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

Tutors Answer Your Questions about Linear-equations (FREE)

Question 628304: Consider the line 8x-7y=-1, find the equation of the line that is parallel to this line and passes through the point (1,3). Find the equation of the line that is perpendicular to this line and passes through the point (1,3)
Click here to see answer by lwsshak3(6528)

Question 628341: write am equation in slope-intercept form with a slope of 7 and y intercept of 1.
Click here to see answer by richwmiller(9143)

Question 628315: Hi! I'm having trouble with my Math homework and I'm hoping that you could answer it.
Here is the problem:
A pipe that takes 30 minutes to fill a tank has been running to fill an empty tank. After 10 minutes, it is shut off and then a second pipe was opened and was able to fill the tank in 15 minutes. How long will it take the second pipe alone to fill the tank?
Thanks so much!
Click here to see answer by ankor@dixie-net.com(15667)

Question 628316: Hi! I have another question on applications of linear equations. That is, word problems.
A fast train was help up by a red-light signal for 16 minutes and made up for the lost time on a 80-km stretch travelling at 10 kph faster than called by schedule. What is the scheduled speed of the train?
Thank you so much!
Click here to see answer by ankor@dixie-net.com(15667)

Question 628441: a certain mountain has has an elevation of 19260. in 1916 the glacier on this peak covers 9 acres.by 2001 the glacier has melted to only 1 acre.
what is the equation that gives the acreage of the glacier t years after 1916?
Click here to see answer by stanbon(57424)

Question 628451: Graph x + 4 = y
Click here to see answer by reviewermath(535)

Question 628452: Graph |x| + 1 = y
Click here to see answer by reviewermath(535)

Question 628453: Graph 2x + 3 = y
Click here to see answer by reviewermath(535)

Question 628455: Graph x = y,
Click here to see answer by reviewermath(535)

Question 628456: find the slope and y-intercept of the line in the given equation.
y=-1/5x-6
Click here to see answer by jim_thompson5910(28598)

Question 628454: Graph x = 4
Click here to see answer by jim_thompson5910(28598)

Question 628454: Graph x = 4
Click here to see answer by reviewermath(535)

Question 628457: write the slope-intercept equation for the line that passes through (-5, 10) and (-4, 3). Please show all of your work.
Click here to see answer by jim_thompson5910(28598)

Question 628457: write the slope-intercept equation for the line that passes through (-5, 10) and (-4, 3). Please show all of your work.
Click here to see answer by reviewermath(535)

Question 628458: Write the slope-intercept equation for the line that passes through (-5, -8) and is perpendicular to 10x – 6y = -11 Please show all of your work.
Click here to see answer by reviewermath(535)

Question 628500: Find the slope of the line with these given points (9, 3) and (3, -6)
Click here to see answer by jim_thompson5910(28598)

Question 628500: Find the slope of the line with these given points (9, 3) and (3, -6)
Click here to see answer by lenny460(778)

Question 628542: What time after 8 o’ clock will the hands of the continuously driven clock be opposite each other?

Click here to see answer by Alan3354(30993)

Question 628582: i need to find the slope of this equation 4x-2y= -2
Click here to see answer by Alan3354(30993)

Question 628633: A line passes through (-6,-1) with a slope of 3/3. find two additional points on the line
Click here to see answer by Alan3354(30993)

Question 628658: find the intercepts of y=-4x^2+4x-1

Click here to see answer by reviewermath(535)

Question 628692: The Internet Book Company charges $6 postage for 2 books, and $10 postage for 5 books.
a) Find an equation relating the postage charge and number of books.
b) How much will it charge to post 8 books?
Click here to see answer by John10(245)

Question 628623: Suppose that a certain strain of pea plant requires 14 days to reach a height of 6 inches and 30 days to reach a height of 16 inches. Write a linear equation in slope-intercept form that models the height of the plant after x days

Click here to see answer by ankor@dixie-net.com(15667)

Question 628773: y=9mx-4b; solve for b
Click here to see answer by Tatiana_Stebko(1326)

Question 628943: Y+3=4Y+18
Click here to see answer by jim_thompson5910(28598)

Question 628983: I need help solving this two part algebra problem. I'm not sure if it's a slope equation.
Given: f(x)=x^2+3x-2, find:
a. f(-2)

b. f(3)
Click here to see answer by jim_thompson5910(28598)

Question 629025: the system y is less than or equal to 5x+1 and x is less than or equal to 0. which of the ordered pairs is a solution of the system?
Click here to see answer by stanbon(57424)

Question 628729: My question is how do you write a system of linear equations for this rectangle? If the perimeter of this rectangle is 42feet. The length is 7ft longer than the width. I am suppose to find the deminsions, and write a system of equations and solve. Let x be length and y be the length. 2x+2y= and the second equation x=y+
Then I need the length and what the width of the rectangle is.
I would assume that I would add 42 twice, but from there I am not sure.
Click here to see answer by meetkisai(17)

Question 629106: find the slope if it exists, of the line containing the pair of points.

(-19,-10) and (-20,-15)
Click here to see answer by jim_thompson5910(28598)

Question 629098: 7x-8y=3
Click here to see answer by lenny460(778)

Question 629227: find the equation in slope-intercept form of the line that passes through the point (-1, -3) and is parallel to the line y=8
Click here to see answer by solver91311(16897)

Question 629227: find the equation in slope-intercept form of the line that passes through the point (-1, -3) and is parallel to the line y=8
Click here to see answer by ewatrrr(10682)

Question 629227: find the equation in slope-intercept form of the line that passes through the point (-1, -3) and is parallel to the line y=8
Click here to see answer by josmiceli(9698)

Question 629255: Hello,
How to solve x + y =10
Where y is 4 years older than x.
Click here to see answer by darknez25(6)

Question 629349: y=3x-0 whta is the answer?

Click here to see answer by jim_thompson5910(28598)

Question 629349: y=3x-0 whta is the answer?

Click here to see answer by Alan3354(30993)

Question 629388: Could you show me how to graph the equation Y=3/2x+4 each step not just the graph but each step of solving the equation
Click here to see answer by jim_thompson5910(28598)

Question 629561: What is the slope of the line represented by the equation
x = -6?
Click here to see answer by ewatrrr(10682)

Question 629604: how to solve this using substitution and check
x-6y+4=0
y= -3

Thanks
Click here to see answer by stanbon(57424)

Question 629686: Is there a way to tell if there is no solution by just looking at the equations?

Click here to see answer by Edwin McCravy(8924)

Question 629686: Is there a way to tell if there is no solution by just looking at the equations?

Click here to see answer by richwmiller(9143)

Question 629781: Write point-slope form of the line to satisfy the given conditions. Then use the point -slope form of the equation to write the slope intercept form of the equation?
passing through (4,12) and (6,18)
Can some one help with this problem????
Click here to see answer by stanbon(57424)

Question 629792: 5x-2y=9

Click here to see answer by reviewermath(535)

Question 629841: If the line passing through the points (1,k) and (5,4k) is parallel to the line x+3y-2=0, find the value of k
Click here to see answer by lwsshak3(6528)

Question 629918: Write the equation in slope-intercept form of the line containing the points (4,6) and (2,7)
Click here to see answer by Charles3475(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, 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