Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 69548: 3y divided by 4 minus y didided by 3 = -5
Click here to see answer by funmath(2925)

Question 69547: 4x + 5 divided by6 Minus x+7 divided by 4 = 2
Click here to see answer by funmath(2925)

Question 69590: 2(x+5)-x-4=7
Click here to see answer by bucky(2189)

Question 69475: Solve by completing the square:
x^2 + 2x - 8 = 0
Multiple choice:
a)-4, -2
b)-4, 2
c)4, -2
d)4,2
Thank you for helping!
Click here to see answer by ankor@dixie-net.com(15660)

Question 68811: Solve for x. I did the following.
20 (2)=5*x-2
40=5x(-2)
40=-10
x=4
I believe I did it wrong but I am not for sure. Thank you in advance.
Click here to see answer by vodyq(1)

Question 69644: How can you do this?
-k = 5
Click here to see answer by checkley75(3666)

Question 69634: I have tried figuring out these problems, but I am so lost. Can you please help me solve the following problems? Thank you.
(a) 7x + 3 > 9x - 5
(b) 5x - 5 < - (sign for less than or equal to)2x + 10
(c) A copper conducting wire measures 84 centimeters in length. It is cut into two pieces. The shorter piece is 5 centimeters shorter than the long piece. Find the length of each piece.
(d) Find the area of a circular flower bed whose diameter is 6 meters. Use ``~ = 3.14 as an approximate value.
Click here to see answer by stanbon(57387)

Question 69648: 6A. in the solution to the equation -10 + 3x = 5 shown below, some of the steps are left out.
-10 + 3x = 5
3x = 15
X = 5

Describe the steps that transform the original equation into the second equation and the second equation into the third (solution).
Click here to see answer by checkley75(3666)

Question 69651: 14. Solve each equation using the method of your choice. Then use a different method to verify your solution.
A. 14x = 63
B. -4.5x = 18.6
C. 8 = 6 + 3x
D. 5 (x-7) = 29
E. 3 (x-5) +8 =12
Click here to see answer by checkley75(3666)

Question 69650: 10. Tell what number, if multiplied by the given number, gives 1.
A. 12
B. 1 over 6
C. 0.02
D. – 1 over 2
Click here to see answer by stanbon(57387)

Question 69686:
Click here to see answer by funmath(2925)

Question 69687: My child has a maths question in Foundation of Mathematics by A J Sadler and the answer in the book = 50. I do not get that answer but my child can using calculator equations. My child needs to understand the method and I do not know where I'm going wrong. I can normally work these problem out but I need help with this one:
1/R = 1/R1 + 1/R2 + 1/R3 where R = 20, R2 = 40 and R3 = 200
1/20 = 1/R1 + 1/40 + 1/200

Click here to see answer by stanbon(57387)

Question 69698: Analyzing Linear Equations:
Write each equation in standard form?
y-13=4(x-2)
Click here to see answer by checkley75(3666)

Question 63135: R2 multiplied by 7R = 6396
Find R so that the product will be correct.
Click here to see answer by terbear1963(43)

Question 69714: solve for a: p=a+b+c
Click here to see answer by checkley75(3666)

Question 69713: x=1/2y-3
Click here to see answer by checkley75(3666)

Question 69731: In a town election, the winning candidate had 220 more votes
than the loser. If 810 votes were cast in all, how many votes did each candidate
receive?
Click here to see answer by Nate(3500)

Question 69595: hi im having trouble on this problem 24=4(h divided by 2-7 could you please help me in getting the answer and explaining ?

i tried the problem by trying to get rid of 24 by dividing by four and putting a one by the h to make it work but i am totally confused
thanks
Click here to see answer by checkley75(3666)

Question 69763: an empty bucket is put under 2 faucets. if one faucet is turned on alone, the bucket fills in 6 minutes. if the other faucet is turned on alone, the bucket fills in 4 minutes. if both are turned on, how many seconds will it take to fill the bucket?
we CANNOT even figure out the equation to this problem....
Click here to see answer by checkley75(3666)

Question 69778:
Click here to see answer by funmath(2925)

Question 69790: A postal clerk sold 75 stamps, some of which were 5 cents and some were 8 cents. The total amount was $4.80. How many of each stamp was sold?
Click here to see answer by checkley75(3666)

Question 69796: a mason can make a wall in 6 hours. His helper takes 9 hours. In how many hours can they make the wall together.
Click here to see answer by checkley75(3666)

Question 69816: Factor completely.

Click here to see answer by jim_thompson5910(28598)

Question 69814: I never seem to be able to set up equations from story problems. I think I have an idea about how to do it, then am usually disappointed. If I see an example, I can usually apply it to similar problems, but I rarely remember how they work for long.
Example:
The launch site for Trigon Balloon Co. is 250ft. above sea level. A hot-air balloon is launched from the site and begins to rise at a rate of 110ft/min. At the same time, another balloon, 2220 ft. above sea level begins to descend at a rate of 150 ft/min.
How long will it be until the balloons are at the same elevation?
What will their elevation be then?
I set it up this way, but it doesn't work out
250 + 110x = 2220 - 150x
Click here to see answer by ankor@dixie-net.com(15660)

Question 69824: Are the following lines parallel, perpendicular, or neither?
L1 with equation x – 4y = 12
L2 with equation 4x + y = 4
(A) Perpendicular
(B) Neither
(C) Parallel

Click here to see answer by tutorcecilia(2152)

Question 69887: Solve:
(x + 2)^2 = 7
My answers are:
a) 2 plus minus sqrt7
b) plus minus 47
c) -2 plus minus sqrt7
d) plus minus sqrt 47
I do not understand how they end up with roots? Thank you for the help on this one!
Click here to see answer by ptaylor(2048)

Question 69891: Solve by completing the square:
x^2 - 16x + 63 = 0
I have four answers:
a) -7, 9
b) 7,9
C) 7, -9
D) -7, -9
When I plug in these answers, I do not come up with zero, am I doing something wrong? Thank you for your help!
Click here to see answer by ptaylor(2048)

Question 69893: Solve: (x-5)^2 = 7
Do I use the foil method on this? Thank you!
Click here to see answer by tutorcecilia(2152)

Question 69823: Write the equation of the line which has y-intercept (0, 5) and is perpendicular to the line with equation y = –3x + 1.
(A) y = – x + 5
(B) y = 3x + 5
(C) y = –3x + 5
(D) y = x + 5

Click here to see answer by ankor@dixie-net.com(15660)

Question 69880: Solve using the quadratic formula:
5x^2 + x = 3
I have four choices:
a) -1 plus minus sqrt16
------------------
5
b) -1 plus minus sqrt61
--------------------
5
c) -1 plus minus sqrt 16
---------------------
10
d) -1 plus minus sqrt 61
-------------------
10
Can anyone help me get the concept of the quadratic formula? Thank you very much!
Click here to see answer by bucky(2189)

Question 69903: I am having trouble with this extra credit word problem. Please help.
If three-eighths of a number is 72, what is one-fourth of the number
Click here to see answer by jim_thompson5910(28598)

Question 69885: Is the following trinomial a perfect square:
x^2 - 6x + 9
I do not understand what method I am to use to figure this out, can anyone help me out please? Thank you
Click here to see answer by jim_thompson5910(28598)

Question 69914: write an equation that requires the use of the addition property of equality, where 6 must be added to each side to solve the equation, and the solution is a negative number. the book say's x-6= -8..please explain the process.
Click here to see answer by ankor@dixie-net.com(15660)

Question 69954: what does the y stand for in this equation
3y+6=13
Click here to see answer by checkley75(3666)

Question 69953: 2x+x=180
solve for x
Click here to see answer by checkley75(3666)

Question 69946: If x - 10 = 35, which property of equality for real numbers justifies that x = 45. show the use of this property
Click here to see answer by ptaylor(2048)

Question 69948: 13/12 x + 1/12 x = 9x+ 1/6 + 11/12 How do I work this problem to obtain the right answer ?13 is at the top and 12 is on bottom as 1 over 2 and 1 over 6 and 11 over 12. Thanks for your help and how to work the problem.
Click here to see answer by ankor@dixie-net.com(15660)

Question 69982: Find the slope and y-intercept.
x = –7
is it:
(A) Slope: undefined; y-intercept: (0, –7)
(B) Slope: 0; y-intercept: none
(C) Slope: undefined; y-intercept: none
(D) Slope: 0; y-intercept: (0, –7)

Click here to see answer by Edwin McCravy(8909)

Question 69978: This is an extra credit problem I'm having trouble with.
A boy on being asked the age of himself and his sister replied: three years ago I was seven times as old as my sister; two years ago I was four times as old; last year I was three times as old; and this year I am two and a half times as old. What are their ages now?
Click here to see answer by ptaylor(2048)

Question 69894: Find the x intercepts
y = x^2 - 3x - 1
I do not understand how I am to find the intercepts formula, can anyone help me out on this one please, thank you!
Click here to see answer by ankor@dixie-net.com(15660)

Question 69976: Not sure how to solve this equation.
5x + 8 + 3x - x + 5 = 6x -3
Thanks
Kathy
Click here to see answer by checkley75(3666)

Question 69963: How would you find the number to Twenty-nine is 13 added to 4 times a number?
Click here to see answer by bucky(2189)

Question 70058: how do you do this equation it seems impossible to me... 9(a+4)=7a
Click here to see answer by rapaljer(4667)

Question 70058: how do you do this equation it seems impossible to me... 9(a+4)=7a
Click here to see answer by hailu(13)

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