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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 137428: 4x = 8
5y = 15
How would I solve this?
Click here to see answer by sassylilmommie(4)

Question 137893: The sum of three numbers is 16. One of the numbers is 2 more than twice a second number, amd 2 less than the third number. Find the numbers.
Click here to see answer by josmiceli(9661)

Question 137979: How do you solve this system?
x + 2y-3z = -8
2x + y + 3z= 17
x - 3y + 3z = 11
Click here to see answer by stanbon(57246)

Question 137891: 3x+2y=-2
2x-3z=1
0.4x-0.5z=-2.1

Click here to see answer by ankor@dixie-net.com(15638)

Question 138128: I have a couple of questions.They are word problems dealing with planning for a dance and keeping the ticket price low.
1. Band A charges $600 to play for the evening. Band B charges $350 plus $1.25 for each ticket sold. Write a linear equation for the cost of each band. Also find the number of tickets for which the cost of the two bands will be equal.
2. A caterer charges a fixed cost for preparing dinner plus a cost for each person served. You know that the cost for 100 people will be$750 and the cost for 150 people will be $ 1050. Find the caterer's fixed cost and the cost per person served.
3.From the information above , assume that 200 people will come to the dance. Which band would you choose and the cost per ticket that you need to charge to cover expenses?
Please, please HELP!!!
Click here to see answer by ankor@dixie-net.com(15638)

Question 138352: Solving Systems of Linear Equations by Graphing
2x-y=4
x+y=5
How do I do these equations.
I don't know how to set them up to solve, or what do with them once they are solved. My book does not explain these problems at all.
Thanks
Click here to see answer by checkley77(12569)

Question 138481: Please, ia m not even sure if i am in the right area. Wont someone help me please?????
Solve the system by the elimination method of these:
1) 5x + 5y = -11
7x - 2y = 13
2) 0.3x - 0.2y = 4
0.2x + 0.5y = 1
3) 6x - 9y = 13.5
7y - 2x = -6.5
4) 0.05x + 0.25y = 11
0.15x + 0.05y = 12
On these it says "What is the solution of the system". (Type an order pair. Type an integer or a decimal. Type N if there is no solution. Type I if there are infinitely many solutions)
Will someone, anyone, please help me. I am so confused. thank you in advance to anyone that will take the time to help.
Click here to see answer by stanbon(57246)

Question 139013: x-y-z=0
x-2y-2z=3
-2x+2y-z=3
Click here to see answer by checkley77(12569)

Question 139472: How can I solve this system?
3x+4y=29
-x+2y=7
Click here to see answer by jim_thompson5910(28504)

Question 139467: Hello, I worked this problem and only got half credit.
How can I work this as a systems of equations
x^2+y^2=25
5=x+y
This is what I did
x=5-y
(y-5)^2+y^2=25
2y-y^2-25=0
Click here to see answer by checkley75(3666)

Question 139845: The saddle height on a bicycle should be 109% of the riders inside leg measurement (L). Write and equation expressing the fact that the saddle height for Brenda is 36 inches.

Here is what I can think of...
109%/1000 = 0.109
.109+L=36 or 36/109=L
Click here to see answer by rapaljer(4667)

Question 139890: x-y=-5
x=3y=3 couldyou please help me understand how to solve this problem?
Click here to see answer by stanbon(57246)

Question 139898: Can you please help me graph this equation?
2x-3y=-6

Click here to see answer by stanbon(57246)

Question 139899: Can you please tell me if this is correct? I am not very good with these. The answer I got was -6
What is the slope of the line 12x+3y=-72
Click here to see answer by stanbon(57246)

Question 139902: I am not sure if I have this correct. I did try it though. In 1992 the average price of a lot on the beach near a town on Puget Sound was $94,000. By 1999, the average price of a home was $129,000. Find a linear model for the price of such a lot on the beach, P, if t=o represents the year 1992.
Here is my answer: P=$35,000t+$94,000
Click here to see answer by edjones(7569)

Question 139903: Please help me with this. Find the slope of the line passing through the pair of points. (7, -3), (7,7)
answer: undefined slope

Click here to see answer by mtjmac(1)

Question 139904: If someone could please help me with this, I would appreciate it. Find a slope-intercept form of equation for the line that passes through the given point and has the given slope. (-6, 3), m=6

Click here to see answer by checkley77(12569)

Question 139897: Can you please help me solve this?
Find the x-and y-intercepts of 2x-7y=6
Click here to see answer by checkley77(12569)

Question 140352: 9x+4y=-17
12y=-3-3x
using substition or elimination
Click here to see answer by ptaylor(2048)

Question 140354: 9x+4y=-17
12y=-3-3x
Click here to see answer by checkley77(12569)

Question 140353: Y=3x+5
2y-6x=4
using substitution
Click here to see answer by checkley77(12569)

Question 140350: using substition
y=3x+5
2y-6x=4
Click here to see answer by checkley77(12569)

Question 140349: using substition
y=3x+5
2y-6x=4
Click here to see answer by checkley77(12569)

Question 140348: using substition
y=3x+5
2y-6x=4
Click here to see answer by checkley77(12569)

Question 140383: Find the linear equation of the line that passes through (-3,2) and (5,-7).
Click here to see answer by stanbon(57246)

Question 140422: 5x-7y=-21
14y-5x=22
using substitution or elimination
Click here to see answer by MathTutorer(13)

Question 140611: O.K. what is (9, -1) and (6 , -2) in slope intercept form?
Click here to see answer by scott8148(6628)

Question 140614: what is (12, 5) and (-4, 1)
Click here to see answer by jim_thompson5910(28504)

Question 140700: you have 250 dinners
a child's plate costs $3.50
an adult's plate costs $7.00
a total of $1347.50 was collected
how many plates [child and adult] were served?
Click here to see answer by jojo14344(1512)

Question 140768: how many solutions does the linear system 3x + 5y = 8 and 3x + 5y = 1 have?
Click here to see answer by stanbon(57246)

Question 140769: Which ordered pair is the solution of the linear system 3x + y = -1 and y = -1/2x - 7/2?
Click here to see answer by Fombitz(13828)

Question 140902: 0.05x + 0.25y=66
0.15x + 0.05y=72
Solving by elimination.
Click here to see answer by checkley77(12569)

Question 140940: I NEED YOU TO SHOW ME THE GRAPH OF Y=2X+3, AND HOW TO SHOW THE WORK FOR THIS LINEAR EQUATION
Click here to see answer by checkley77(12569)

Question 140955: Can I please get assistance with the following problem?
factor f(x) into linear factors given that k is a zero of f(x)
f(x)=x^3-6x^2-25x+150;k=5
THANK YOU!!
Click here to see answer by jim_thompson5910(28504)

Question 140990: Solve the system by the elimination method.
5x + 2y = -7
7x - 3y = 19
What is the solution to the system???
I really do not understand these how to do these? Can someone please help??
Click here to see answer by jim_thompson5910(28504)

Question 140988: Here is another one that asks is it consistent or inconsistant, or dependent or independent. Then I am supposed to match with the correct system.
Solution (9, -6)
This one I cannot even take an educated or an uneducated guess I just do not no!! HELP
Click here to see answer by jim_thompson5910(28504)

Question 140980: How do I solve this system of equations using multiplication and addition method?
a/6 + b/4=5/2
2a/3 - b/2=-2
Hope you can understand this
Click here to see answer by jojo14344(1512)

Question 140984: Can you solve this system of equations by using multiplication with the addition method?
x/2+y/5=13/10
2x-3y=-10
Click here to see answer by stanbon(57246)

Question 140983: How do I solve this system of equations by using multiplication with the addition method?
1/5(x+2y)=-2
x/4-3y/2=15/2
Click here to see answer by ankor@dixie-net.com(15638)

Question 141075: How do I solve using a system of two equations in two variables?
When a plane flies into the wind, it can travel 3000km in 6 hours. When it flies with the wind, it can travel the same distance in 5 hours. Find the rate of the plane in still air and the rate of the wind.
Click here to see answer by stanbon(57246)

Question 141077: How do I solve using a system of two equations in two variables?
With the wind, a plane flew 1400 km in 4 hours. On the return trip, the pilot was forced to land after 1 h 30 min, having traveled only 450 km. Find the rate of the plane in still air and the rate of the wind.
Click here to see answer by ankor@dixie-net.com(15638)

Question 141088: 3x+4y=17
6y-2x=-20
Im stuck.
Click here to see answer by jim_thompson5910(28504)

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