Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 874794: Find the slope of the line given by the equation: 6x � 9y = �72 .
Click here to see answer by ewatrrr(24785)

Question 874790: Write an equation for the line that passes through the points (12, 3) and (�3, �7).
Click here to see answer by ewatrrr(24785)

Question 874823: Hey,
I've tried solving the following 2 equations but finding it hard to complete. Are you able to help me please?
Answers either as integers, or as fractions in their simplest form
1) 13x + 4 = 5x + 20
2) 3 - 2(x - 3)= 5/2
Are you able to help me with them, be much apprenticed. Many thanks

Click here to see answer by ewatrrr(24785)

Question 874832: (8-h)^3

Click here to see answer by Alan3354(69443)

Question 874993: Solve the system by the method of your choice.
2x=y-7
2x-y=1
Click here to see answer by ewatrrr(24785)

Question 874976: z/5 - 1/2 = 2/6
Click here to see answer by jim_thompson5910(35256)

Question 874995: the sum of the digits f a two-digit number is 11.if the digits at ten's place is increased by 5 and the digit at unit place is decreased by 5,the digits of the number are found to be reversed.find the original number.
Click here to see answer by lwsshak3(11628)

Question 875151: if x=sqrt{3+2sqrt(2)} then find the value of x^2+1/x^2 and x+1/x
Click here to see answer by mananth(16946)

Question 875147: a jeweller has bars of 18 carat gold and 12 carat gold. how much of each must be melted together to obtain a bar of16 carat gold ,wieghing 120g?it is given that pure goldis 24 carat.
Click here to see answer by dkppathak(439)

Question 875246: I'm find it hard to rearrange the formula, are you able to help me please.
You should use algebra in all parts of this question, showing your working
clearly.
abc
----- = c^2 + a(b + 2)
3
to make b the subject (assuming that ac − 3a = 0 )
I might not of typed it out correct on the browser so here is a picture of the question
http://gyazo.com/101e4bb81f099c42a66288c3b5bfb6ed
Be much help thanks.
Click here to see answer by Alan3354(69443)

Question 875255: I am studying for my finals and I need help with
Consider y= -2x^2-8x+5
Express it in Vertex form, then find the vertex.
I figured part a. out, y=a(x-8)^2+5, xv= 8, yv= 5
I still need help with b.
Is the vertex a maximum or minimum point? What is its value

Click here to see answer by ewatrrr(24785)

Question 875291: What percent of 40 is 13?
Click here to see answer by ewatrrr(24785)

Question 875347: If r = -2 and s = 5, what is the value of r^2(2r + s)?
Click here to see answer by jim_thompson5910(35256)

Question 875423: I'm having trouble solving this problem for some reason. I am not understanding how to solve it.
-1/4(x-8)+1/2(x+2)=x-3
Can Someone help me on this please?
Click here to see answer by mananth(16946)

Question 875445: Factor the following: (x+y)^2-(x-y)^2
Click here to see answer by mananth(16946)

Question 875488: Hey,
I'm on a question where you have to solve the question that a student has attempted but is wrong, I can't seem to find the problem. Are you able to help me please?
Here is a picture of the students workout and question.
http://gyazo.com/df24ccae44177730e6f7a41db326a995
Be much help, thank you.
Click here to see answer by rothauserc(4718)

Question 875426: Nicki used the equation v = at + vo, where v is the velocity at time t, a is the acceleration, and vo is velocity at time 0. Given the equation, which could be used to find the acceleration of an object?
Click here to see answer by Fombitz(32388)

Question 875553: Please help me with this problem:
I am unsure if you can or cannot add numbers with exponents. If you can would the answer be something along the lines of: ?
I added and then i wasn't sure what to do about That doesn't seem right to me.
Click here to see answer by Fombitz(32388)

Question 875584: The sum of the cube of b and the square of c
Click here to see answer by Fombitz(32388)

Question 875649: If b > a > 0, which of the following is less than a / b?

A.) 2
B.) b/a
C.) 1/(a/b)
D.) a/2b
E.) (2a/b)
Click here to see answer by edjones(8007)

Question 875640: My 12 year old has this one for homework, I've seen it solved but can't explain it easily to them can you help? A mystery 2 digit number.
When 2 is subtracted from it and the result is doubled we get the same two-digit number with its digits reversed. If the sum of the two digits is 13, find the value of the two digits. TRANSLATE THE ABOVE INFORMATION TO WRITE TWO EQUATIONS THEN TRY AND LINK THE TWO EQUATIONS TO SOLVE FOR THE UNKNOWNS.

Click here to see answer by richwmiller(17219)

Question 875693: If 2x / 3 = 4 / 5 then what is the value of x?
Click here to see answer by ewatrrr(24785)

Question 875710: I'm sorry for the lack of clarity in that last question; I was quite worried I would never get an answer!! My question was if you could please solve the following equation FOR x: . It was silly of me to leave that out. Thank you for your patience and cooperation!
Click here to see answer by jim_thompson5910(35256)

Question 875708: I'm not entirely sure which category this question falls under, but nonetheless, could you please help me solve this stubborn equation: ? Muchas gracias de antemano!! (Thanks very much in advance!!)
Click here to see answer by rothauserc(4718)

Question 875842: in a group og 15 persons ,7 persons have studied German,8have studied French and 3 persons have not studied either.How many persons of these have studied both German and French?

Click here to see answer by ewatrrr(24785)

Question 876004: Determine whether the system has a common solution. Write yes or no.
y=4x+6
y=7x-8
Click here to see answer by ewatrrr(24785)

Question 876004: Determine whether the system has a common solution. Write yes or no.
y=4x+6
y=7x-8
Click here to see answer by Fombitz(32388)

Question 876036: Solve.
4a - 7 = -6a + 12
Click here to see answer by ewatrrr(24785)

Question 876023: 3/5k + 7/10 = 11/15k - 2/5
Click here to see answer by Alan3354(69443)

Question 876216: Can you solve
x^2 + y^2 = 250
x^2 - y^2 = 88
Click here to see answer by ewatrrr(24785)

Question 876217: x^2 + y^2 = 250
x^2 - y^2 = 88
Click here to see answer by ewatrrr(24785)

Question 876221: Write an equation of the line that is parallel to the given line and passes through the given point. y=x+3,(5,0)
Click here to see answer by ewatrrr(24785)

Question 876244: im sorry but i need help again on alot this time
1)Write an equation of the line that is parallel to the given line and passes through the given point. y==2x+3, (-4,1)
2)Write an equation in slope-intercept form of the line that passes through the points.(-4,2) (1,-1)
3) Write an equation in slope-intercept form of the line that passes through the points.(-2,-1) (3,5)
4)Write an equation of a line that is perpendicular to y=2x+3 and passes through
(3,4)
tats all for today ... Thank you if you can me again

Click here to see answer by mananth(16946)

Question 876310: How do I anser 4x+1=2x+12
Plz help me its maths homework that due in tommorow. I need it asap

Click here to see answer by ewatrrr(24785)

Question 876421: The camera Melissa wanted for her birthday is on sale at 38% off the usual price. the amount of the discount is $155.80. What was the original price of the camera?
Click here to see answer by jim_thompson5910(35256)

Question 876422: suppose a spacecraft recently started on a journey inside the solar system. the trip is 4.5 * 10^9 miles long and will take 7 1/2 years. How many miles will the spacecraft travel per year?
Click here to see answer by jim_thompson5910(35256)

Question 876424: Find the coordinates of the center and the length of the radius of the following circle.
(x - 5)^2 + (y + 3)^2 = 25
Click here to see answer by Alan3354(69443)

Question 876452: An inventory of two types of floodlights showed a total of 60 lights valued at $2580. If Type A cost $40 each while Type B cost $50 each, how many Type B floodlights were in inventory?
Click here to see answer by mananth(16946)

Question 876274: a man covers a distance of 24 km in 3.5 hours partly on foot at speed of 4.5 km per hour and partly on bicycle at speed of 10 km per hour.Find the distance covered on foot.
Click here to see answer by ankor@dixie-net.com(22740)

Question 876566: 2p+10=p+8
Click here to see answer by sqlimaster(2)

Question 876607: 3(2x-3)=27 what does x equal to? please tell step by step.
Click here to see answer by ewatrrr(24785)

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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, 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, 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