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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 938340: In a 3*3 grid, Id have put numbers from 1 to 9 so that the sum of the digits in the first row 11 , third row 18 , in the first column 21 and in the third column 17.
___ ____ ____ -11
___ ____ _____
___ ____ _____ -18
-21 - -17

Click here to see answer by josgarithmetic(39617)

Question 938312: where does x-7y=-10 and 3x-2y=8 intercept?
Click here to see answer by Fombitz(32388)

Question 938397: Solve the given system, using the substitution method.
y = 4x � 6
8x � 2y = 14
Click here to see answer by ewatrrr(24785)

Question 938470: 5y+4x=14
3y-4x=2
How to solve

Click here to see answer by ewatrrr(24785)

Question 938303: You have 180 tomatoes and 15 onions left over from your garden. You want to use these to make jars of tomato sauce and jars of salsa to sell at a farm stand. A jar of tomato sauce requires 10 tomatoes and 1 onion, and a jar of salsa requires 5 tomatoes and 1/4 onion. You'll make a profit of $2 on every tomato sauce jar sold and a profit of $1.50 on every jar of salsa sold. The farm stand wants at least 3 times as many jars of tomato sauce as jars of salsa. How many jars of each should you make to maximize profit?

Click here to see answer by mathmate(429)

Question 938571: Can you help me with algebra 1 please I need help it I due tomorrow here is the problem
M+n=23/12
M-n=17/12

Click here to see answer by algebrahouse.com(1659)

Question 938535: Hello, I am having issues with my system of equations homework. I was wondering of you could help me. I generally know how to solve them but I cannot get mine to turn out.
The system is:
x+y+z+w=6
2x+3y-w=0
-3x+4y+z+2w=4
x+2y-z+w=0
Thanks in advance! :)
Click here to see answer by mathmate(429)

Question 938884: 15y - 11 = 10y - 7 ?
Click here to see answer by stanbon(75887)

Question 938884: 15y - 11 = 10y - 7 ?
Click here to see answer by mxgirl22(39)

Question 938855: 6 plus 26 for z equals66
Click here to see answer by Alan3354(69443)

Question 938966: Solve each system by substitution.
1/2x + 1/3y = 5
1/4x + y = 10
Click here to see answer by srinivas.g(540)

Question 938968: Solve each system by substitution.
x = -1/4y + 5
3x + 2y = 0
Click here to see answer by srinivas.g(540)

Question 939111: 1.5 dogs can eat 1.5 pounds of food every 1.5 days
How may pounds of food can 16 dogs eat in 4 days?

Click here to see answer by josmiceli(19441)

Question 939300: Topic: Gauss-Jordan Elimination Method to solve linear equations (Matrices)
Problem:
-3x + 2y -6z = 6
5x + 7y -5z = 6
x + 4y -2z = 8
MY QUESTION: I am trying to set it up with excel solver. Not sure what to enter for "set objective".
Click here to see answer by MathLover1(20850)

Question 939366: Does x^2+2y=9 discribe y as a function of x
Click here to see answer by srinivas.g(540)

Question 939461: please help solve this equation
3x-7y+5(x+3y)-4(y-2x)
Click here to see answer by ewatrrr(24785)

Question 939461: please help solve this equation
3x-7y+5(x+3y)-4(y-2x)
Click here to see answer by MathLover1(20850)

Question 939459: -3x+7y=-16
-9x+5y+16
Part A: Create an equivalent system of equations by replacing one equation with the sum of that equation and a multiple of the other. Show the steps to do this.
Part B: Show that the equivalent system has the same solution as the original system of equations.
Click here to see answer by josgarithmetic(39617)

Question 939374: Summer is coming to a close in Alaska, and the temperatures are falling. The temperature in Fairbanks is -2 times the temperature in Barrow. The temperature in Barrow is 6 degrees more than -2 times the temperature in Fairbanks. What are the temperatures in Fairbanks and Barrow?
Click here to see answer by ankor@dixie-net.com(22740)

Question 939696: I have never done pre-algebra, so Algebra is really new to me. Please help me solve system of linear inequalites graphically:
x >= - 4
x >= 1
It would help if you could explain the solution, because I don't fully understand why the variable x is where I think the variable y should be. Or what the slope is. All I see is just the y-int, but I don't know the slope. It would really help if I could get an explanation. Thank you!
Click here to see answer by stanbon(75887)

Question 939729: Use the slope formula to find the value of x that passes through the given point.
(x,7);(8,11), m=4/3
Click here to see answer by lwsshak3(11628)

Question 939708: MENTAL BLOCK!
I need to come up with a scenario that shows no solution for system of Linear Equations.
Here is the question:
Write a linear system of equations that has no solution. Represent it geometrically.
Describe in words a situation that could be modeled by this system.
I can show it geometrically (graph not attached) and algebraically (1x +2y = 28 and 1x +2y = 34) but I can not for the life of me come up with a scenario.
I will show you my work for one and infinite solutions:
one solution-
15x + 7y = 55.40
12x + 10 = 61.70
Jasmine bought 15 boxes of paper clips and 7 packages of index cards for a total cost of $55.40. Lucia bought 12 boxes of paper clips and 10 packages of index cards for a total cost of $61.70. Find the cost of one box of paper clips and the cost of one package of index cards.
infinite soltions
3x -2y = 5
12x � 8y =20
Bob bought 3 apples and returned 2 boxes of rice at Slick Steve�s. Without making any other transactions he left the store. John when to Cheapskate Charlie�s and bought 12 apples and returned 8 boxes of rice and left the store with 20 dollars in his hand. Which store has the best prices?

Click here to see answer by MathLover1(20850)

Question 939688: Write a system of linear equations that has no solution. Represent it geometrically.
Describe in words a situation that could be modeled by this system.
Click here to see answer by mananth(16946)

Question 939811: speed boat took 3 hours to travel the distance of 60 km Up aRiver against the current return trip took two hours find the average speed of the boat in Stillwater and the speed of the current
Click here to see answer by ankor@dixie-net.com(22740)

Question 940055: Hello,
May you please solve the linear system of....
y=3x-6
y=-7x-1
Thanks!
Click here to see answer by etutorworld(19)

Question 940055: Hello,
May you please solve the linear system of....
y=3x-6
y=-7x-1
Thanks!
Click here to see answer by srinivas.g(540)

Question 940134: Can you help me solve this word problem
Anita is 4 � years older than Basilio. Three times Anita�s age added to six times Basilio�s
age is 36. How old are Anita and Basilio?

Click here to see answer by MathLover1(20850)

Question 940145: trying to graph and label these systems of linear equations. State whether they are consistent, inconsistent dependent. If they are consistent, give the common solution.
x-y=4
5x-3y=8
Click here to see answer by rfer(16322)

Question 940154: trying to graph and label these systems of linear equations. State whether they are consistent, inconsistent dependent. If they are consistent, give the common solution.
2x-y=2
3x+y=18
Click here to see answer by ewatrrr(24785)

Question 940173: -4x-y=-21
x-2y=12
Solve by substitution
Click here to see answer by MathLover1(20850)

Question 940474: -5X+3y=12
2X+5y=-11
Click here to see answer by Fombitz(32388)

Question 940646: state whether the lines are parallel, perpendicular, or neither.
Y = 6
X = -2
Click here to see answer by MathLover1(20850)

Question 940856: A movie theater charges $ 9 for adults and $ 6 for seniors. On a particular day when 334 people paid an admission, the total receipts were $ 2551. Round your answers to the nearest integers.
How many who paid were adults?
How many who paid were seniors?
Click here to see answer by macston(5194)

Question 337813: 1. points A, B, and C are collinear and A is between B and C.
AB= 4x -3 BC =7x + 5, and AC = 5x -16
Find each value.
a. BC
b. AB
c. AC
Please e3xplain how to solve this problem
Click here to see answer by rameens_99(10)

Question 940905: y=x+10 and x-y+12 is it: parallel,perpendicular or intersecting lines?
Click here to see answer by Alan3354(69443)

Question 940941: Hi,
I am suppose to simplify by applying the distributive property. I don't understand how to do this. Thanks.
6-(2x-8)
Click here to see answer by MathLover1(20850)

Question 940554: x + 2y greater than less than 9
Click here to see answer by Fombitz(32388)

Question 941121: Solve for the unknown variable:
4-(3/x)=6-(5/x)
How would I solve for x here? Can you walk through the steps of getting the answer! Thank you!
Click here to see answer by Alan3354(69443)

Question 941118: Solve the following equations for x and y: 3x-7y=13 and 2x+5y=-1
Click here to see answer by Fombitz(32388)

Question 941253: I cannot figure out, at all how to solve, and graph the following
8x-5y= -30
8x=5y-30
Click here to see answer by Alan3354(69443)

Question 941487: solve the equation below and show steps in work
1/3(12+x)=-8(6-x)
Click here to see answer by srinivas.g(540)

Question 941473: 4x-3y=32
Click here to see answer by Alan3354(69443)

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