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

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Question 926416:
The solution set of equation + = 126 is:
(a.) (1, 2) (b.) (-1, 2) (c.) (1, -2) (d.) (-1, -2)
Click here to see answer by Alan3354(69443)

Question 926514: solve the systems of quadratic equations. State the solutions
y= -3x^2-2x-54
y= -6-4x^2

Click here to see answer by Alan3354(69443)

Question 926761: Suppose that your long lost relative recently left you an inheritance of $300,000. You decide to invest the
money into an account:
You receive monthly payments while it earns 3.25% compounded monthly. If you
want the payments to last for 40 years, how much should your payments be each month?

Thanks
Click here to see answer by Theo(13342)

Question 926852: Factorise y^2 - 169
I couldn't find an appropriate topic.
Thanks
Click here to see answer by josmiceli(19441)

Question 926897: 7/w+1=-8

Click here to see answer by ewatrrr(24785)

Question 926897: 7/w+1=-8

Click here to see answer by TimothyLamb(4379)

Question 926909: (3x^2+16x+16)/(x+3)
I know that you can split the factors up but I still don't get how you can put x+3 as a common denominator
Click here to see answer by Fombitz(32388)

Question 926903: For the graph shown, select the statement that best represents the given system of equations.
algebra unit 8 lesson 1 assessment question 4
2y � 3x = 9
4y + 3x = 12

A.
consistent and independent

B.
inconsistent

C.
coincident

D.
not enough information

Click here to see answer by TimothyLamb(4379)

Question 926981: How do you graph this linear equation?
4y-2x=0
I tried using the mx+b method and it didn't work, so what should I do?

Click here to see answer by Alan3354(69443)

Question 926983: How do you graph this linear equation?
4y-2x=0
I tried using the mx+b method and it didn't work, so what should I do?

Click here to see answer by Alan3354(69443)

Question 927091: What is the x intercept of 6x + 11y = 54
Click here to see answer by TimothyLamb(4379)

Question 927118: the sum of two numbers is 11 and their difference is 6. find the number

Click here to see answer by MathLover1(20850)

Question 927119: the length of a rectangular photo is 2 inches greater than width. the perimeter is 20 inches. find the length and width?

Click here to see answer by Jolliano(16)

Question 927120: the width of a rectangular lot is 75% of its length. if the perimeter is 700 meter, then what are the length and width?
Click here to see answer by EMStelley(208)

Question 927257: Hello, I want to know if you guys can please explain me how to solve an equation using substitution and elimination. For example, how do I solve:
x-5y=-31
x+20y=-151
Using both substitution and elimination?
Thank you.
Click here to see answer by Alan3354(69443)

Question 927330: 21x + 6x - 5

Click here to see answer by Alan3354(69443)

Question 927475: 12x+15y=36 and 7x-12y=187
Click here to see answer by TimothyLamb(4379)

Question 927490: 30y + 2 = 68
y= -
Click here to see answer by ewatrrr(24785)

Question 927554: How do I find X and Y by using substitution?
2x + y = 0
x - 3y = -7
Click here to see answer by Techpriest(29)

Question 927727: your rental cost for a building is 800.00 per month and ingrediants for your product is 20n. How many cake products would you have to make to break even?

Click here to see answer by Alan3354(69443)

Question 928003: Elimination method
6x-y=27
7y=6x-81
Click here to see answer by stanbon(75887)

Question 928003: Elimination method
6x-y=27
7y=6x-81
Click here to see answer by jim_thompson5910(35256)

Question 927990: need intercepting points for these two equations: f(x)=-2/315x^2+630 and 4/3x+420
thnx!
Click here to see answer by stanbon(75887)

Question 928038: how do I solve x+3y=6 and 2x+3y=18 by the substitution method
Click here to see answer by TimothyLamb(4379)

Question 928038: how do I solve x+3y=6 and 2x+3y=18 by the substitution method
Click here to see answer by MathTherapy(10552)

Question 928136: Dy/dx=(x+y+1)^2
Click here to see answer by MathLover1(20850)

Question 928190:
Click here to see answer by TimothyLamb(4379)

Question 928506: how to solve x+y=-7 if y=x+1
Click here to see answer by stanbon(75887)

Question 928610: Determine the intercepts for the equation. (Hint: The intercepts are two points. Give both ordered pairs as
your solution.) Then use the intercepts to Graph the line.
4x � 2y = 8
Click here to see answer by TimothyLamb(4379)

Question 928706: Could you please help me solve this problem?
Solving for x
11X-2y=-13
this is what I did.
11x-2y=-13
11x-2y+2y=-13+2y
11x=-13+2y
this is were I stop and got confused.
Thanks

I tried to
Click here to see answer by ewatrrr(24785)

Question 928673: Teacher is throwing a party for students using $136. She plans on buying 5 Pizzas and 40 Drinks.
Previously it cost her 22.80 for 1 Pizza and 6 Drinks.
What do the 2 variables represent.
Write a system of equations to represent the model
What is the cost of 1 Drink.? What is the cost of 1 Pizza?
Click here to see answer by Hawksfan(61)

Question 928768: Please I would appreciate anyone's help. I am stuck on this problem.
Solve by elimination or substitution. For all three variables a, b and c. Use all three equations.
5a-5b+5c=25
-4a+4b-2c=-12
-a+ b-5c=-21
Click here to see answer by TimothyLamb(4379)

Question 928790: Solve the system:
x+4y=−8
3x+12y=−24.
If the system has infinitely many solutions, express your answer in the form x=x and y as a function of x
(I have already figured out that the system has infinitely many solutions, and mainly need assistance with writing y as a function of x).
Click here to see answer by ewatrrr(24785)

Question 928793: Please I would appreciate anyone's help. I am stuck on this problem.
Solve by elimination or substitution. For all three variables a, b and c. Use all three equations.
5a-5b+5c=25
-4a+4b-2c=-12
-a+ b-5c=-21
Click here to see answer by ewatrrr(24785)

Question 928439: solve the system of equations
2x+4y-2z=0
3x+5y =1
Click here to see answer by Fombitz(32388)

Question 929146: how do you solve for an ordered pair
3x+2y=1
5x-2y=39
Click here to see answer by Alan3354(69443)

Question 929152: Y=4 when x=-10 what's y when x=35

Click here to see answer by Alan3354(69443)

Question 929178: explain Please:
if x can be a real number y=
6x+3y=4
4-3y=6x
express as an ordered pair(x,____)
Click here to see answer by josgarithmetic(39617)

Question 929183: explain Please:
if x can be a real number y=
6x+3y=4
4-3y=6x
express as an ordered pair(x,____)
Click here to see answer by josgarithmetic(39617)

Question 929188: explain Please:
if x can be a real number y=
EQUATION 1
6x+3y=4
EQUATION 2
4-3y=6x
express as an ordered pair(x,____)
Click here to see answer by josgarithmetic(39617)

Question 929186: explain Please:
if x can be a real number y=
EQUATION 1
6x+3y=4
EQUATION 2
4-3y=6x
express as an ordered pair(x,____)

Click here to see answer by josgarithmetic(39617)

Question 929186: explain Please:
if x can be a real number y=
EQUATION 1
6x+3y=4
EQUATION 2
4-3y=6x
express as an ordered pair(x,____)

Click here to see answer by MathLover1(20850)

Question 929228: I need help with this one question is there anyone out there that is willing to help me?
The sum of the digits of a certain two-digit number is 12. Reversing its digits decreases the number by 18. What is the number...
Please us elimination of substitution. If not that's okay. Please show me your work:)
Click here to see answer by MathLover1(20850)

Question 929610: Is y=-6x+8 linear?
Click here to see answer by ewatrrr(24785)

Question 930321: will someone please help me use the table of values for the equation 6x-3y=12 for math!?

Click here to see answer by ewatrrr(24785)

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