don't know where to start. Maybe cross multiply?
Click here to see answer by checkley77(12844)

Question 169082: 1. Use the midpoint formula to find the midpoint of a line segment with endpoints: (2, 7) and (-4, 1)
2. Algebraically find the x and y intercepts of the equation 3x - 5y = 10 and write each as an ordered pair.
3. Solve for x. Collect xs on the LEFT side. The solution should be presented with x first, the correct inequality symbol, then the number.
2(x + 3) > 20
4. Solve for x. Collect xs on the LEFT side. The solution should be presented with x first, the correct inequality symbol, then the number.
11x + 3 � 13x � 7 < 2(5 + 4x)
5. Fill in the chart given this linear equation:
2x + y = 42.
Type all your work below the chart.
x y
-2
-1
0
1
2

6. The linear equation x = -1 graphs as a horizontal/vertical/diagonal line (choose the correct label and type it below). Describe how you determined your answer.

Click here to see answer by jim_thompson5910(35256)

Question 169090: Solve (x+5)/x=5
Click here to see answer by checkley77(12844)

Question 169088: Solve (x+5)/x=5
Click here to see answer by checkley77(12844)

Question 169091: (5x)/x=5
Click here to see answer by Alan3354(69443)

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, 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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