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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 733508: I am a parent trying to help my student and she has to show her work. f(x)=x to the second power -8x+3
Approximate the zeros of the function to the nearest tenth.
Click here to see answer by Alan3354(69443)

Question 733510: How do I solve?
-p to the second power +2p+3=0
Click here to see answer by lynnlo(4176)

Question 733650: What is 8x+2 =5x+23 using the balance method?
Click here to see answer by Simnepi(216)

Question 733940: I have a problem to solve it is
3x+2y=4
5x-4y=3
A. (1,0.5)
B. (0.5,1)
C. (5,5.5)
D. (5/11, -2/11)
I have no idea how to solve this and I tried the subratction method that wasnt right so I know that I am doing something wrong can you help me
Thanks
Click here to see answer by Alan3354(69443)

Question 734097: `I have a problem to solve it is
3x+2y=4
5x-4y=3
A. (1,0.5)
B. (0.5,1)
C. (5,5.5)
D. (5/11, -2/11)
I have no idea how to solve this and I tried the subratction method that wasnt
right so I know that I am doing something wrong can you help me
Thanks''
Click here to see answer by IBRAHIM92(5)

Question 734213: how to solve 1/4 x-2y=1 and x-8y=4 using substitution?
Click here to see answer by lynnlo(4176)

Question 734325: 8 + 4/x = 9 1/3 need help with some of the steps. Thank you for any help
Click here to see answer by stanbon(75887)

Question 734261: Use a specified method to solve the system of equations.
(graphically)
y=4-x
y=x-6
I understand that the first ordered pair is (-1,4) and the second is (1,-6)
I just have no clue how to graph these.
Click here to see answer by mananth(16946)

Question 734463:
The answer is
I know how to get the
How do I get the 250 part?
Click here to see answer by MathLover1(20850)

Question 734551: Simplify the following expression: 2 (4x2)3 (y3)5
The answer is now the question is.....HOW do I even get there???
Click here to see answer by jim_thompson5910(35256)

Question 734596: (2x-1)(7x+x^2)

Click here to see answer by lynnlo(4176)

Question 734596: (2x-1)(7x+x^2)

Click here to see answer by MathLover1(20850)

Question 734832: Solve for x and y by deriving an expression for y from the second equation, and substituting it back into the first equation.
−5x−7y=9
6x+9y=-9

Click here to see answer by checkley79(3341)

Question 734890: I can't get the answer to the following problem ;
y-5x=-2
3x-7y=22
The instructions say to use the substitution method.
Click here to see answer by Alan3354(69443)

Question 734890: I can't get the answer to the following problem ;
y-5x=-2
3x-7y=22
The instructions say to use the substitution method.
Click here to see answer by KMST(5328)

Question 734975: Is anyone available for continuous help w/ algebra 2? please reply
Click here to see answer by MathLover1(20850)

Question 735148: y+2=3x
3x-y=-1
Click here to see answer by Tatiana_Stebko(1539)

Question 735196: A bourbon that is 54-proof is 27% alcohol by volume while one that is 81-proof is 40.5% alcohol. How many liters of 54-proof bourbon must be mixed with 1.0-L of 81-proof bourbon to produce a 66-proof bourbon? Give your answer to three decimal places.

Click here to see answer by stanbon(75887)

Question 735197: The price of gas at your local convenience store is $3.51 on Monday. On Wednesday, the price has decreased by 22%. On Friday, the price has increased by 14% from where it was on Wednesday. How much would it cost to fill up an 11 gallon fuel tank? Express your answer to the nearest penny.

Click here to see answer by GratefulGeek(3)

Question 735460: (5a)(5b). what would this be if i Simplify it

Click here to see answer by rfer(16322)

Question 735590: did I do this right if not can you tell me what I did wrong
2x + y = 5
x − 2y = 10
y = 5 − 2x
x − 2(5 − 2x) = 10
x − 10 + 4x = 10
5x − 10 = 10
5x = 0
x = 0
2(0) + y = 5
y = 5
Click here to see answer by rothauserc(4718)

Question 735746: How do solve this linear equation 2(x-5)=-11?
Click here to see answer by blwinbbbles(106)

Question 735949: I have tried many times i need serious help!this equation isn't working out right i don't know why, help!

Solve the linear system by using substitution:
2x+2y=6 and
-3x+5y=(-33)
Click here to see answer by mananth(16946)

Question 736647: What is the equation of the line described below written in slope-intercept form?
the line passing through point (0, 0) and parallel to the line whose equation is 3x + 2y - 6 = 0

Click here to see answer by solver91311(24713)

Question 736629: 4x+3y=-12 explain please

Click here to see answer by lynnlo(4176)

Question 736927: use the method of substitution to solve the system of linear equations.
9x+4y=9/4
y=4x-1
The solution is
Click here to see answer by MathLover1(20850)

Question 737007: I am having a problem solving the following equation:
-6(w+1)-w-11=-7(w+5)+18
My options for answers are:
1. The solution set is (enter answer)
2. The solution is all real numbers
3. The solution set is (a null symbol)
Click here to see answer by jim_thompson5910(35256)

Question 737205: mv+Mv=(m+M)u solve m
please help me solve for m
Click here to see answer by jim_thompson5910(35256)

Question 737352: 4x-4/3y=-2
-16+16/3y=8
the given system of linear equations has one solution, no solution, or an infinite number of solutions
Click here to see answer by lwsshak3(11628)

Question 737416: A man is 32 years older than his son,ten years ago he was 3 times as old as his son.find the present age of each.
Click here to see answer by Susan-math(40)

Question 737411: A lemming runs from a point A to a cliff at 4m/s,jumps over the edge at B and falls at C at an average speed of 25 m/s,if the total distance from A to C is 500 metres and the time taken for the journey is 41 seconds,find the height Bc of the cliff.
Click here to see answer by ankor@dixie-net.com(22740)

Question 737521: need to solve system by elimination.
7x - y = 14
6x + y = 25
Click here to see answer by checkley79(3341)

Question 737496: solve the following systems for the values of x and y:
y-x=1
y=1/2x+4

Click here to see answer by checkley79(3341)

Question 737649: how do i Determine whether the rule represents y as a linear function of x in this problem
y = 6 � 2.4x

Click here to see answer by rfer(16322)

Question 737727: A family has two cars. The first car has a fuel efficiency of 35 miles per gallon of gas and the second has a fuel efficiency of 20 miles per gallon of gas. During one particular week, the two cars went a combined total of 1725 miles, for a total gas consumption of 60 gallons. How many gallons were consumed by each of the two cars that week?
Click here to see answer by josgarithmetic(39617)

Question 687341:
Click here to see answer by superbrainiac(1)

Question 738474: How do i solve a linear equation? I understand it involves a variable and number line.

Click here to see answer by MathLover1(20850)

Question 738561: I am allowed to chose a method of choice...I am primarily confused by the way the equation is written. y + 2 = 0
5x - 2y= 9
Not sure how to use the substitution method when the "y" does not start with y=
I am also not sure how to use addition method when there is not an "x" in the first equation.
Thank you very much for your time and help in advance!!
Click here to see answer by mananth(16946)

Question 738782: Glenn is a chemist with Gemco Pharmaceutical. He needs to prepare 40 gallons of a 15% hydrochloric acid solution find the amount of a 12% solution and the amount of a 20% solution he should mix to get this solution.
Again, i know how to solve a system of equations, but i dont know how to translate this problem, please help.
Click here to see answer by josmiceli(19441)

Question 738986: With a wind behind it, Glenn's pigeon flies 72 miles from Santa Rosa to Cloverdale in 6 hours. The return trip takes 8 hours because the pigeon flies into the wind. If the wind speed is the same on each trip, find the speed of the pigeon in still air and find the wind speed.

I know how to solve a system of equations, but i dont know how to set this word problem up. For this problem, i am required to provide two variables and two equations. Please help.
Click here to see answer by mananth(16946)

Question 738971: the top of a roof is 8ft higher than the edge, 6 ft away. Find the slope
Click here to see answer by rfer(16322)

Question 739089: 2y=22

Click here to see answer by lenny460(1073)

Question 739444: How do you solve this system by graphing?
4x+3y=12
2x-5y=-20
Click here to see answer by jam123(18)

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