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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 326139: Is (1, -3) a solution of this system?
3x-2y=9
4x+y=1
Click here to see answer by Alan3354(69443)

Question 326315: the sum of two integers is 51 . the larger integer is 3 more than twice the smaller integer.find the two numbers...

Click here to see answer by jim_thompson5910(35256)

Question 326411: how would I solve this system of equations:
7x+3y=12
3x+7y=6
I have the solution but could you write out the solution in full with details please?
Click here to see answer by Fombitz(32388)

Question 326820:

This was a division problem already flipped perform

indicated operations and reduce to lowest terms
Click here to see answer by JBarnum(2146)

Question 326827: Having problems solving for x and y on this one. Please help?
Solving by subsitution, either independent, dependent, or inconsistent?
y = -3x + 19 and y = 2x -1
Click here to see answer by tinbar(133)

Question 326857: After leaving a fulfilling career is a math teacher, Phil decides to venture out into the world of DVD sales. The cost of producing x DVD�s is given by the function C(x) = 1.3x + 275. The DVD�s can be sold on E-bay for $10 each.
(a) What are the fixed costs?
(b) Find the revenue and profit functions.
(c) Find the break-even point.
(d) If Phil manages to sell 500 DVD�s per month, what will his yearly profit be?

Click here to see answer by jessica43(140)

Question 327083: Solve with the elimination method
4x + y = 25
3x - y = 20

Click here to see answer by Fombitz(32388)

Question 327101: Which graph has the same intercepts as the equation: 18x - 24y = 72?
Click here to see answer by Fombitz(32388)

Question 326124: 2x+y=6 x-y=6
2x=6 x-6
1x=
Click here to see answer by zoey10123(1)

Question 327213: Solve by the addition method.
x-y=15
x+y=7
Click here to see answer by Fombitz(32388)

Question 327203: find an equation in standard form of the line:
a. through (2,-2) and (4,4)
b. perpendicular to y=x+5 and through (0,8)
Click here to see answer by Fombitz(32388)

Question 327214: Solve by the addition method:
3x-2y=-1
5x+2y=9
Click here to see answer by Alan3354(69443)

Question 327216: Solve by the addition method:
6x-2y=2
9x-3y=3
Click here to see answer by Alan3354(69443)

Question 327236: solve
4X + Y = 22 , 2X + 3Y = 16

Click here to see answer by Fombitz(32388)

Question 327298: *Determine how many solutions exist
*Use either elimination or substitution to find the solutions (if any)
*Graph the two lines, labeling the x-intercepts, y-intercepts, and points of intersection
y = 2x + 3 and y = -x - 4

Click here to see answer by Fombitz(32388)

Question 327400: write an inequality on the variable x for the degree measure of the smallest ngle of the triangle , given tha the gegree measure ofthe smallest angle is at most 30 degrees.
Click here to see answer by stanbon(75887)

Question 327469: solve by substitution method
6x+7y= -13
-4x+y=37
Click here to see answer by user_dude2008(1862)

Question 327461: solve by elimination method
5x+5y=-11
7x-3y=19
Click here to see answer by user_dude2008(1862)

Question 327468: 4x-9y=14.5
7y-2x=-8.5
Click here to see answer by checkley77(12844)

Question 327467: solve by elimination method
0.3x-0.2y=4
0.2x+0.3y=-37/17
Click here to see answer by checkley77(12844)

Question 327466: solve by elimination method
4x-9y=14.5
7y-2x=-8.5
Click here to see answer by checkley77(12844)

Question 327463: solve by substitution method
4m+n=10
m-4n=11
and
6x+7y=-13
-4x+y=37
Click here to see answer by checkley77(12844)

Question 327016: If you multiply the sale price per box times the number of boxes, that's your total price. But remember, these boxes are on sale. The regular price per box is the same as the number of boxes. Your total price will be 75 times the amount you are saving on each box. When you add the regular price for each box to my sale price for each box, the result is 7 time the amount you are saving on each box. How many boxes are there, and what sale price for each box?

Click here to see answer by ankor@dixie-net.com(22740)

Question 327618: if the lengths of a pair of opposite sides of rectangle were doubled and the other pair of opposite sides were each decreased by 14 meters,the new rectangle would be a square with a perimeter of 84 meters. find the rectangle's original dimension..
Click here to see answer by AAfter Search(61)

Question 327665: I am having problems finding the equation of a line. Problem is: write an equation for the line parallel to the line -4y=2 through the point (8, -4). I can't get the jist of the way to figure out this problem
Click here to see answer by ankor@dixie-net.com(22740)

Question 327889: Solve by the substitution method
8m + n = 5
m - 9n = 28
Click here to see answer by mananth(16946)

Question 327903: Solve by elimination method

x + 6y = 55
-x + 3y = 17
Click here to see answer by stanbon(75887)

Question 327922: The perimeter of a rectangle is 134m. The length is 7m more than twice the width. Find the Dimensions.
What is the length?
What is the Width?
Click here to see answer by mananth(16946)

Question 327930: 3y-1 < 8y-3
use set builder notation to describe the complete solution?? please help
Click here to see answer by rapaljer(4671)

Question 327939: 47 - (2x + 5) less than or equal too 3(x+2)+ x
use set-builder notation to describe the complete solution
Click here to see answer by mananth(16946)

Question 327917: For children between ages 6 and 10, height y in (inches) is frequently a linear function of age t ( in years). The height of certain child is 48 inches at age 6 and 50.5 inches at age 7.
a) Express y as function of t.
b) Predict the height of the child at age 10.
Click here to see answer by Fombitz(32388)

Question 327942: Bayside insurance offers two health plans. Under plan A, Giselle would have to pay the first $100 of her medical bills, plus 40% of the rest. Under plan B, Giselle would pay the first $130, but only 20% of the rest. For what amount of medical bills will plan B save Giselle money? Assume she has over $130 in bills.

Click here to see answer by mananth(16946)

Question 328024: The perimeter of a rectangle is 196 inches. The length exceeds the width by 44 inches. Find the length and width???
Click here to see answer by rapaljer(4671)

Question 328035: Determine whether the ordered pair is a solution of the inequality.
(4,12); 3y - 4x > 8

Is the ordered pair a solution of the inequality?
Click here to see answer by Fombitz(32388)

Question 328040: Determine whether the given numbers are solutions of the inequality.
8, -14, -19, -2
y - 9 > 2y - 3

Is 8 a solution? yes or no?
Is -14 a solution?? yes or no?
Is -19 a solution?? yes or no?
Is -2 a solution?? yes or no?
Click here to see answer by solver91311(24713)

Question 328044: 0.7(7x+3) ≥ 1.8 - (x + 9)
Click here to see answer by nyc_function(2741)

Question 328077: Snookers Lumber can convert logs into either lumber or plywood. In a given day, the mill turns out three times as many units of plywood as lumber. It makes a profit of $30 on a unit of lumber and $40 on a unit of plywood. How many of each unit must be produced and sold in order to make a profit of $15300??

How many units of lumber and how many units of plywood are needed to be sold to reach the profit??
Click here to see answer by jessica43(140)

Question 328108: Write the equation in slope-intercept form: 2x + 3y = 18
Click here to see answer by Fombitz(32388)

Question 328112: y = 9x + 40
Click here to see answer by Fombitz(32388)

Question 328111: Write an equation in slope-intercept form of the line that passes through the point (-4, 1) and has a slope of -3/2
Click here to see answer by solver91311(24713)

Question 328031: Solve by the elimination method
0.3X - 0.2Y = 4
0.4X + 0.3Y = 49
--
23
Click here to see answer by Fombitz(32388)

Question 328258: what is the following system of equations by the addition method:
2x + y = 5 equation #1
3x - y = 10 equation #2
Click here to see answer by Fombitz(32388)

Question 328257: what is the following system of equations by the graphing method:
2x + y = 5 equation #1
-2x - y = 1 equation #2
Click here to see answer by Fombitz(32388)

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