Questions on Algebra: Equations answered by real tutors!

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Question 45902: solve the system of equations
x+5y+3z=4
4y+2z=6
z=-3
Click here to see answer by Nate(3500)

Question 45901: (-1, -6)
determine if the ordered pair is a solution
3x+y=-9
2x+3y=-20
Click here to see answer by Nate(3500)

Question 45890: 2x^-4+x^-2-3=0
-16 -4x-3=0
-19=4x
19/4=x
Hi is this right? Thank you for your help. Michelle
Click here to see answer by Nate(3500)

Question 45913: use substitution method. If the system has an infinite number of solutions, use set builder notation to writh the solution
x+y=-9
x-y=14
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Question 45914: solve the system
3x-4y=-3
6x+2z=-7/2
2y-4z=4
i am stuck on all especially the fraction
Click here to see answer by Nate(3500)

Question 45884: 4y2+9=0
16+1y+9=0
y=-25
Is this correct? Thank you
Click here to see answer by Nate(3500)

Question 45883: 3x^2+13x=10
3x^2+13x-10=0
9+1+13x-10=0
13x=0
x=-13
Could you please help me? Am I even close?
Thank you, Michelle
Click here to see answer by Nate(3500)

Question 45883: 3x^2+13x=10
3x^2+13x-10=0
9+1+13x-10=0
13x=0
x=-13
Could you please help me? Am I even close?
Thank you, Michelle
Click here to see answer by Earlsdon(6287)

Question 45903: solve the system of equations
3x-4y=-3
6x+2z=-7/2
2y-4z=4
Click here to see answer by abhijitvakil(7)

Question 45986: Find the slope of any line perpendicular to the line through points (6, 3) and (7, 7).
Click here to see answer by atif.muhammad(135)

Question 45983: Write the equation of the line with x-intercept (12, 0) and y-intercept (0, 4).
Click here to see answer by atif.muhammad(135)

Question 45985: Given f(x) = –x – 4, find f(a – 3).
Click here to see answer by Earlsdon(6287)

Question 45984: Determine which two equations represent perpendicular lines.
(a) y = 5/3x – 3
(b) y = 3x – 5/3
(c) y = -1/3x + 5/3
(d) y = 1/3x

Click here to see answer by Earlsdon(6287)

Question 45976: One number is 12 more than another. The sum of the smaller number and twice the larger number is 39. Find the larger number.
Click here to see answer by mszlmb(115)

Question 45978: Lane invested $22,000, part at 8% and part at 7%. If the total interest at the end of the year is $1,710, how much did she invest at 8%?
Click here to see answer by Nate(3500)

Question 45997: factor: 8x^3 - 27y^3
Click here to see answer by Nate(3500)

Question 46001: 2/x+5 minus 5/x-5 = 13/x^2-25
Click here to see answer by Nate(3500)

Question 45995: write the equations of 2 lines that are perpendicular
Click here to see answer by fractalier(2101)

Question 46073: Please help me solve the following question. I have tried to find examples of how to solve this kind of question, but have not found what are the steps needed to do. I am not sure concerned about the right answer, but rather what are the steps to get to the correct answer. I want to know how to solve this kind of problem. Thank you.

3/3x+1 - 6x/3x-1 = -2
Solve for X
Click here to see answer by Nate(3500)

Question 46072: Please help me solve the following question. I have tried to find examples of how to solve this kind of question, but have not found what are the steps needed to do. I am not sure concerned about the right answer, but rather what are the steps to get to the correct answer. I want to know how to solve this kind of problem. Thank you.

3/3x+1 - 6x/3z-1 = -2
Solve for X
Click here to see answer by Nate(3500)

Question 46045: Factor completely: 16x^3-2y^3
Click here to see answer by Nate(3500)

Question 46154: Factor completely. 12x3 – 3xy2
A) 3x(2x + y)(2x – y) C) 3x(4x – y)(x + y)
B) 3x(2x – y)2 D) 12x(x – 3y)(x – y)

Click here to see answer by Earlsdon(6287)

Question 46185: 12. Find the axis of symmetry.
y = x2 – x + 10

Click here to see answer by Earlsdon(6287)

Question 46180: 28. Factor completely. 21x2 + 33x + 12

Click here to see answer by checkley71(8403)

Question 46179: 6x + 4(3x – 2) = 6x + 2
Click here to see answer by checkley71(8403)

Question 46178: Factor completely. 10x2 + 10x – 200

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Question 46178: Factor completely. 10x2 + 10x – 200

Click here to see answer by monica17(5)

Question 46132: Solve. 7x + 7 = 6x

Click here to see answer by checkley71(8403)

Question 46226: write standard form of equation where slope of passes through points.
m=2, p(1,3)
Click here to see answer by venugopalramana(3286)

Question 46222: PROBLEM 7 i got wrong Factor completely. b2 – ab – 6a2

Click here to see answer by venugopalramana(3286)

Question 46216:
Click here to see answer by mszlmb(115)

Question 46214:
Click here to see answer by longjonsilver(2297)

Question 46253: Problem 25 I got wrong.Thank You!!

Click here to see answer by AnlytcPhil(1276)

Question 46254: 37. Solve by using the quadratic formula. x2 – 8x – 9 = 0
Click here to see answer by venugopalramana(3286)

Question 46250: 9. Factor completely. 5a2 – 125
A) 5(a – 5)2 B) 5a(a – 25) C) (5a – 1)(a – 125) D) 5(a + 5)(a – 5)
Click here to see answer by venugopalramana(3286)

Question 46256: 31. Rewrite the equation –8x – 5y = –45 as a function of x.

Click here to see answer by tutorcecilia(2152)

Question 46341: what is -8=-4/y when solving for y?
Click here to see answer by Nate(3500)

Question 46357: 13. Factor completely. x2 – 3x – 18
A) (x + 3)(x + 6) B) (x + 1)(x – 18) C) (x + 3)(x – 6) D) (x – 3)(x + 6)

Click here to see answer by Nate(3500)

Question 46353:
Click here to see answer by Nate(3500)

Question 46361: book 31 i got this equation wrong. Rewrite the equation –8x – 5y = –45 as a function of x.
Click here to see answer by mszlmb(115)

Question 46383: Multiply.

(x - 1/3) (x + 1/3)
Click here to see answer by askmemath(368)

Question 46418: solve a number ifs halved and the outcome then increased by nine. The result is 63. What is the original number?
Click here to see answer by saltzy57(8)

Question 46419: solve find the slope and y-intercept 3x+7y-4?
Click here to see answer by saltzy57(8)

Question 46393: Solve. 6x + 4(3x – 2) = 6x + 2
Click here to see answer by tutorcecilia(2152)

Question 46424: solve using positive exponents (-4x to third power y to fifth power)(-2x to fourth power y to seventh power)
Click here to see answer by tutorcecilia(2152)

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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, 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