Questions on Algebra: Equations answered by real tutors!

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Question 144896: How do you know when an equation has infinitely many solutions? How do you know when an equation has no solution?(Post within plenty of explaining 75 words)
Click here to see answer by stanbon(75887) About Me 

Question 144890: A measuring tape drops from a roof that is 16 feet above the ground. After how many seconds does the measuring tape land on the ground?
How would you write the equation?

Click here to see answer by Alan3354(69443) About Me 

Question 144929: Us the substitution method to solve the following system
1/5x+1/5y=9
1/3x-1/4y=8

Click here to see answer by stanbon(75887) About Me 

Question 144927: Use the substitution to solve the following system
x+7y=2
6y+2x=-20

Click here to see answer by checkley77(12844) About Me 

Question 145018: express each equation in slope-intercept form. then determin, without silving the system, whether the system of equations has exactly one solution, none, or an infinite number
4x+6y=26
-6x-9y=-39

Click here to see answer by jim_thompson5910(35256) About Me 
Question 145018: express each equation in slope-intercept form. then determin, without silving the system, whether the system of equations has exactly one solution, none, or an infinite number
4x+6y=26
-6x-9y=-39

Click here to see answer by solver91311(24713) About Me 
Question 145018: express each equation in slope-intercept form. then determin, without silving the system, whether the system of equations has exactly one solution, none, or an infinite number
4x+6y=26
-6x-9y=-39

Click here to see answer by Alan3354(69443) About Me 

Question 145021: I need help with 2 homework problems. I can use any method (elimination, subtitution or graphical methods) the problems are 5x + 6y = 14
-3y + x = 7 I got (35/12, -7/12)

next problem 2x/3 + 3y/4 = 11/12

x/3 + 7y/18 = 1/2



(I got (8/5, -3/35)

Click here to see answer by jim_thompson5910(35256) About Me 
Question 145021: I need help with 2 homework problems. I can use any method (elimination, subtitution or graphical methods) the problems are 5x + 6y = 14
-3y + x = 7 I got (35/12, -7/12)

next problem 2x/3 + 3y/4 = 11/12

x/3 + 7y/18 = 1/2



(I got (8/5, -3/35)

Click here to see answer by Alan3354(69443) About Me 

Question 145054: Can you explain how to figure this problem (6±√8)/2 and provide answer ?
Thank You.

Click here to see answer by stanbon(75887) About Me 
Question 145054: Can you explain how to figure this problem (6±√8)/2 and provide answer ?
Thank You.

Click here to see answer by jim_thompson5910(35256) About Me 

Question 145080: PLEASE HELP ME!! child%27s+dose+equals+1+over+11+multiplied+by+22+simplified
Click here to see answer by stanbon(75887) About Me 

Question 145200: BENNET CUSTOM FLOORING HAS 0.5 GAL OF STAIN THAT IS 20% BROWN AND 80% NEUTRAL. A CUSTOMER ORDERS 1.5 GAL OF A STAIN THAT IS 60% BRONW AND 40% NEWUTRAL. HOW MUCH PURE BROWN STAIN AND HOW MUCH NEUTRAL STAIN SHOULD BE ADDED TO THE ORIGINAL 0.5 GAL IN ORDER TO MAKE UP THE ORDER?
Click here to see answer by ankor@dixie-net.com(22740) About Me 

Question 145230: Name the coordinate described here:
From the origin, the point is six places to the right and five places up.

Click here to see answer by jim_thompson5910(35256) About Me 

Question 145231: The linear equation y = 3x – 5 graphs as a horizontal/vertical/diagonal line (choose the correct label and type it below).
Click here to see answer by jim_thompson5910(35256) About Me 

Question 145311: 3x+4y+z= 153
Click here to see answer by Alan3354(69443) About Me 

Question 145323: I can't get the right answers to the following questions.
20-1/3X = 1/2X
3-3x (greater than) 12
4(X = 5) greater than 3x +7
0.3x +1.7 =0.2x-0.4(5x=1)

Click here to see answer by stanbon(75887) About Me 

Question 145377: can you tell me the steps for solving 30/x=8/15 ?
many thanks

Click here to see answer by jim_thompson5910(35256) About Me 
Question 145377: can you tell me the steps for solving 30/x=8/15 ?
many thanks

Click here to see answer by josmiceli(19441) About Me 
Question 145377: can you tell me the steps for solving 30/x=8/15 ?
many thanks

Click here to see answer by ankor@dixie-net.com(22740) About Me 

Question 145379: 5x-3=28
Click here to see answer by jim_thompson5910(35256) About Me 

Question 145378: 4x=18
Click here to see answer by jim_thompson5910(35256) About Me 

Question 145419: Solve 27 - 3x= 2x squared
Click here to see answer by Alan3354(69443) About Me 

Question 145429: I need the problem factored. Or simply solved for x. 4x^2+12x+36=0
Click here to see answer by stanbon(75887) About Me 

Question 145440: solve x-4/x+5 >=3
Textbook Beecher, penna and bittinger
practice problems
thank you very much

Click here to see answer by edjones(8007) About Me 

Question 145439: Solve, find the exact solution
12/3x-2 minus 5/x+4=1
Textbook Beecher, Penna & Bittinger

Click here to see answer by stanbon(75887) About Me 

Question 145457: Can anyone help? Thank you so much
Solve x squar+3x+3=0 by using the Quadratic Formula (eg. 6, I)
I use College Algebra Book ISBN-13 978-0-618-77629-0

Click here to see answer by josmiceli(19441) About Me 

Question 145465: What does it mean when you have a sum, say for instance: y=2x+10 and it asks you what the value of x is?
Test Paper Question

Click here to see answer by ankor@dixie-net.com(22740) About Me 

Question 145481: Find the equation, in standard form, with all integer coefficients, of the line perpendicular to x + 3y = 12 and passing through (9, -5).
Click here to see answer by josmiceli(19441) About Me 

Question 145482: Solve the system of equations using the addition (elimination) method.
If the answer is a unique solution, present it as an ordered pair: (x, y). If not, specify whether the answer is "no solution" or "infinitely many solutions.
x + 5y = 4
2x – 5y = 2

Click here to see answer by Alan3354(69443) About Me 

Question 145480: Find the equation, in slope-intercept form, of the line that passes through the points (-3, 3) and (-4, 2).
Click here to see answer by josmiceli(19441) About Me 

Question 145492: Any solutions to this problem? Thank You
Graph the following (< =means≤,less than or equal to)

-2 < =x <1

Click here to see answer by jim_thompson5910(35256) About Me 

Question 145491: I can't seem to figure out this problem, can someone please help me?
1-2/x
-----
x-4/x

Click here to see answer by jim_thompson5910(35256) About Me 

Question 145507: solve for y: 2/3y+k=j
Click here to see answer by checkley77(12844) About Me 
Question 145507: solve for y: 2/3y+k=j
Click here to see answer by jim_thompson5910(35256) About Me 

Question 145508: solve for y: 2/3y + a=a+b
Click here to see answer by vleith(2983) About Me 

Question 145412: 1. (x-3)squared=0.25
2. 9xsquared-25=0
3. 27-3x=2xsquared
4. write an algebraic equation for the given verbal expression:
the perimeter of a rectangle whoes width is x and whose length is three times the width.
i need help with these algebra problems
can anyone show me how to do this and with anwser provided
thanks

Click here to see answer by edjones(8007) About Me 

Question 145574: 3/4X-5=2/3X
Click here to see answer by vleith(2983) About Me 

Question 145411: would you please provide anwsers and show how is done thank you
1. (6±√32)÷3 simplify
2. (16±√56)÷20 simplified
3. 8+10x-3xsquard=0 factoring
4. 25xsquard=16 extracting square roots


Click here to see answer by edjones(8007) About Me 

Question 145721: 1700+2x/3+140/3+2x/9=
Click here to see answer by checkley77(12844) About Me 

Question 145720: 140/3+2x/3
Click here to see answer by Alan3354(69443) About Me 
Question 145720: 140/3+2x/3
Click here to see answer by checkley77(12844) About Me 

Question 145691: Complete
Write an equation that demonstrates how Da, Ra, and Ta are related.

Click here to see answer by Alan3354(69443) About Me 

Question 145760: Determine whether the given number is a solution of the given equation.
1. 35; t+17= 53
2. 36; a-19= 17
Solve using the addition principle.
1. z+9=14

Click here to see answer by nabla(475) About Me 

Question 145759: When 2 is subtracted from the numerator and 1 is added to the denominator of a positive fraction the result is 5. Find the fraction given that it lies between 7 and 8.
Click here to see answer by ankor@dixie-net.com(22740) About Me 

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