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

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Question 242477: at maximum speed airplan travel 2460 miles against the wind in 6 hours flying with the wind the plan can travel the same distance in 5 hours
Click here to see answer by stanbon(75887)

Question 242499: y+4=-5x
y=3x+2
Click here to see answer by philline_palana(20)

Question 242351: For spring break some students flew to cancun. From mexico city, the airplane took 2 hrs to fly 600 mi against a head wind. The return trip with the wind took 1 2/3 hr. Find the speed of the plane in still air.
Click here to see answer by checkley77(12844)

Question 242469: how would you graph and solve 3y>4x?
Click here to see answer by philline_palana(20)

Question 242671: F(3)=3x-4+7x=
Click here to see answer by rapaljer(4671)

Question 242828: solution to this linear equation 3x + 3 over 4 - 7x -6 over 2 = 1
Click here to see answer by nyc_function(2741)

Question 243010: Find an equation in slope-intercept form if possible through (-8, 1), with undefined slope
Click here to see answer by Alan3354(69443)

Question 243004: heres my question its about finding x between jupiter and Io,using the equation
x+300,000+400,000+800,000=4 3/4x

moons orbit /Io europa ganymede callisto

distance
from jupiter ? ? ? ?

can u help me with this sir/mom im having problem with this one i dont know how to find the x between those jupiter
Click here to see answer by Alan3354(69443)

Question 243361: Describe two real-life examples where linear equations are used at home. Describe them in detail.
Click here to see answer by oberobic(2304)

Question 243429: find the coordinates of the y-intercept for the given equation:y=x-13 and y=3x-7
Click here to see answer by checkley77(12844)

Question 243390: 1. One number is 40 more than another. Find the number if the sum is 48.
2. The difference between 6 times a number and 12 equals the sum of the number and thirteen. Find the number.
3. One number exceeds another by 5. If the larger is increased by 5 and the smaller decreased by 8, the larger will be 12 less than twice the smaller. Find the original number.

Click here to see answer by checkley77(12844)

Question 243514: 8y=7+3x how to make in standard form
Click here to see answer by College Student(505)

Question 243528: Solve by the elimination method.
x+3y=14
-x+7y=6
Click here to see answer by jim_thompson5910(35256)

Question 243643: find the coordinates of -x+3y=12, and 4x+3y=12
Click here to see answer by jim_thompson5910(35256)

Question 243674: without graphing, solve each equation and determine whether each system has no solution, one solution or an infinite number of solutions
5x-8y=24
10x-16y= -9
Click here to see answer by jim_thompson5910(35256)

Question 243634: solve the following system of equations
x + 7y = 6 (1)
x = 5 - 7y (2)
what is the solution of the system?
Click here to see answer by checkley77(12844)

Question 243633: Use the elimination method to find all solutions of the system of equations. (Round each answer to two decimal places.)
x^2 - y^2 = 25
2x^2 - y^2 = x + 55
Click here to see answer by checkley77(12844)

Question 243624: Use the substitution method to find all solutions of the system of equations. (Round each answer to two decimal places.)
x^2 - y = 6
2x^2 + 3y = 16
Click here to see answer by checkley77(12844)

Question 243718: how do i find out if a graph on an equation will be parallel or perpendicular if only given the points?
EX. (3,1) (5,3) is the graph of the equation parallel, perpendicular or neither?
Click here to see answer by oberobic(2304)

Question 243695: solve the following
x + 7y = 6
x = 5 - 7y
what is the solution of the system?
Click here to see answer by checkley77(12844)

Question 243662: 1.5x+3y=9
How would i graph this?
Click here to see answer by checkley77(12844)

Question 244084: graph the linear inequality x > -3
Click here to see answer by solver91311(24713)

Question 244086: graph the linear inequality y > 2
Click here to see answer by JimboP1977(311)

Question 244144: Graph the linear system. Classify the system as consistent and independent,consistent and dependent, or inconsistent. Also show the work.
-x+y=1
And
x+y=0
Click here to see answer by skadouchx18(2)

Question 244087: graph the linear inequality y > or = to 1/3x - 3
Click here to see answer by checkley77(12844)

Question 244189: My son has an assignment from a substitute that apparently did not explain the homework sheet to the students.
Question: Is the relationship shown by the data linear? If it is, model the data with an equation.
X Y
2 3
3 7
4 11
5 15
Click here to see answer by checkley77(12844)

Question 244238: How would I do y=x-6 on a graph as a linear line? Because I don't know what the rise over run is but I know the Y intercept... So how would I graph it or figure out what the x is?
Click here to see answer by checkley77(12844)

Question 244772: Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this.
5x - 2 = y
y - 5x = 1
Here is what I put as my answer not sure if I did it right
5x-2=y
+2 +2
________
5x=y+2
________
5 5
x=y+2/5
y-5(y+2/5)=1
y-5y+10/5=1
y+5-5y+10/5=1
5*4y+15/5=1
4y+15=1
-15 -15
_______
4y=-14
_______
4 4
y=3.5 (3 1/2)
x=(3 1/2+2)/5
x=5 1/2/5
x= 11/10
I have another one if you don't mind also
Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this.
-0.9x + 0.8y = 14.6
-0.3x + 0.1y = 3.7
Here is what I put as an answer
-9x+8y=146
-3x+1y=37
__________
-27x-24y=438
+27x+9y=338
____________
15y=100
________
15 15
y=6 1/3
-9x+8*19/3=146
8/1*19/3=152/3
9x+152/3=146
-152/3 -152/3
________________
-9x=286/3
__________
-9 -9
x=286/3/9
x=286/27
Please respond ASAP
Click here to see answer by MRperkins(300)

Question 244763: Solve by using elimination method.
-4x-2y=3
2x+y=1

separate problem:
2x+y=1
-x-y=-3
Click here to see answer by jim_thompson5910(35256)

Question 244750: 3x-5y=-3,-9x-15y=9 how do you solve using the elimination method?
Click here to see answer by jim_thompson5910(35256)

Question 244891: please help me solve the equation.3(x+2)-(3x+6)=0
5(2z-3)=9(z+2),8x-(3x-1)=2
Click here to see answer by Theo(13342)

Question 244872: find the equation of the line perpendicular to x-3y=7, containing the point (3,5)
Click here to see answer by Mr. Feliz(12)

Question 244928: john needs to rent a theatre for a concert. The theatre charge $700 plus $3per person. john plans to selltickets for $10 per person. let C represent the cost of the eventand N the number of people attending the concert.
Write a linear system to represent the situation.
How many tickets must be sold to break evan?
what will be the total cost be?
Click here to see answer by Theo(13342)

Question 245131: graph this equation and describe it as consistent and independent, consistent and dependent, or inconsistent
4x-2y=6
6x-3y=9

Click here to see answer by Alan3354(69443)

Question 245535: if we have this type of question x+2y<-25 so, how we are going to graph nad solve it
Click here to see answer by stanbon(75887)

Question 245535: if we have this type of question x+2y<-25 so, how we are going to graph nad solve it
Click here to see answer by edjones(8007)

Question 245599: y = x + 5
4x + y = 20
Click here to see answer by stanbon(75887)

Question 245609: y - 4x = 3
2x - 3y = 21
Click here to see answer by checkley77(12844)

Question 245675: what is a line parallel to 2y=4x-6 and passes through point (2,5)
Click here to see answer by checkley77(12844)

Question 245675: what is a line parallel to 2y=4x-6 and passes through point (2,5)
Click here to see answer by TheProdicalSon(34)

Question 245669: How do I find the x- and y-intercepts of this equation: x+2y=18
Click here to see answer by checkley77(12844)

Question 245733: y=6x-11
-2x-3y=-7
Click here to see answer by richwmiller(17219)

Question 245733: y=6x-11
-2x-3y=-7
Click here to see answer by TheProdicalSon(34)

Question 245750: Find all values of k, for which the system of equations
2x-2y+kz=0
x+4z=0
kx+y+z=0
has a nonzero solution (that is, (x,y,z) not equal to (0,0,0)
Dont know this please help
Click here to see answer by TheProdicalSon(34)

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