Questions on Algebra: Linear Equations, Graphs, Slope answered by real tutors!

Tutors Answer Your Questions about Linear-equations (FREE)

Question 289137: solve by substitution
I need help finding the response to these sentences
2m+n=16
m-3n=15
Click here to see answer by jim_thompson5910(35256)

Question 289137: solve by substitution
I need help finding the response to these sentences
2m+n=16
m-3n=15
Click here to see answer by stanbon(75887)

Question 289138: I need help solving these sentences

9x+8y=14
-4x+y=12
Click here to see answer by jim_thompson5910(35256)

Question 289138: I need help solving these sentences

9x+8y=14
-4x+y=12
Click here to see answer by brucewill(101)

Question 288452: You sell premium toasters and are making a pricing decision. At a price of $100 (or �p = $100�) you predict that you can sell 30 of these premium toasters at your Scottsdale, Arizona location. If the price is raised to $110 you predict that you can sell 25 of these premium toasters at your Scottsdale, Arizona location. Find the equation of the line and you can write your answer in the following form: p = mx + b.
Click here to see answer by elowole(1)

Question 289175: I need help solving
5x+2y=-7
7x-3y=13
Click here to see answer by checkley77(12844)

Question 289221: I am really struggling with this one. Can you please help me out!!!!
Solve by he Elinination method.
x+4y=14
-x+3y=7
What is the solution of the system and type and ordered par if there is.
or if there is not a sloution, state it or if there i too many solutions, state that please.
Click here to see answer by richwmiller(17219)

Question 289350: I'm not sure how to do this one... I'm sure there's a certain "formula" but I don't know it.
Write an equation for the line parallel to the line 4x=-3 through the point (4,-3).
Click here to see answer by richwmiller(17219)

Question 289360: Provide 3 coordinate points that would lie on the line x=7. Explain in your own words what the line x=7 would look like if it were graphed, and explain how do you know?

Click here to see answer by richwmiller(17219)

Question 289424: create a non-linear function with two inputs
Click here to see answer by user_dude2008(1862)

Question 289389: the problem is 4x-6y=5and 2x-3y=7 am I suppose to multiple the top by a number

Click here to see answer by richwmiller(17219)

Question 289522: If x = -3, what is the value of:
X2 - 1 (the X2 is squared)
______
X + 1
Click here to see answer by richwmiller(17219)

Question 289533: Write the equation of the line with slope -9 and y-intercept (0,4)
Click here to see answer by richwmiller(17219)

Question 289536: What is the equivalent to
3a + 4b - (-6a - 3b)
and how do you get to the answer?
Click here to see answer by richwmiller(17219)

Question 289602: x + y = 1
2x - 3y = 12
Click here to see answer by Fombitz(32388)

Question 289633: PQ = P + Q (solve for P) My book says I have to factor the "P" out of the terms it's in. Because there example is confusing and I think they're skipping some steps, I don't know how to do this.
Click here to see answer by Fombitz(32388)

Question 289639: PQ - Q = P (solve for P) My book says that I have to factor "P" out of the terms it's in. Because their example is confusing and I think they're skipping steps, I don't know how to do this. Please help, Thanks!
Click here to see answer by richwmiller(17219)

Question 289643: s - a(subscript 1)*r = a(subscript 2)*r + a(subscript 3)*r ...(Solve for r).
I worked this problem and got r = s/a(subscript 2)*a(subscript 3)*a(subscript 1)*3. This problem is really confusing and the answer is too.
Click here to see answer by richwmiller(17219)

Question 289597: write 6x - 7y + 9= 0
Click here to see answer by checkley77(12844)

Question 289630: 2x+1/3 - 3-x/4 = x/6 I tried solving this by getting all the varibles on one side by multiplying by the LCD, but it isn't coming out right
Click here to see answer by richwmiller(17219)

Question 289844: How many ordered pairs (x; y) of positive integers x and y satisfy the equation
3x+5y = 80?

Click here to see answer by richwmiller(17219)

Question 289866: 1.The graph shows the amount of gas in the tank of Sharon's car during a trip to her mom's house. http://i43.tinypic.com/jq4x12.gif theres the graph
a. At one point Sharon started the trip. When did she do that?
b. Approximately how many gallons did she have when she started the trip?

thanks.

Click here to see answer by stanbon(75887)

Question 290071: how do you find the point of intersection through an equation?
Click here to see answer by richwmiller(17219)

Question 290094: What is the inherent meaning and justification of cross-multiplication as it applies to solving an inequality?
Click here to see answer by richwmiller(17219)

Question 290060: Two cyclists drive a distance of 15 kilometres. One of the cyclists
drives 10 km h faster than the other one and arrives at their destination
20 minutes earlier. What are the speeds of the cyclists?
Click here to see answer by ankor@dixie-net.com(22740)

Question 290294: x+3y=-9 graph the linear equation

Click here to see answer by jim_thompson5910(35256)

Question 290366: How do i solve the equation to see if it is a solution for an ordered pair, I don't understand the substitution or how to substitute what? My equation I have to see if it is a true solution or not to:
(3,2); x+2y=7 What do I use to substitute numbers, my text shows it but it is way too confusing for me to understand.
Thanks,
Millie
Click here to see answer by richwmiller(17219)

Question 290413: Suppose that g(x) is a linear function and also that g(1)=12 and g(-2)=-3. Find an algebraic formula for g(x) .
Click here to see answer by richwmiller(17219)

Question 290416: Find an equation of the line containing the given pair of points (3,1) and (9,6)
Click here to see answer by checkley77(12844)

Question 290383: Please help me here, I am lost! Here is the problem: solve the systems of equations without using matrix capabilities of a calculator. I need to show how to work this through:
3x+y-2z=5
5x+2y+z=6
-7x-3y-4z=-7
Thanks for any help available! It is appreciated!
Click here to see answer by checkley77(12844)

Question 290420: identify the slope and y intercept of y=x-4
Click here to see answer by MathLover1(20849)

Question 290438: Is it always true that √(a^2+b^2 )=a+b? Is it sometimes true? Or is it always false? Please use and example.
Click here to see answer by toidayma(44)

Question 290488: y=-9+9
Click here to see answer by richwmiller(17219)

Question 290490: Find the slope, if it exists. y=-9x+9

Click here to see answer by richwmiller(17219)

Question 290491: Translate to an inequality. The average speed, s, was between 100 and 130 mph.
Translation:100 - S - 130

Click here to see answer by richwmiller(17219)

Question 290432: allie ode her bike for 2 hours at 7 miles per hour and then for 3 hours at 5 miles per hour.how far did allie ride in all
Click here to see answer by checkley77(12844)

Question 290498: Transalte to an inequality. The average speed, s, was between 60 and 130 mph.

Click here to see answer by richwmiller(17219)

Question 290597: f(x)=4x-3 h(x)=-5x+7
solve: f(-3)+h(2)
Click here to see answer by user_dude2008(1862)

Question 290558: How do we know if a system of equations represents the same line? Provide an example and show your work, using the slope-intercept equation. You do not need to provide a graph.
Click here to see answer by richwmiller(17219)

Question 290502: 2y=x+2
(0,4)
Click here to see answer by checkley77(12844)

Question 290502: 2y=x+2
(0,4)
Click here to see answer by slippin143(1)

Question 290776: Find an equation of the line that passes through (2,2) and is perpendicular to y=2x-6. need help thanks.
Click here to see answer by Greenfinch(383)

Question 290847: what is the slope of the line 3x-2y=5
Click here to see answer by richwmiller(17219)

Question 290842: Find the slope, if it exists x+9y=18
Click here to see answer by richwmiller(17219)

Question 290804: find the slope and y intercept of the line 3Y+7X+7=9+7x
Click here to see answer by checkley77(12844)

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, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 17551..17595, 17596..17640, 17641..17685, 17686..17730, 17731..17775, 17776..17820, 17821..17865, 17866..17910, 17911..17955, 17956..18000, 18001..18045, 18046..18090, 18091..18135, 18136..18180, 18181..18225, 18226..18270, 18271..18315, 18316..18360, 18361..18405, 18406..18450, 18451..18495, 18496..18540, 18541..18585, 18586..18630, 18631..18675, 18676..18720, 18721..18765, 18766..18810, 18811..18855, 18856..18900, 18901..18945, 18946..18990, 18991..19035, 19036..19080, 19081..19125, 19126..19170, 19171..19215, 19216..19260, 19261..19305, 19306..19350, 19351..19395, 19396..19440, 19441..19485, 19486..19530, 19531..19575, 19576..19620, 19621..19665, 19666..19710, 19711..19755, 19756..19800, 19801..19845, 19846..19890, 19891..19935, 19936..19980, 19981..20025, 20026..20070, 20071..20115, 20116..20160, 20161..20205, 20206..20250, 20251..20295, 20296..20340, 20341..20385, 20386..20430, 20431..20475, 20476..20520, 20521..20565, 20566..20610, 20611..20655, 20656..20700, 20701..20745, 20746..20790, 20791..20835, 20836..20880, 20881..20925, 20926..20970, 20971..21015, 21016..21060, 21061..21105, 21106..21150, 21151..21195, 21196..21240, 21241..21285, 21286..21330, 21331..21375, 21376..21420, 21421..21465, 21466..21510, 21511..21555, 21556..21600, 21601..21645, 21646..21690, 21691..21735, 21736..21780, 21781..21825, 21826..21870, 21871..21915, 21916..21960, 21961..22005, 22006..22050, 22051..22095, 22096..22140, 22141..22185, 22186..22230, 22231..22275, 22276..22320, 22321..22365, 22366..22410, 22411..22455, 22456..22500, 22501..22545, 22546..22590, 22591..22635, 22636..22680, 22681..22725, 22726..22770, 22771..22815, 22816..22860, 22861..22905, 22906..22950, 22951..22995, 22996..23040, 23041..23085, 23086..23130, 23131..23175, 23176..23220, 23221..23265, 23266..23310, 23311..23355, 23356..23400, 23401..23445, 23446..23490, 23491..23535, 23536..23580, 23581..23625, 23626..23670, 23671..23715, 23716..23760, 23761..23805, 23806..23850, 23851..23895, 23896..23940, 23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975, 24976..25020, 25021..25065, 25066..25110, 25111..25155, 25156..25200, 25201..25245, 25246..25290, 25291..25335, 25336..25380, 25381..25425, 25426..25470, 25471..25515, 25516..25560, 25561..25605, 25606..25650, 25651..25695, 25696..25740, 25741..25785, 25786..25830, 25831..25875, 25876..25920, 25921..25965, 25966..26010, 26011..26055, 26056..26100, 26101..26145, 26146..26190, 26191..26235, 26236..26280, 26281..26325, 26326..26370, 26371..26415, 26416..26460, 26461..26505, 26506..26550, 26551..26595, 26596..26640, 26641..26685, 26686..26730, 26731..26775, 26776..26820, 26821..26865, 26866..26910, 26911..26955, 26956..27000, 27001..27045, 27046..27090, 27091..27135, 27136..27180, 27181..27225, 27226..27270, 27271..27315, 27316..27360, 27361..27405, 27406..27450, 27451..27495, 27496..27540, 27541..27585, 27586..27630, 27631..27675, 27676..27720, 27721..27765, 27766..27810, 27811..27855, 27856..27900, 27901..27945, 27946..27990, 27991..28035, 28036..28080, 28081..28125, 28126..28170, 28171..28215, 28216..28260, 28261..28305, 28306..28350, 28351..28395, 28396..28440, 28441..28485, 28486..28530, 28531..28575, 28576..28620, 28621..28665, 28666..28710, 28711..28755, 28756..28800, 28801..28845, 28846..28890, 28891..28935, 28936..28980, 28981..29025, 29026..29070, 29071..29115, 29116..29160, 29161..29205, 29206..29250, 29251..29295, 29296..29340, 29341..29385, 29386..29430, 29431..29475, 29476..29520, 29521..29565, 29566..29610, 29611..29655, 29656..29700, 29701..29745, 29746..29790, 29791..29835, 29836..29880, 29881..29925, 29926..29970, 29971..30015, 30016..30060, 30061..30105, 30106..30150, 30151..30195, 30196..30240, 30241..30285, 30286..30330, 30331..30375, 30376..30420, 30421..30465, 30466..30510, 30511..30555, 30556..30600, 30601..30645, 30646..30690, 30691..30735, 30736..30780, 30781..30825, 30826..30870, 30871..30915, 30916..30960, 30961..31005, 31006..31050, 31051..31095, 31096..31140, 31141..31185, 31186..31230, 31231..31275, 31276..31320, 31321..31365, 31366..31410, 31411..31455, 31456..31500, 31501..31545, 31546..31590, 31591..31635, 31636..31680, 31681..31725, 31726..31770, 31771..31815, 31816..31860, 31861..31905, 31906..31950, 31951..31995, 31996..32040, 32041..32085, 32086..32130, 32131..32175, 32176..32220, 32221..32265, 32266..32310, 32311..32355, 32356..32400, 32401..32445, 32446..32490, 32491..32535, 32536..32580, 32581..32625, 32626..32670, 32671..32715, 32716..32760, 32761..32805, 32806..32850, 32851..32895, 32896..32940, 32941..32985, 32986..33030, 33031..33075, 33076..33120, 33121..33165, 33166..33210, 33211..33255, 33256..33300, 33301..33345, 33346..33390, 33391..33435, 33436..33480, 33481..33525, 33526..33570, 33571..33615, 33616..33660, 33661..33705, 33706..33750, 33751..33795, 33796..33840, 33841..33885, 33886..33930, 33931..33975, 33976..34020, 34021..34065, 34066..34110, 34111..34155, 34156..34200, 34201..34245, 34246..34290, 34291..34335, 34336..34380, 34381..34425, 34426..34470, 34471..34515, 34516..34560, 34561..34605, 34606..34650, 34651..34695, 34696..34740, 34741..34785, 34786..34830, 34831..34875, 34876..34920, 34921..34965, 34966..35010, 35011..35055, 35056..35100, 35101..35145, 35146..35190, 35191..35235, 35236..35280, 35281..35325, 35326..35370, 35371..35415, 35416..35460, 35461..35505, 35506..35550, 35551..35595, 35596..35640, 35641..35685, 35686..35730, 35731..35775, 35776..35820, 35821..35865, 35866..35910, 35911..35955, 35956..36000, 36001..36045