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

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Question 1019803: 2a+8b=22
- 2a + b = 5
help please I don't know how to get this to make sense
Click here to see answer by ikleyn(52786)

Question 1019817: Gilbert Moss & Angela Pasisc spent.....................
Click here to see answer by Alan3354(69443)

Question 1019919: Sketch the linear function f(x) = 1/2 (3x + 1) - 1. Which key feature of the graph is true?
A) y-intercept (0, -1)
B) x-intercept ( 1/6 , 0)
C) x-intercept ( 1/3 , 0)
D) y-intercept (0, 1/2 )
I am confused by this question on USATESTPREP could someone please help?
Click here to see answer by LinnW(1048)

Question 1020125: Please help me solve this problem: y=x^2-4x+10
y=2x+10
Click here to see answer by ikleyn(52786)

Question 1020271: is z=12 a solution of the equation: 17 - 1/4z = 7/6z?
Click here to see answer by Fombitz(32388)

Question 1020456: 1/2x - 1/3y - 1/2z = 1/10
1/3x - 1/4y + 1/3z = 1/8
1/4x - 1/5y + 1/4z = 1/10
Click here to see answer by Fombitz(32388)

Question 1020458: Any help will be appreciated thanks!
If (10/x)-(4/y)=2 and (10/x)+(4/y)=0, what is the value of x+y?
Click here to see answer by Fombitz(32388)

Question 1020458: Any help will be appreciated thanks!
If (10/x)-(4/y)=2 and (10/x)+(4/y)=0, what is the value of x+y?
Click here to see answer by ikleyn(52786)

Question 1020457: 1/2x - 1/3y - 1/2z = 1/10
1/3x - 1/4y + 1/3z = 1/ 8
1/4x - 1/5y + 1/4z = 1/10
Click here to see answer by Fombitz(32388)

Question 1020452: 9=10-x

Click here to see answer by ikleyn(52786)

Question 1020441: Christin Demin invested part of her P240,000 in a firm that pays 12% per annum while the rest in a company that pays 7% per annum. If by the end of a year the two investments yielded a total interest of P21,600 how much was invested at each rate?
Click here to see answer by stanbon(75887)

Question 1019644: Hello we recently learned about diophantine equations and how to use euclidean algorithm to solve it, but i am kind of really stuck!
find all solutions to each of the following Diophantine equations:
24x+63y=99

how could i use the algorithm to solve this?
Click here to see answer by Fombitz(32388)

Question 1020484: Shirabi spent $208 on a sewing machine to make purses. She spends a total of $10 on thread, fabric, and accessories for each purse and plans to charge $36 for each purse. The equation represents her break-even point, when x represents the number of purses sold.
208 + 10x = 36x
How many purses must she sell in order to break even?

Click here to see answer by Fombitz(32388)

Question 1020530: what the answer to my math problem 4x+3y=26 2x-3y=-14

Click here to see answer by ewatrrr(24785)

Question 1020758: Find the gradient of a line which is perpendicular to line y = -2x + 1
Explanation please. Thanks
Click here to see answer by Cromlix(4381)

Question 1020815: Solving systems by equations.
Y=x-2
Y=4x+1
Click here to see answer by ewatrrr(24785)

Question 1020891: How many pounds of nuts selling for $6 per lb and raisins selling for $3 per lb should a person combine to obtain 60 lb of a trail mix selling for $4 per lb?
Click here to see answer by josmiceli(19441)

Question 1021080:
A rectangular tank that is 20 feet by 15 feet and is 10 foot deep has how many cubic inches of volume. Remember to convert to cubic inches. Do not add units to your answer just the number.

Click here to see answer by Boreal(15235)

Question 1021118: Hi if anyone can help me with one problem with my math hw, that would be great! The question is:
The temperature of the soil is 30 degrees Celsius at the surface and decreases by 0.03 degrees Celsius for each centimeter below the surface. Express temperature T, in degrees Celsius, as a function of depth d, in centimeters, below the surface. Enter your answer as an equation with T on the left side, and an expression involving d on the right.
I tried these equations, but none of them seem correct.
d(t)=30+0.03
30t+0.03d
Click here to see answer by josgarithmetic(39617)

Question 1021079: Find the equilibrium point for the demand and supply function D(p) =87-8p and S(p) =48+5p
Click here to see answer by robertb(5830)

Question 1021207: Change each equation into slope- intercept form x+y=8
Click here to see answer by Fombitz(32388)

Question 1021270: Clara and her friends are planning a trip to paintball park. Find the cost of lunch and the cost of each paintball. What would be the cost for 400 paintballs and lunch? $25 for 500 & $16 for 200
Click here to see answer by stanbon(75887)

Question 1021368: What method do i have to use to solve this question?
I'm really stuck.

Find the values of h and p for which the simultaneous equations x+3y=h and 5x-(p-2)y=15 have infinitely many solutions.

Click here to see answer by robertb(5830)

Question 1021248: a company produces boxes of DVD's at a rate of 52 boxes per hour. They begin to produce boxes when they first open for the day and after three hours have 404 boxes in stock.
how many boxes were in stock when they opened?
Click here to see answer by Fombitz(32388)

Question 1021827: Find the value/s of 'a' such that the following simultaneous equations have infinitely many solutions.
ax+3y=0
2x+(a+1)y=0
I got 2 and -3 for the value of a, am i correct?
Click here to see answer by robertb(5830)

Question 1021808: Find the value/s of a such that the following simultaneous equations have infinitely many solutions.
ax+3y=0
2x+(a+1)y=0
I got 2 and -3 for the value of a, am i correct?
Click here to see answer by Fombitz(32388)

Question 1022047: Is (6, 3) a solution to this system of equations?
16x + 19y = 17
20x + y = 1

Click here to see answer by Fombitz(32388)

Question 1022047: Is (6, 3) a solution to this system of equations?
16x + 19y = 17
20x + y = 1

Click here to see answer by Timnewman(323)

Question 1022032: A manufacturer produces 17 and 24 inch computer monitors. Past sales experience shows that at least twice as many 17 inch monitors are sold as 24 inch monitors. The manufacturing plant is capable of producing 12 monitors per day. A profit of $50 is earned on each 17 inch monitor sold and $70 is earned on each 24 inch monitor sold. How many of each monitor should be produced to maximize the manufacturers profits and satisfy the constraints. What is the maximum profit?
Click here to see answer by Fombitz(32388)

Question 1022133: 6x^2 + 6y^2 = xxxx6 + yxyx6
Click here to see answer by Fombitz(32388)

Question 1022161: Solve by system graphically. .
2y= 3x+5
X=y=5

Click here to see answer by Fombitz(32388)

Question 1021868: Q) Consider the system of linear equations
x + 3y = 5
2x + ay = b where a and b are real numbers

(a) Write out the augmented matrix for this system of linear equations.
(b) Use elementary row operations to reduce the augmented matrix to row-echelon form.
(c) Determine for what values of a and b does the system have infinitely many solutions.
(d) Determine for what values of a and b does the system have no solution.
(e) Determine for what values of a and b does the system have an unique solution.

Click here to see answer by rothauserc(4718)

Question 1022364: Y=3x+1 and y=x2-3x-6 solve
Click here to see answer by Alan3354(69443)

Question 1022448: after a 20% discount ,you purchase a television for 240.what wasthe televisions price before the reduction?define a variable,create an equation, solve using algebra,and answers in a sentence
Click here to see answer by Theo(13342)

Question 1022479: Find the values of x and y that satisfy 3x − 1 + 2y = 0 and 3x2 - y2 + 4 = 0. Use the algebraic method to find the solution, and then use the graphing method to confirm whether the system of equations has real roots.
Click here to see answer by Edwin McCravy(20056)

Question 1022732: a bag contains 160 coins, there are coins of 10 and 25 cents. find the number of coin of 25 cents, if there is $26.80 in total
Click here to see answer by fractalier(6550)

Question 1022952: 3x+y+z=0
X+Y+Z=0

Click here to see answer by ikleyn(52786)

Question 1022981: 3y=x squared -9
Click here to see answer by fractalier(6550)

Question 1022981: 3y=x squared -9
Click here to see answer by stanbon(75887)

Question 1023241: Archaeologists find pottery fragments and shell beads at an ancient site. There are 87 objects in all. There are 65 more pottery fragments than shell beads. What system of linear equations will represent this scenario?
Click here to see answer by ikleyn(52786)

Question 1023240: A baseball coach ordered uniforms for her varsity and JV teams. She ordered one uniform for each player on the team. Each varsity uniform cost $57. Each junior varsity uniform cost $51. She spent $234 more on varsity uniforms than on her JV team uniforms. She ordered 42 uniforms in all. What system of linear equations will represent this scenario?
Click here to see answer by josgarithmetic(39617)

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