Questions on Algebra: Systems of Linear Equations answered by real tutors!

Tutors Answer Your Questions about Linear-systems (FREE)

Question 177973: Solve each system by the addition method. determine whether he equations are independent, dependent, or inconsistent.
x-y=3
-6x+6y=17
Thanks!!

Click here to see answer by jim_thompson5910(35256)

Question 177951: s=ut+1/2at^2
a=
Click here to see answer by Fombitz(32388)

Question 178022: You plant a 14-inch tree that grows 4 inches per year and an 8-inch tree that grows 6 inches per year. How many years after you plain the trees will the two trees be the same height? How tall will each tree be?

Click here to see answer by HyperBrain(694)

Question 178018: 4-5x=3x-20
Click here to see answer by Mathtut(3670)

Question 178005: x + 6y = -4
3x - 4y = 10
What are x and y?
Click here to see answer by jim_thompson5910(35256)

Question 178208: Help!
Solve the system of equations.
x+y+z=4
2x+3y-z=18
3x-y+2z=-2
The -z confuses me.
Click here to see answer by Alan3354(69443)

Question 178256: Solve each system by the substitution method:
x = -3y + 2
7y + 3x
Click here to see answer by Alan3354(69443)

Question 178292: 5x + 2y = -36
x = 6 - 7y
Click here to see answer by jim_thompson5910(35256)

Question 178302: This is actually solve by elimination problem.
7r - 6s = 22
6r +7s = 31 (this is what I have (32/85,?/85) can you file in the blank for me please? Thank you for your help!
Click here to see answer by jim_thompson5910(35256)

Question 176521: We are looking for the equations used for this problem. My son missed a day of school and missed the lesson...

Click here to see answer by cartert(27)

Question 178047: I need to solve these problems they are "solving linear systems by substitution"
x+8y=13
x=12y+3
y=1-x
2x+8y=-10
x=2y+2
3x+4y=12
Click here to see answer by cartert(27)

Question 178365: Solve each system by the substitution method:
x = -3y + 2
7y = 3x
Click here to see answer by Alan3354(69443)

Question 178378: Write a system of two equations in two unknowns. Solve each system by substitution.
The width of a rectangualr painting is two- thirds of its length. If the perimeter is 60in., then what are the length and width?
Click here to see answer by nerdybill(7384)

Question 178399: 2x+y=5
2y=10-4x
solve this using substitution
Click here to see answer by jim_thompson5910(35256)

Question 177623: When you are graphing a system of linear inequalities why do you change the label on the line being graphed to an equation? ie, 3x+y>20 changes to 3x+7=20
on the graph.
Thank you for your help.
Sandy
Click here to see answer by cartert(27)

Question 178431: graph the following linear equation
y=2/3x-2
Please help!
Click here to see answer by jim_thompson5910(35256)

Question 178431: graph the following linear equation
y=2/3x-2
Please help!
Click here to see answer by cartert(27)

Question 178433: Are the following lines parallel, perpendicular, or neither?
L1 through (9,2) and (3,-8)
L2 through (-3,5) and (5,-1)
Click here to see answer by cartert(27)

Question 178432: graph the linear inequality
y>or equal to 3x-2
Click here to see answer by cartert(27)

Question 178467: Find the x and y intercepts of 7x-2y=-5, and then graph.
Click here to see answer by stanbon(75887)

Question 178469: Suzanne invested $19,800 in two mutual fund accounts. During the subsequent year, on mutual fund earned 10% and the othe earned 6%. At the end of the year, the total interest earned was $1,492.00. How much did she invest in each fund?

Click here to see answer by stanbon(75887)

Question 178468: What is the equation of the line that passes through point (0,-5) with a slope of -4?
Click here to see answer by jim_thompson5910(35256)

Question 178468: What is the equation of the line that passes through point (0,-5) with a slope of -4?
Click here to see answer by jojo14344(1513)

Question 178464: what equation represents a line that goes through (12,1) and has a slope of 1/4?
Click here to see answer by Mathtut(3670)

Question 178474: Solve the following equations
3x-4y=8
6x-2y=10
with x being 4/3 or -1
y being -1 or 4/3
Click here to see answer by Alan3354(69443)

Question 178465: A line passing through (2, -4) and (-4, y) is perpendicular to a line with slope 3/2. What is the value of y?
Click here to see answer by josmiceli(19441)

Question 178475: Graph each pair of equations on a graphing calculator using a window that shows the point of intersection. Use the intesect feature to find the solution
3x - 2y = -158
5x + 4y = 1526
Click here to see answer by cartert(27)

Question 178473: Graph each pair of equations on a graphing calculator using a window that shows the point of intersection. Use the intesect feature to find the solution
y = -3x + 51
y = 2x - 9

Click here to see answer by cartert(27)

Question 178476: which two equations represent parallel lines?
y=-9x+1
y=9x+1
y=1/9x+1
y=-9x+3
Click here to see answer by Mathtut(3670)

Question 178476: which two equations represent parallel lines?
y=-9x+1
y=9x+1
y=1/9x+1
y=-9x+3
Click here to see answer by cartert(27)

Question 178472: Graph each pair of equations on a graphing calculator using a window that shows the point of intersection. Use the intesect feature to find the solution
y = -3x + 51
y = 2x - 9

Click here to see answer by Mathtut(3670)

Question 178510: The sum of two numbers is 45. Their difference is 9. What are the numbers?
I need help with setting up this equation.
Click here to see answer by jim_thompson5910(35256)

Question 178257: Write a system of two equations in two unknowns for each problem. Solve each system by substitution.
The width of a rectangualr painting is two -thirds of its length. If the perimeter is 28ft, then what are the length and width?
Click here to see answer by ankor@dixie-net.com(22740)

Question 178486: An organization wants to sell tickets to a concert. It plans on selling 300 reserved seat tickets and 150 general admission tickets. The price of a reserved seat ticket is $2.00 more than a general admission ticket. If the organization wants to collect at least $3750.00 what is the minimum price it can charge for the reserved seat tickets?
i found that the reserved tickets will sell for $9.00 and the general tickets for $7.00 but i don't know how to make it an inequality or to graph that inequality.
Click here to see answer by stanbon(75887)

Question 178631: (7a+3)+(-a-5)=-16
Click here to see answer by Zef(4)

Question 178631: (7a+3)+(-a-5)=-16
Click here to see answer by Mathtut(3670)

Question 178560: 2y+{7[3(2y-5)-(8y-7)]+9}=
Click here to see answer by Fombitz(32388)

Question 178844: x=4
4x+ 5y=-9
Click here to see answer by Mathtut(3670)

Question 178885: A car dealership sold 650 cars in 1990 and 900 cars in 2000. Write a linear equation for cars sold. Use the equation to predict sales in 2004.
Click here to see answer by Mathtut(3670)

Question 178975: Graph x-y<=3 and x+2y>=6
Click here to see answer by stanbon(75887)

Question 179016: write an equation in point slope form and standard form of the line that passes through the given points: (3,9),(1,1)
Click here to see answer by checkley75(3666)

Question 179031: Can you please explain how to do this equation?
x=2y y=x-2
use the substitution to solve each system of equations. if the system does not have exactly one solution, state whether it has no solution or infinitely many solutions.
Click here to see answer by checkley75(3666)

Question 179040: in my math class we are solving linear equations using the subtitution method
there two problems i didnt get, this is one
x-3y=0
3x+y=7
this is the set of numbers and we have to solve for the x and y values of the number equations

Click here to see answer by jim_thompson5910(35256)

Question 179036: 3x-5y=11
x-3y=1
Click here to see answer by jim_thompson5910(35256)

Question 179034: 8x+2y=13
4x+y=11
Click here to see answer by jim_thompson5910(35256)

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