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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 403866: f(x) = 4x -3x + 5
f(1) f(3) f(5)
f(1)=4*1-3*1+5
f(1)=4-3+5
F(1)=6
F(3)=4*3-3*3+5
F(3)=12-9+5
F(3)=8
F(5)=4*5-3*5+5
F(5)=20-15+5
F(5)=10
What would be the slope of the line?????
Click here to see answer by richard1234(7193)

Question 403846: I have a problem that I can't seem to be able to set up. It is Pablo is 3 miles behind Marc. Pablo increases his speed to 5 miles per hour, while Marc, runs at 4mph. At this rate, how many miles will Pablo have to run to catch up to Marc? How long will it take?
Click here to see answer by ankor@dixie-net.com(22740)

Question 403985: What is the answer for (2x+7y cm)(2x- 7y cm)
Click here to see answer by stanbon(75887)

Question 404340: I am having serious problem trying to solve by elimination method
7x-8y=-41
8x+7y=50
Soution set is
Thank you for your help.
Click here to see answer by ankor@dixie-net.com(22740)

Question 404508: I need to solve the following system of equations
x+6y=9 (1)
x=7-6y (2)
What is the solution to the system?

Thank you
Click here to see answer by mananth(16946)

Question 404506: How would I graph the following system of inequalities?
y≥-1
x≥5
Thank you
Click here to see answer by mananth(16946)

Question 404599: hi please help me solve this problem ( solve the linear system using substitution) 3y+x=2, y-x=-6
Click here to see answer by stanbon(75887)

Question 404599: hi please help me solve this problem ( solve the linear system using substitution) 3y+x=2, y-x=-6
Click here to see answer by ewatrrr(24785)

Question 404598: hi, please help me solve this problem ( solve the linear system using subsitution) y-2x=-6. 5x-y=9
thank you
Click here to see answer by MathLover1(20850)

Question 404598: hi, please help me solve this problem ( solve the linear system using subsitution) y-2x=-6. 5x-y=9
thank you
Click here to see answer by ewatrrr(24785)

Question 404596: hi im having trouble solving the linear system using substitution can you please help me heres the problem im stuck on y-5=x , 4x-y=4
Click here to see answer by ewatrrr(24785)

Question 404699: How do you solve the following:
-3x+4y=12
2x+y=-8
2x+4y=-4
3x+5y=-3
5x+2y=-1
3x+7y=11
Please solve by linear combination with the steps

Click here to see answer by Alan3354(69443)

Question 404789: I need to solve for the indicated letter, and I don't even understand what it is I am suppose to do.
f=3g for g
Click here to see answer by rfer(16322)

Question 404857: Solve for unknown:
3x-4y=10
4x-3y=5
(I used the method of interchangeable coefficients but not getting the answer)
Click here to see answer by josmiceli(19441)

Question 404823: I need help with the following: 4x-9y = 61
10x+3y = 25
I am writing for my daughter. She has an IEP for math and is struggling with her work. She will write to you from this point forward, however, when you explain it would be helpful if you wrote your explanations as simply as possible. My daughter is also from another country. I am a music teacher and am no help whatsoever to her. Thanks, Mom (DB)
Click here to see answer by keksjr(7)

Question 405113: Is (0, -2) a solution of 2x - 5y = 10?
Click here to see answer by josmiceli(19441)

Question 405162: -4x+y=6
-5x-y+21
Click here to see answer by jim_thompson5910(35256)

Question 405456: Please help me solve this equation -21 - (6) + (-3)+ 11=
Click here to see answer by MathLover1(20850)

Question 405456: Please help me solve this equation -21 - (6) + (-3)+ 11=
Click here to see answer by Tatiana_Stebko(1539)

Question 405533: Solve and graph 2x=5y-11 and 3x=2y
Possible solutions to equation 1 (0,2.5) and (-5.5,0)
Possible solutions to equation 2 (0,0) and (2,3)
Note if Independent, dependent, or inconsistent
Click here to see answer by ewatrrr(24785)

Question 405663: How do you solve 2x+3y=1 and -3x+y=15 by substitution?
I have tried solving for the x and the y in the first probem but i getr frarctions and i dont think they are right..
Click here to see answer by MathLover1(20850)

Question 405621: The haloween association reported that last year Americans spent $0.68 billion more on candy than costumes for Halloween. If the total spent by Americans for both items was 3.18 billion, how much did Americans spend on each item?
Click here to see answer by checkley79(3341)

Question 406103: Example A: 2n + 3 = 13
Example B: n + 3 = 13
Which example is a one-step equation?
How is solving a two-step equation like solving one-step equation? How is solving them different?
Click here to see answer by ewatrrr(24785)

Question 406188: 10x-7=4x-25
Click here to see answer by ewatrrr(24785)

Question 406284: why is my penis small?
Click here to see answer by Alan3354(69443)

Question 406309: solve the system of equations by graphing then classify the system
y=-x-15
9x-8y=-16
Click here to see answer by Alan3354(69443)

Question 406311: solve by the substatution method
7x-8y=-35
7x+84=y
Click here to see answer by Alan3354(69443)

Question 406332: I have a question about linear systems using substitution.
How do solve:
x=6-4y
and
2x-3y=1

Click here to see answer by Alan3354(69443)

Question 406332: I have a question about linear systems using substitution.
How do solve:
x=6-4y
and
2x-3y=1

Click here to see answer by stanbon(75887)

Question 406419: how can i solve this system of equation by subtraction
4x-y=41
2x+y=25
Click here to see answer by stanbon(75887)

Question 406498: How do you solve y=6-2x
5y+8x=20
Click here to see answer by mananth(16946)

Question 406522: There are 1712 students at Fitch. There are 72 more girls than boys. How many girls are there?
Click here to see answer by rfer(16322)

Question 406578: -8x+3y=-33
5x+y=35
Solve?
Click here to see answer by mananth(16946)

Question 406744: Solve system of equations
X+3y-2z=-9
6x-4y+3z=29
2x+2y+z=13
Click here to see answer by ewatrrr(24785)

Question 406753: Solve by the substitution method.
5x+4y=6
x=22-6y
Click here to see answer by algebrahouse.com(1659)

Question 406813: My problem is 3x-2y=11 My x is 5 and my y is 2.
3[5]-2[2]=11
15-4=11
11=11
Click here to see answer by ewatrrr(24785)

Question 406878: Can some one tell me how to figure out this problem
(1,2)
y=2x
y-x=1
Click here to see answer by Alan3354(69443)

Question 406950: Im studying right now in College Algebra... parallel and perpendicular lines
I'm stuck on one of those questions. The instructions says to find the equation of the line satisfying the given conditions, giving it in slope-intercept form if possible.
Through (1,6) perpendicular to 3x+5y=1
I know that this is the answer, because a friend tried explaining it to me but I still don't understand how she got this answer.
y=5/3x+13/3
can you please help me
Click here to see answer by lwsshak3(11628)

Question 407346: i have to solve this linear system and write it as a ordered pair. can you help?
y=2x+7
3x-y=9
Click here to see answer by katealdridge(100)

Question 407336: System of equations.
x+y=3
2x+y=4
Click here to see answer by jim_thompson5910(35256)

Question 407001: substitution method:
x=y-1
y=4-2x?
Click here to see answer by ewatrrr(24785)

Question 407506: the sum of two numbers is 70. the difference between these numbers is 24. find the two numbers.
Click here to see answer by jim_thompson5910(35256)

Question 407511: solve by the substatution method
2x+4y=26
-2x+y=19
the solution is ______________
Click here to see answer by jim_thompson5910(35256)

Question 407537: in the 1920 the record for a certain race was 46.3 sec. in 1930 it was 46.1sec. let R(t)= the record in the race and t= the number of years since 1920 .

a)find a linear function that finds the data
b)use the function in a) to predict the record in 2003 and 2006
c)find the year when the record will be 44.50
Click here to see answer by graphmatics(170)

Question 407684: How many integers are solutions of 1.2 < x < 6.9
Click here to see answer by richard1234(7193)

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