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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 696764: what is the value of x and y if the equation is 132+6x-4y+3x+4y-3x+6y=360
Click here to see answer by MathLover1(20850)

Question 696931: algebraically an ordered pair is a solution to a system of two linear inequalities if and only if it what?

Click here to see answer by MathLover1(20850)

Question 697092: 1^5x + 2^5 > -3^5x -1^25 what is the solution set? Could you please explain all steps especially the last step?
Click here to see answer by Alan3354(69443)

Question 697020: which of the following could be the equation of a line thats parallel to 18x-72y+90=0 and passing through the mid point b/w (-14,10) and (10,-2) ?
a)4x-16y+48=0
b)x-4y+18=0
c)-3x+12y+36=0
d)-7x+28y-122=0
Click here to see answer by lwsshak3(11628)

Question 697123: (x-6)+6=7
Click here to see answer by mathbird(71)

Question 695703: find the values of x and y for which 2y+5= x-1 and y-2=3x is true
Click here to see answer by mathbird(71)

Question 697370: Find the missing values that solve this equation. 2x+y = 6 (2,____) (0,____) (1,____)
Click here to see answer by lynnlo(4176)

Question 697374: y = 3x (0, ____) (-1,____) (7,____)
Click here to see answer by Alan3354(69443)

Question 697371: y = 5 -4x (5, ____) (1, ____) (-1, ____)
Click here to see answer by Alan3354(69443)

Question 697378: y = -x +3
Click here to see answer by jim_thompson5910(35256)

Question 697448: 9) A flat rectangular piece of aluminum has a perimeter of 60 inches. The
length is 14 inches longer than the width. Find the width...

can u show all steps of work so I can understand better and how to check please?
Click here to see answer by MathLover1(20850)

Question 697451: A contractor rented a sander for 5 h and a polisher for 5h for $50. For another job, she rented the sander for 4 h and the polisher for 8 h. The rental fees for that job totalled $56. Find the hourly rate charged for each tool.
Click here to see answer by mananth(16946)

Question 697463: choose the number solution to the following systems of equations.
x+9y=9
3x-15y=-5
Click here to see answer by MathLover1(20850)

Question 697465: x2+2x=48 .. solve for x and choose the smaller answer
Click here to see answer by Prinssica(2)

Question 697465: x2+2x=48 .. solve for x and choose the smaller answer
Click here to see answer by MathTherapy(10552)

Question 697464: A chemist needs 130ml of 39% solution but has only 3% and 55% solutions available. How many militers of 3% solution should be used to get the desired solutin?
Click here to see answer by mananth(16946)

Question 697527: please help me to solve this: which value of b will make the system y=x-1 and y=4x-b intersect at the point (4,3)?
Click here to see answer by Alan3354(69443)

Question 697571: Is the ordered pair (3,-4) a solution to: 5x-2y=17?
Is the ordered pair (-2,8) a solution to: y-9=3x?
Is the ordered pair (-1,3) a solution to: -3x+4y=15?
Is the ordered pair (1,-2) a solution to: -5x-3y=1?
Is the ordered pair (-2,7) a solution to: 2y+6x=2?
Is the ordered pair (4,6) a solution to: 2y+6x=2?
Is the ordered pair (9,-3) a solution to: 4y-3x=45?
Is the ordered pair (-7,2) a solution to: 19+2x=2y?

HELP!!! i wasnt here the day we learned this in class and now i have homework and i need to show work so PLEASE HURRY!!! i am doing a year up course in math so it is complicated (for me)and i am desperate for help! SHOW WORK PLEASE!!!
Click here to see answer by lynnlo(4176)

Question 697626: Please help me solve this equation: A risograph machine can finish 100 pages in 1 minute. How many books of 250 pages can the machine copy in 20 minutes ?
Click here to see answer by josmiceli(19441)

Question 697616: x+y+3z+2w=13
x-2y+2z+w=8
3x+y+z-2w=1
Click here to see answer by Alan3354(69443)

Question 697684: I need help finding the real-number solutions for please and thank you
Click here to see answer by Alan3354(69443)

Question 697850: The linear system 6x + 5y =10 and 2x +2y =b has an infinite number of solutions
Determine the values of a and b
Click here to see answer by stanbon(75887)

Question 697954: I have to write an equation in standard form of the line that passes through the two points:
(-3, -3),(7,2)
Thank you!!!
Click here to see answer by Alan3354(69443)

Question 697956: I have to write an equation in standard form of the line that passes through the two points:
(4,-7),(5,-1)
thanks :)
Click here to see answer by Alan3354(69443)

Question 697955: I have to write an equation in standard form of the line that passes through the two points:
(9,-2), (-3,2)
I cant figure it out at all.
thank you for helping me
Click here to see answer by Alan3354(69443)

Question 698139: solve the system of linear equations using the elimination method.
x-2y=12
4x+2y=8
Click here to see answer by unlockmath(1688)

Question 698139: solve the system of linear equations using the elimination method.
x-2y=12
4x+2y=8
Click here to see answer by Stitch(470)

Question 698142: Hi! I usually get very confused when it comes to linear graphs and so I remember how to do them for a while but then I always forget! Please may you teach me how to plot linear graphs. This is the one I have in my practice exam paper:
Plot y= x/2 -1. I have almost mastered it but I would still need help when it came to plotting other graphs if they looked as hard as this. Thanks so much!
Click here to see answer by solver91311(24713)

Question 698168: how do i answer this? using substitution elimination
y+3x=6
y=2x+1
Click here to see answer by Alan3354(69443)

Question 698280: 6x+5y=150
9x+10y=270
Explain to me how to do this, using the Substitution method
Click here to see answer by MathLover1(20850)

Question 698428: y = 3x-2

Click here to see answer by jim_thompson5910(35256)

Question 698424: y = 3x-2

Click here to see answer by jim_thompson5910(35256)

Question 698107: Given that x and y are real numbers satisfying the equations 3x−2y=21 and 7x+3y=95, what is the value of x+y?
Click here to see answer by sofiyac(983)

Question 698593: the manager of a fish store has water that is 10% salt and water that is 25% salt. he needs 5 gallons of water that is 20% salt.
a)write a system of linear equations that you can use to determine how many gallons of each type of salt water the manager should combine. define your variables.
b)solve the system and determine how many gallons of each type of salt water the manager should combine and show your work.
Here's what I've got so far:
x = 10% salt
y = 25% salt
System of equations:
x + y = 5
.10x + .25y = (.20 x 5 = 1)
Solving:
-10x + (-10y)= -50
(.10x + .25y = 1)100 = 10x + 25y = 100
-----------------
0x + 15y = 50
y = 3.33
x= 5-3.33= 1.67

Click here to see answer by Alan3354(69443)

Question 698601: The perimeter of a rectangular field is 480 meters and the area is 10,800 meters squared. Find the dimensions
Can you please help me with this question? Thanks so much in advance:)
Click here to see answer by lynnlo(4176)

Question 698619: The perimeter of a rectangular field is 480 meters and the area is 10,800 meters squared. Find the dimensions.
Thanks so much in advance.:)
Click here to see answer by lynnlo(4176)

Question 698483: How do you do direct varation with this problem 2y=5x+1
Click here to see answer by MathLover1(20850)

Question 698598: The length of a rectangle field is twice the width and the area is 1800 meters squared. Find the dimensions.
Can you please help me with this question? Thanks so much in advance:)
Click here to see answer by sofiyac(983)

Question 698757: How do I determine wheter a linear relationship exists between the two quantities??
Click here to see answer by Alan3354(69443)

Question 698835: Find the value of each variable and the measures of all the angles.
The problem is a figure with two lines that are shaped like an X.
The top angle is (2x) degrees.
The angle to the right of the top angle is (x+y+10) degrees.
And the angle to the left of the top angle is (4y) degrees
Click here to see answer by Simnepi(216)

Question 698891: can you help me solve substitution y=3x and y-x=4
Click here to see answer by jim_thompson5910(35256)

Question 698892: 6x+2y=18 find the slope and y intercept
Click here to see answer by Simnepi(216)

Question 698901: Solve by substitution:
x=4y-9
x=y+3
Click here to see answer by Alan3354(69443)

Question 698956: Write the equation of the line in slope-intercept form that passes through the point (3, -2) and has a slope of 2.
y = 2x - 8
y = 2x - 4
y = 2x + 7
y = 2x + 5

Click here to see answer by mananth(16946)

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