Questions on Algebra: Equations answered by real tutors!

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Question 878745: Let (a) and (b) be two solutions of the equation X^2�x+4=0
Then b/a + a/b= ?

Click here to see answer by k007sam(3)

Question 878770: What is the LCD in 7x+3&5x-7

Click here to see answer by Alan3354(69443)

Question 878728: Karissa is having 14th party and her parents are willing for spend $150. Each guest $8 per head and Decorations cost $63. Write an equation and solve with workings

Click here to see answer by ewatrrr(24785)

Question 878874: the question says find the equation for the line that is parallel to the line with the equation of (y-5)=1/2(x+1) passing through the point (-4,-5)

Click here to see answer by josgarithmetic(39617)

Question 878909: I'm studying for my Maths exam, and I'm stuck on a pythagoras question. Can you solve an equation with only one given value? I know Pythagoras can only be used on a right angle triangle, and it is, but I've only been given the value 12.9. Just wanted to know if you can actually solve it.
Click here to see answer by KMST(5328)

Question 878946: What are the values of x in the equation x(x-6)=4(x+6)
Click here to see answer by jim_thompson5910(35256)

Question 878999: how to find a line that passes through the points (-10, -4) and (-1,2)

Click here to see answer by Alan3354(69443)

Question 879020: A cargo plane flew from the US across the Atlantic at 245 mph, and flew back to the US at 265 mph. Given that the first trip took two hours longer,how long was the return trip?
Click here to see answer by lwsshak3(11628)

Question 879185: What is the slope of the line defined by the equation y = 8?
Click here to see answer by ewatrrr(24785)

Question 879090: Determine the negative solution to this equation.
13-2(x+3)-5
Click here to see answer by ewatrrr(24785)

Question 879277: (1 - 2x)^1/3 = 4
Click here to see answer by jim_thompson5910(35256)

Question 879328: 47t-(32t-89) remove parentheses and collect like terms
Click here to see answer by jim_thompson5910(35256)

Question 879376: Simplify completely: (x/x-3 +4/x) / 1-(1/3-x)
"x over x-3 plus 4 over x OVER 1 minus 1over 3-x "
Click here to see answer by josgarithmetic(39617)

Question 879376: Simplify completely: (x/x-3 +4/x) / 1-(1/3-x)
"x over x-3 plus 4 over x OVER 1 minus 1over 3-x "
Click here to see answer by lwsshak3(11628)

Question 879376: Simplify completely: (x/x-3 +4/x) / 1-(1/3-x)
"x over x-3 plus 4 over x OVER 1 minus 1over 3-x "
Click here to see answer by MathTherapy(10552)

Question 879464: 2x + 4y = 24
y = 6x + 2 solve for x and y
Click here to see answer by Fombitz(32388)

Question 879500: Please help me solve for A in this equation:

Click here to see answer by ewatrrr(24785)

Question 879520: draw a diagram to illustrate the bulletin board

Click here to see answer by Alan3354(69443)

Question 879620: the graph has slope 2 and contains the point (-1,1)

Click here to see answer by josgarithmetic(39617)

Question 879751: Please help me solve for x in this equation:

add 4x^2 to both sides of the equation to obtain
4x^2 +9x =0
Factor out an x to obtain
x(4x+9)=0
Set each term to 0 and solve each for x
x =0 and 4x+9=0
in the equation 4x+9=0 subtract 9 on both sides of the equation to obtain
4x= -9
Divide both sides by 4
4x/4 = -9/4
x= -9/4
Therefore x=0 amd x= -9/4
Click here to see answer by BigToosie(32)

Question 879767: solve 3x-1 divided by 5 = x-2
Click here to see answer by ewatrrr(24785)

Question 879783: 1/(a+(4/b))
Click here to see answer by jim_thompson5910(35256)

Question 879704: 2x + 4 = 4x + 16
Click here to see answer by Fombitz(32388)

Question 879921: Complete the square: x^2-12x=9
Click here to see answer by josgarithmetic(39617)

Question 879935: If the operation of p # q is defined as pq� - p -q, then the value of 3#(-4) is
Click here to see answer by josgarithmetic(39617)

Question 879950: In 20 years a person will be 8/3 of his age at the moment. how old is he at the moment
Click here to see answer by ewatrrr(24785)

Question 880079: Solve the equation by making an appropriate substitution...

Click here to see answer by solver91311(24713)

Question 880112: can someone please help me??????? thank you.
Write an equation for the quadratic below in standard form. y=ax^2+bx+c. thanks show all work please.
Copy & paste the link to see the graph :

Link : > http://prntscr.com/3q0l62
Click here to see answer by josgarithmetic(39617)

Question 880014: a boat goes 16 km upstream and 24 km downstream in 6 hours. it also covers 12 km upstream and 36 km downstream in same time. find the rate of speed still in water and stream.
Click here to see answer by ankor@dixie-net.com(22740)

Question 880157: 10(x+6)=5x-6
Click here to see answer by jim_thompson5910(35256)

Question 880323: Find the following when a = -1, b = 5, c = -2/3.
7b-10
------ -1
a
Click here to see answer by jim_thompson5910(35256)

Question 880442: Please give me a detailed answer

Click here to see answer by richwmiller(17219)

Question 880444: Please give me a detailed answer
Click here to see answer by richwmiller(17219)

Question 880447: Please give a detailed answer
Click here to see answer by richwmiller(17219)

Question 880446: Please give me a detailed answer
Click here to see answer by richwmiller(17219)

Question 880445: Please give me a detailed answer
Click here to see answer by richwmiller(17219)

Question 880450: I don't understand how to find t.
9(t *16)/5 = 144
I have seen the asnwer but am really struggling to get my head around this one.
I see it as Open brackets *9
9t*144/5 =144
*5 /5 to cancel it out and *5 144.
9t*144 = 720
The working out I have seen for this doesn't multiply the t by 9 yet I thought you had to, to expand the bracket?
Click here to see answer by richwmiller(17219)

Question 880437: Please give me a detailed solution.
3.The solar wind is a stream of particles blown away from Sun during an eruption traveling at 600 km/s.
a. How much time do we have to prepare?
Click here to see answer by Alan3354(69443)

Question 880439: Please give me a detailed answer
4. There are 109 stable elements (H, He, Li, ......)
a. Place this in scientific notation. Is this sensible, why or why not, explain.
Click here to see answer by ewatrrr(24785)

Question 880438: Find an equation for the line parallel to y=5x-7 with y-intercept (0,4. Write answer in slope form
Click here to see answer by ewatrrr(24785)

Question 880411: 2x-3+2x+4+x+9=90
Click here to see answer by jim_thompson5910(35256)

Question 880434: Please give me the solution in detail
1. The average distance from Earth to Sun is 150 million kilometers.
a. Express this in scientific notation with 3 significant digits. (1 mark)
b. What is the distance in meters? (1 mark)
Click here to see answer by ewatrrr(24785)

Question 880380: It is given that y=(3^x+3^-x) / (3^x-3^-x).
Show that 3^2x =(y+1) / (y-1).
Thank you
Click here to see answer by josgarithmetic(39617)

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, 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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, 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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