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

Tutors Answer Your Questions about Linear-equations (FREE)

Question 551090: 1. Write the equation of the line passing through the points (0, -4) and (-2, 2. Write the equation of the line with a slope of -5 and a y-intercept of (0,3).
3. Write the equation of the line passing through the points (0, -4) and (-2, 4. Write the equation of the line passing through the points (-6,1) and (-4,2).

Click here to see answer by jim_thompson5910(28717)

Question 551156: What is an equation of the line that passes through the point (−1,−3) and is parallel to the line 6x−y=4. Express your answer in slope-intercept form.
Click here to see answer by mathstutor458(57)

Question 551166: How do I find the value of k so that the line passing through has the given slope m in the problem
(-k+1,3), (3,k+3), m=3
Click here to see answer by lwsshak3(6763)

Question 551157: Translate to an equation.
f=folder's at $0.30 apiece
and n=notebooks at $1.50 apiece
The total of folders and notebooks is $12
Graph the equation, and use the graph to determine three different combinations of folders and notebooks that total $12
Click here to see answer by fcabanski(889)

Question 551165:
slope=m= y2-y1=55.9-59.5
x2-x1=1984-1964
m=-3.6= -0.18
20
y-intercept =b=+61
Can someone explain the steps to find +61 .I course understand all that is needed for finding the line of best fit. I just don't know where b=+61 comes into play.

Click here to see answer by Alan3354(31532)

Question 551229: A triangle has base 12 centimetres and 8 centimetres . How much do you have to increase each dimension equally so that the area is tripled?
Click here to see answer by Alan3354(31532)

Question 551287: I'm trying to determine the total cost of a loan, using the formula: Total cost = (sale price*rate)time + Sale Price My Question is what does the last sale price mean?

Click here to see answer by fcabanski(889)

Question 551301: the line parallel to y = -2x +3 through (-4,3)
Click here to see answer by TutorDelphia(193)

Question 551308: Solve using addition-subtraction method to solve. and check
4x+6y=16
3x-2y= -1
Click here to see answer by Alan3354(31532)

Question 551286: Determine the total cost of your loan, using the formula: Total cost = (sale price*rate)time + Sale Price
Click here to see answer by richard1234(5390)

Question 551481: So I have been doing some workbooks to refresh myself in algebra lately to get back into school and a ran into a problem that for the life of me I cannot understand, its a Linear Equation that in order to find the value of X you have to eliminate the fractions to break it down, now the question in the book reads:
"Solve The Following Equation: 5 - (1/6)x = {-(2/3)}x "
now i have worked it down several times but it never matched what the answer in the workbook of " 30-x=9x "
from what the book says it should be its easy to find the solution is " X=3 " but when I work down the original equation I get this:
5 - (1/6)x = {-(2/3)}x ***convert to fractions**
5/1 - x/6 = -(3x/2) **next multiplied each term by the LCD of 6,or 6/1**
5/1*6/1 - x/6*6/1 = {-(3x/2)}*6/1 ***ok......
here is where i am confused, after canceling out the denominators my ending equation is " 30-x= -9x " now it has been along time since i have done any math assignments but i thought a negative multiplied by a positive stayed a negative # but my book says it becomes positive? is that right? Is -3x*6= to 9x? if so why? i thought like-signs always made a positive in multiplication

Click here to see answer by scott8148(6628)

Question 551536: A student makes a$9.25 purchase at the book store with $20 bill. The store has no bills, the change is in quarters and fifty cent pieces. There are 30 coins. How many is quarters and how many fifty cent pieces?
A disc jockey must play 12 commercial spots during 1 hr. of a radio show. Each comm. is either 30 sec. or 60 sec. long. If the total comm. time during 1 hr. is 8 min, How many 30 sec. comm. were played that hour? How many 60sec. comm?
Click here to see answer by mananth(12270)

Question 551557: 14x+6y=24
6x+14y=12
Click here to see answer by mananth(12270)

Question 551581: Use scientific notation to divide the following two numbers. Express the answer using scientific notation; retain at least three decimal places.
(1.83 · 106) / (1.2 · 104)

Click here to see answer by KMST(1936)

Question 551663: If a child were four times his present age, he would be half as old as his father is now. If his father is 30 years old, how old is the child now?

Click here to see answer by ankor@dixie-net.com(15746)

Question 551575: Short Answer: Simplify the following expression, and rewrite it in an equivalent form with positive exponents.
(6x-1)-2

Click here to see answer by ankor@dixie-net.com(15746)

Question 551754: solve the system by substitution.
{-x+y=-1
{3x-2y=1
Click here to see answer by deborabr(181)

Question 551872: Write the slope-intercept for the line with slope= (-1/2) and y-intercept=(0,3) and graph line.
Click here to see answer by jim_thompson5910(28717)

Question 551869: Find the x and y intercepts and graph the equation plotting the intercepts.
-3x-5y=15
Click here to see answer by jim_thompson5910(28717)

Question 551899: Simplify the following expression; express in terms of i. √-4
Click here to see answer by jim_thompson5910(28717)

Question 551991: solve the equetion (3/2)x+15=6

Click here to see answer by jerryguo41(162)

Question 552026: Which of the following describes the line that passes through the point (4,7) that is parallel to the line represented by the equation: -3x + y = 4
a.y=-3+19
b.y=3x-5
c.y=1/3x+52/3
d.y=-1/3x+81/3
Click here to see answer by unlockmath(1614)

Question 552084: find the three consicutive numbers whose sum is 108

Click here to see answer by rfer(12730)

Question 551994: why are 3x+6y=12 and 6x-3y=9 parallel
Click here to see answer by neatmath(300)

Question 552103: Write the slope-intercept equation for the line that passes through (-3,-15) and is perpendicular to -6x+8y=3
Click here to see answer by mananth(12270)

Question 552101: Write the slope-intercept equation for the line that passes through
(2,-9) and (4,1)
Click here to see answer by mananth(12270)

Question 552099: Find the slope and y-intercept of the line in the given equation.
y= -2/7x-3
Click here to see answer by mananth(12270)

Question 552055: What is an equation of the line that passes through the point (−2,−4) and is perpendicular to the line x+5y=15. Express your answer in slope-intercept form.
y=mx+b
x+15=5y
15x/5
y=3
Click here to see answer by mananth(12270)

Question 552105: Using this equation: y-y^1=m(x-x^1), write the slope-intercept equation for the line with the given slope that contains the given point.
m=8/3;(3,-4)
Click here to see answer by JBarnum(2044)

Question 552012: (-5,-5), 6x-y=1,
Write an equation that passes through the given point and is parallel to the given line.
Click here to see answer by mananth(12270)

Question 552013: Write an equation of the line that passes through the given point and is perpendicular to the given line.
problem 1.
(1,-1),y=3x+2
problem 2.
(5,0),y=2/3x-4
problem 3.
(3,-7),y=-1/5x+1
Click here to see answer by mananth(12270)

Question 551997: I have a question on writing equations of parallel lines I understand that in order for an equation to be parallel with another, they must have the same slope. here is the problem. (3,-2),y=2/3x+1
Click here to see answer by ankor@dixie-net.com(15746)

Question 552157: Given (6,-15) is a point on the following line, convert the equation to point-slope form.
6x + 2y = 6

Click here to see answer by TutorDelphia(193)

Question 552434: I don't understand how to solve this linear equation -2b+6=-10
Click here to see answer by Theo(3504)

Question 552381: 3x+2y=8
Click here to see answer by Alan3354(31532)

Question 552482: CALCULATE THE SLOPE, THE X & Y INTERCEPT , THEIR CORRESPONDING POINTS OF ORIGIN AND THEN GRAPH THE FOLLOWING ORDERED PAIRS. 8X-4Y=24
Click here to see answer by JBarnum(2044)

Question 552520: 9. One of two supplementary angles is 30 degrees greater than twice the other. Find the degree measure of each angle.

Click here to see answer by Alan3354(31532)

Question 552520: 9. One of two supplementary angles is 30 degrees greater than twice the other. Find the degree measure of each angle.

Click here to see answer by stanbon(57977)

Question 552537: I am helping my daughter with her homework and I havent done algebra in years. If we need to draw a line oin a graph and shade in the correct area, how would we find where to draw the line for y is less than or equal to 2x -5? I cant seem to find the coordinates. Thank you.
Click here to see answer by Alan3354(31532)

Question 552491: What is the general form of a line passing through (4,7) and has an an angle of 60degrees with the line x=4 ?
Click here to see answer by Theo(3504)

Question 552605: Find the slope, if it exists, of the line containing the pair of points.
(1,10) and (8,-9)
the slope is:
Click here to see answer by fcabanski(889)

Question 552624: I just can't figure this out... please help :)
In 1990, the life expectancy of males in a certain country was 64.4 years. In 1995, it was 66.9 years. Let E represent the life expectancy in year t and let t represent the number of years since 1990.
The linear function E(t) that fits the data is
E(t)=____t+___.
(round to the nearest tenth)
Use the function to predict the life expectancy of males in 2005.
E(15)=____
(round to the nearest tenth)
Im at a loss.... Thank you in advance for your help!!!
Click here to see answer by solver91311(17077)

Question 552641: Write the slope-intercept form of the equation of the line in the graph. The points of the line in the graph are: (0,-5) and (5,1)
Click here to see answer by josmiceli(9817)

Question 552713: Use scientific notation to multiply the following two numbers. Express the answer using scientific notation; retain all nonzero decimal places.
(3.8 · 108) · (6.9 · 104)

Click here to see answer by rfer(12730)

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