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

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Question 146410: Two angles are complementary. The sum of the measure of the first angle and one-fourth the second angle is 63.75 degrees. Find the measure of the angles.
What is the measure of the smaller angle?
What is the measure of the other angle?

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Question 146417: What is the slope of 6X-(-3)
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Question 146466: How do you find the x, y coordinates?
y+4x-8 , y=2x=10
2x-3y=-2 , y=-4x+24
2x-10y=-12 , 3x+y=4
-3x+6y=48 , -5x+6y=32
x=6y-4 , x=-2y+28

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Question 146516: please solve this linear equation using elimination.
5x/12 - y/6 = 3
x + 2y = 0

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Question 146532: Solve the system of Equations
2/5x + 3/5y = 16/5
4x + 2y = 40
I know that some way you have to eliminate the fractions in the first equations. Where I am stuck at is how to eliminate the fractions and what type of method to use to solve it.

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Question 146537: Please help!
Tell whether the given ordered triple is a solution of the system.
1) (5, -2, 2)
2x-y+z=5
x+2y-z=-1
-2x+y-3z=-15



2) (1, -1, 3)
4x+2y+3z=11
x-2y+z=6
2x+y+2z=7
Thanks so much!

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Question 146538: Solve the system using any algebraic method.
1.
x-y+z=5
2y+3z=14
-3y+2z=5

2.
2x+2y+z=-5
2x+y+3z=7
-4x-2y-6z=-14
Thank you so much! I'm really confused.

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Question 146474: A two digit no is obtained by either subtracting 12 from 4 times the sum of its digits or by adding 6 to twicethe difference of its digits. Find the no.
(1)16 (2)28 (3)39 (4)can't be determined.....

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Question 146568: use substitution method
x-y=5
2x=2y+14

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Question 146567: 4x+5y=-2
4y-x=11

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Question 146566: 3x-5y=-9
5x-6y=-8

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Question 146565: 4x-5y=-2
3y-x=-3

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Question 146564: 5x+4y=7
x-3y=9

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Question 146605: solve by substitution method
9x+7x=-47
-5x+y=31

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Question 146609: solve the system by the elimination method
5x+5y=11
7x-3y=17

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Question 146611: Solve by the elimination method
2x+3y=2
4x+6y=4

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Question 146613: X=2y-7
3X +2y=-5

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Question 146473: In a three digit no, the difference between the hundreds digit and its tens digit is equal to the difference between its tens digit and its units digit.Also the sum of the digits is 9. How many nos r possible which satisfies the above conditions..?
(1)6 (2)7 (3)8 {4}9
Ans i opted is 6....but given no is 9...could anyone pplz explain...??

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Question 146429: I need to know if you can find the point slope of a line with two points and no slope. If so im am not sure how to do so. Can someoe please help me?
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Question 146667: Please help me solve this word problem:
An electrician, a carpenter, and a plumber are hired to work on a house. The electrician earns $21 per hour, the carpenter $19.50 per hour, and the plumber $24 per hour. The first day on the job, they worked a total of 21.5 hr and earned a total of $469.50. If the plumber worked 2 more hours than the carpenter did, how many hours did each work?

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Question 146667: Please help me solve this word problem:
An electrician, a carpenter, and a plumber are hired to work on a house. The electrician earns $21 per hour, the carpenter $19.50 per hour, and the plumber $24 per hour. The first day on the job, they worked a total of 21.5 hr and earned a total of $469.50. If the plumber worked 2 more hours than the carpenter did, how many hours did each work?

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Question 146683: Solve the system of equations by graphing. then classify the system as consistant of inconsistant and the equalities as dependant or independant.
7x+y=12
8x+9y=-57
What is the solution of the system of equalities

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Question 146700: X=2y-7
3X +2y=-5
use addition method

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Question 146775: Graph the equality on a plane.
3x+4y is greater than or = to 12

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Question 146472: if %28bx+-+ay%29%2Fb+=+%28cy+-+bz%29%2Fc+=+%28az+-+cx%29%2Fa and given that bx%21=ay
cy%21=bz and az%21=cx, which of the follwing is true...??
(1)a%2Bb=c (2)a%2Bb%2Bc=0 (3)ab%2Bbc%2Bca=0 (4)ab%2Bbc-ca=0

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Question 146852: the solution set of x+y=2 and 3x=-2y-6
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Question 146851: the solution set for x+y=2 and 2x+y=3
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Question 146896: 1) Solve the system of equations by graphing. Then classify the system as consistent or inconsistent as dependent or independent.
7x-9y=-18
9y-7x=18

What is the solution of the system of equations?
a) Infinitely many solutions
b) No solution
c) A point

Is the system consistent or inconsistent?

Are the equations dependent or independent?

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Question 146898: 6) Graph the equation and identify the y-intercept
y+x=-9
the y-intercept is

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Question 146898: 6) Graph the equation and identify the y-intercept
y+x=-9
the y-intercept is

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Question 146899: 6) Graph the equation and identify the y-intercept
y+x=-9
the y-intercept is

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Question 146956: solve the system using the substitution method. present as an ordered method. If not, specify whether the answer is no solution or infinite many solution
4x + y=4
2x + 8y=0

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Question 146931: Solve system using the subsitution method"
x^2+3y=25
x+y=7

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Question 147009: Solve each system by the addition method:
3/7x+5/9y=27
1/9x+2/7y=7

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Question 147030: Write the equation of a line whose slope is 6 and whose y intercept is -3.

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Question 147027: I really need help with solving a system using the elimination method. Please!
x^2+3y=25
x+y=7

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Question 147031: Find the x and y intercepts of each linear equation. Be sure to write your answers as ordered pairs.
A. y = 3x - 6
B. 6y = -x + 2

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Question 147028: Please help me solve the following system using Gaussian Elimination method:
2x+5y=14
x-3y=-4

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Question 147151:
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Question 147162: For 1989 and 1990 Dave Johnson had the highest decathlon score in the world. When Johnson reached a speed of 32 ft/sec on the pole vault runway, his height above the ground t seconds after leaving the ground was given
by h= -16t^2+32t . (The elasticity of the pole converts the horizontal speed into vertical speed.) Determine how long Johnson was in the air. For how long was he more than 14 ft in the air?

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Question 147161: The total profit (in dollars) for sales of x rowing machines is given by P(x)=-02x^2+300x-200. What is the profit if 500 are sold? For what value of x will the profit be at a maximum
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Question 146932: Solve system using graphical method
y=-3x+8
y=2x+3

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Question 146929: Solve system using elimination method
x^2+3y=25
x+y=7

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Question 147251: 9x-5y=-35 , 5y-9x=35. what is the solution to the system of equations? is the system consistant?
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Question 147333: 9x-4y=8
4y-9x=-8
consistant or inconsistant
dependant or independant
What is the solution of the system of equations
a. infinetly many solutions
b. a point
c. no solution

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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