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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 268347: Rewrite each equation in slope-intercept form. Then graph it.
2/3x-1/2y=2

Click here to see answer by rfer(12730)

Question 268358: ata high school basketball game, 400 tickets are sold. adult tickets cost 5 dollars and student tickets cost 2.50. if the totla amount collected was 1375 how many student tickets were sold?
Click here to see answer by rfer(12730)

Question 268214: how do i find the solution using substitution to:
15x-10y=-1
15y=-2+5x
Click here to see answer by ankor@dixie-net.com(15746)

Question 268354: the sum of the ages of petra and her mother is 53. her mother is 11 years more thean twice as old as petra. how old is petra and her mother?
Click here to see answer by rfer(12730)

Question 268762: 9x - 6y = -12
x + 2y= 0
how do you solve the system of equations by elimination
Click here to see answer by persian52(158)

Question 268761: 5x + 3y = -10
3x + 5y= -6
how do you solve the system of equations by elimination
Click here to see answer by persian52(158)

Question 268758: 7x + 4y = -4
5x + 8x = 28
how do you solve the system of equations by elimination
Click here to see answer by persian52(158)

Question 268362: Graph this equation:
x/2-y/3=1
Click here to see answer by persian52(158)

Question 268811: How do you solve:
Write an equation of a line which contains the points (4, -2) and (-1, -2).
Thank you
Click here to see answer by palanisamy(496)

Question 268805: How do you solve:
Write an equation of a line which contains the points (3, -2) and (3,6).
Thank you
Click here to see answer by Edwin McCravy(8999)

Question 268813: How do you solve:
Solve the following system graphically. Sketch the graphs and label the point of intersection. State the solution of the system.
2x-y= 4
x+3y= 9
Thank you
Click here to see answer by user_dude2008(1861)

Question 268987: how do you rearrange this problem? 2x + y + 1 = 0
x + 3y + 3 = 0

and this one to? 2x - y - 8 = 0
x + 3y + 3 = 0
Click here to see answer by drk(1908)

Question 269048: I do not even know were to start for this problem because i only know how to solve problems of two equations with two variables. I would like to know how to solve it as well as a answer for x,y, and z

x + y + z = 1
5x + 4y + 4z = 6
4x + 5y + 6z = −3
Click here to see answer by Alan3354(31518)

Question 269192: laura has $4.50 in quarters and dimes. She has 3 more dimes than quarters.How many quarters does she have?
Click here to see answer by suhasbhat(3)

Question 269247: find the intercepts of the graph of the equation
Click here to see answer by persian52(158)

Question 269471: Determine whether a system of two linear equations with (0,0) and (2,2) as solutions sometimes, always, or never has other solutions.
Click here to see answer by oberobic(2304)

Question 269393: Biking into the wind on a flat path, a bicyclist takes 5 hours to travel 30 miles. The return bike takes 3 hours. The wind speed remains constant during the trip.
a. Find the bicyclist's average speed for each leg of the trip.
b. Write a system of linear equations that represent the situation.
c. What is the bicyclist's average speed in still air? What is the speed of the wind?
Click here to see answer by josmiceli(9817)

Question 269703: I thought I new what I was doing, maybe I'm just tired. I created a system of 2 equations to find length and width and tried to substitute and solve. Please go over the steps and equations used.
A rectangular lot whose perimeter is 220 feet is fenced along three sides. An expensive fencing along the lot's length costs $20 per foot, and an inexpensive fencing along the two side widths costs only $8 per foot. The total cost of the fencing along the three sides comes to $2040. What are the lot's dimensions?
-Thank you
Click here to see answer by mananth(12270)

Question 269789: x-3y+7z+w=11
2x+4y+6z-3w=-3
3x+2y+z+2w=19
4x+y-3z+w=22
Systems of linear equations in three variables
Click here to see answer by Alan3354(31518)

Question 269835: Determine whether the system is consistent, inconsistent, or dependent.
3x + 2y = 15
6x + 4y = 30
Click here to see answer by drk(1908)

Question 269901: If 7 times a number is added to 3, the result is 2 less than 8 times the number. ( all I need is to know how to set up the equation)
Click here to see answer by drk(1908)

Question 270002: bob has 60 coins consisting of quarters and dimes. the coins combined value is $9.45. how many quarters and how many dimes are there.
Click here to see answer by Tobiasz(54)

Question 270065: IS Y= -4 A SOLUTION FOR THIS INEQUALITY 6+3Y-7> 8(3X-3) + 1
Click here to see answer by Tobiasz(54)

Question 270065: IS Y= -4 A SOLUTION FOR THIS INEQUALITY 6+3Y-7> 8(3X-3) + 1
Click here to see answer by Alan3354(31518)

Question 270355: could you please help me solve this? I have no clue at all how to do this.
Thanks
solve the system of linear equations using substitution:
y=2x
y=-4x+8
Click here to see answer by Alan3354(31518)

Question 270401: could system of equations be solved by elimanating with addition or subtraction
Click here to see answer by persian52(158)

Question 270497: Please explain this linear equation:
If x + y = 15 and x -y = -19 then xy = ?
Thanks,
Jesse Evans
jesseevans@hughes.net
Click here to see answer by vleith(2825)

Question 270497: Please explain this linear equation:
If x + y = 15 and x -y = -19 then xy = ?
Thanks,
Jesse Evans
jesseevans@hughes.net
Click here to see answer by persian52(158)

Question 270497: Please explain this linear equation:
If x + y = 15 and x -y = -19 then xy = ?
Thanks,
Jesse Evans
jesseevans@hughes.net
Click here to see answer by Alan3354(31518)

Question 270595: Write the ordered pair for f(-5) = 8 and identify the x- and y-values.
Click here to see answer by stanbon(57967)

Question 270598: What are the domain and range of each relation? Is the relation a function?
E= {(40,10),(-18,27),(38,10),(57,-15)}

Click here to see answer by stanbon(57967)

Question 270663: Write the linear equation in the form y=mxtb. identify the slope and y intercept: 2xt3y-10 my teacher's answer was :
y=mxtb
3y/3= -2xt10/3
y= -2x/3 + 10/3
m= -2/3
y= 10/3
is he correct?

Click here to see answer by Greenfinch(383)

Question 270859: solve for x and y for the following equations using elimination method:
0.5x + 2y = 9
4x - 15y = 2
Click here to see answer by JBarnum(2044)

Question 270917: Can you please help me write this as an equation?
one number is 3 more then twice another number.find the larger number if their sum is -15
I think it is written like this;
2x+3=x
Click here to see answer by ptaylor(2052)

Question 270963: word problem: there was two kids that were selling juice boxes and sandwiches at a local baseball game. They earned $730.50 that day. They sold a total of 540 items. How many juice boxes were sold and how many sandwhiches were sold.
Click here to see answer by solver91311(17077)

Question 271058: I need help with solving linear systems. I need to use the linear combinations to solve the system of linear equations. I have tried several and they are not coming out right.
3a+9b=8b-a
5a-10b=4a-9b+5
Please help me!
Click here to see answer by oberobic(2304)

Question 271088: OK, so I know the following is incorrect, so could you help me to figure out what I am doing wrong. I am trying to solve the linear equations by using linear combinations.
9X-3Z=20
3X+6Z=2
My answers were X=2 and Z= -.66 or -2/3
I would appreciate your help!

Click here to see answer by LarissaRichardson(34)

Question 270496: Please explain this linear equation:
If x + y = 15 and x -y = -19 then xy = ?
Thanks,
Jesse Evans
jesseevans@hughes.net
Click here to see answer by papugai(18)

Question 271152: If the larger of two numbers is divided by 6 and is subtracted from three times the smaller number, the result is 44. If the smaller number is increased by 4, the result is half the largest number. Find the numbers. This is so comples I do not know how to set it up. I know 3X-n/6=44 and the part +4 = 1/2n
Click here to see answer by Greenfinch(383)

Question 271186: 1 number is 4 less than 3 times another. If their sum is increased by 5, the result is 25. Find the numbers.
The numbers are 6 & 14 - how did they get 6, I can figure out 14 but missing an essential part.
Thank you.
Click here to see answer by craigt(10)

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