Questions on Algebra: Graphs, graphing equations and inequalities answered by real tutors!

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Question 178154: 1. Graph 3x-1=5x-2
2. Graph y=|x| +3
3. Graph x+2=2x-1
4. Graph y=5x-2
My answers so far:
For Number 4, I substituted x for 0
I got (0,-2) I graphed a line straight up and down.
If x=1, then y=3 give my points at (1,3) This line is sloped now. Why is it changed? Which answer is right?
For Number 2, I subbed x for 0
I got (0,-1) and again got a straight line up and down.
If I made x=1, then y=4. This gets changed again to a slated line. Is this right?
For Number 3, I subbed x for 1.
I'm confused by this bc I came up with 3=1. Are these my points?
For Number 1, I subbed x for 0
I got 3(0)-1=5(0)-2
Then -1=-2
Now what do I do?
I really don't understand this. What I really don't understand is how to put these points on a graph.

Click here to see answer by solver91311(24713)

Question 178185: Question: When we multiply or divide on both sides by a negative number we must reverse the inequality symbol. I understand why this needs to be done. But why do we not have to do this when we are working with equations? Or do we do this with equations?
Click here to see answer by solver91311(24713)

Question 177992: can someone show me how do this problem
Fahrenheit temperature. Water boils at 212�F.
a) Use the accompanying graph to determine the Celsius
temperature at which water boils.
b) Find the Fahrenheit temperature of hot tap water at
70�C by solving the equation 70=5/9(f-32)

Click here to see answer by Alan3354(69443)

Question 178237: Is you replace the = sign of an equation with an inequality sign, is there ever a time when the same value will be a solution to both the equation and the inequality?
Click here to see answer by cartert(27)

Question 178458: Graph the inequality y<-3x-1 on the coordinate plane below. Show all work and explain why you did each step.
Thanks for your help!
Click here to see answer by cartert(27)

Question 178496: y= 2x + 1
Click here to see answer by jim_thompson5910(35256)

Question 178490: I really need help with these kind of problems my teacher is not a very good teacher so i need someone else to help me.
Click here to see answer by user_dude2008(1862)

Question 178492: I really need help with these kind of problems my teacher is not a very good teacher so i need someone else to help me.
Click here to see answer by Mathtut(3670)

Question 178508: Solve the system of equations.
a)x+y=8
x-y=2

Click here to see answer by Mathtut(3670)

Question 178482: The problem is this:
2. As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it.
a)The sales representative here tells you they also have two floor plans available, but they only have 38 homes available. Write an equation that illustrates the situation. Use x and y to denote floor plan #1 and floor plan #2 respectively. (( X + y = 38) is what i thought the equation would be)
b) The representative tells you that floor plan #1 sells for $175,000 and floor plan #2 sells for $200,000. She also mentions that all the available houses combined are worth $7,200,000. Write an equation that illustrates this situation. Use the same variables you used in part a.
((175,000x +200000y =72,000,000)is what i put for the equation)
c) Use elimination to determine how many houses with each floor plan are available. Explain how you arrived at your answer.
I have done this maybe 10 times. i keep coming up with x = 2576 but that does not make sense when i put that back into the orginal equation. Please Help! I have till 3 am est to turn it in. Thanks!
Click here to see answer by Mathtut(3670)

Question 178512: 4x-2y=-6
2x-y=-3

Click here to see answer by jim_thompson5910(35256)

Question 178512: 4x-2y=-6
2x-y=-3

Click here to see answer by Alan3354(69443)

Question 178538: can someone plase show me how to solve this problem
y=x+7
y=-x+2

y+3=-3(x-6)
Click here to see answer by Alan3354(69443)

Question 178536: can someone please help me with this problem

Draw l1 through (-4, 0) and (0, 6). What is the slope of any
line parallel to l1? Draw l2 through the origin and parallel to l1

Click here to see answer by solver91311(24713)

Question 178573: how do you look at a graph and be able to tell wich function it is?
Click here to see answer by Mathtut(3670)

Question 178581: I have to find the equation for the line describes in the following in slope intercepr form
1. passing through (-4,3) (1,-7) I did this one
2. passing through (-3,-2) and paralell the thegraph of -4x+y=2 I am having problem finding the rise over run in this problem I do not know the other x and y
Click here to see answer by Alan3354(69443)

Question 178580: I have to find the equation for the line describes in the following in slope intercepr form
1. passing through (-4,3) (1,-7) I did this one
2. passing through (-3,-2) and paralell the thegraph of -4x+y=2 I am having problem finding the rise over run in this problem I do not know the other x and y
Click here to see answer by josmiceli(19441)

Question 178578: how do i know if the equation is y=3/4x+7 how do i know wat the point to start off with
Click here to see answer by Mathtut(3670)

Question 178597: y

y=1/3x-6 graph the eqution by plotting graphs

Click here to see answer by cartert(27)

Question 178685: I need to solve the Inequality, and Graph my solution.

Click here to see answer by Mathtut(3670)

Question 178769: How do I solve C=2.85 + 30.52, finding and interpeting the C-intercept for the line?
Find and interpret the n-intercept for the line?
Graphing the line for n ranging from 0 through 20?
Can you please offer me some helpful information on how to solve these type of equations?
Thank you,
kelloggdmk
Click here to see answer by solver91311(24713)

Question 178763: which would require more heat melting 500g of 0c ice or turning 500g of 100c water into steam
Click here to see answer by Fombitz(32388)

Question 178778: Find the value of b so that the graph of bx + 5y = 10 and has a slope of 3
Click here to see answer by Mathtut(3670)

Question 178862: is lines slope undefined when the 0 is on top of the fraction or the bottom of the fraction
Click here to see answer by EMStelley(208)

Question 178853: y_>_2x+1
y_<_-x+1
how to shade ? graph ?
Click here to see answer by stanbon(75887)

Question 178910: y=4x-2

Click here to see answer by jojo14344(1513)

Question 178901: I need help on how to do this problem?
Fill in the chart given this linear equation:
3x - y = -10
**Type all your work below the chart.
x y
-2
-1
0
1
2

Click here to see answer by jojo14344(1513)

Question 178917: can someone please help me with this problem I have to solve each system by addition
x+y=7
x-y=9
Click here to see answer by colliefan(242)

Question 178964: A line has a slope of 7. For each pair of points that are on the line (3,-6) and (7,y) , use the slope formula to find the missing coordinate.
I know that y=22 but I do not know how or the steps used to get the answer y=22
Click here to see answer by jim_thompson5910(35256)

Question 178966: I need help please with this graphing problem by solving each system by addition
x-2y=-1
-x+5y=9
Click here to see answer by Mathtut(3670)

Question 178974: find slope of the line passing through the pair of points or state the slope is undefined
(-5,-1), (4,9)
Click here to see answer by jim_thompson5910(35256)

Question 178974: find slope of the line passing through the pair of points or state the slope is undefined
(-5,-1), (4,9)
Click here to see answer by Mathtut(3670)

Question 179048: x=y+2
Graph the linear equation
Click here to see answer by stanbon(75887)

Question 179051: Find the graph of the equation by plotting points.
y=-2x
Click here to see answer by jim_thompson5910(35256)

Question 179054: Graph the equation by plotting points.
y+3=0
Click here to see answer by Mathtut(3670)

Question 179050: Graph the equation by plotting points.
y-4x=0
Click here to see answer by jim_thompson5910(35256)

Question 179053: Graph the equation by plotting points.
x=4
Click here to see answer by Mathtut(3670)

Question 179056: A delivery company's charge for an overnight package weighing in excess of one pound is given by the formula c=2.83w+15.51, where w is the weight of the package in pounds. Find the following.
A 5 pound package cost ___ to send overnight. Please round to the nearest cent.
Click here to see answer by Mathtut(3670)

Question 179049: Find the intercepts and then use them to graph equation.
4x+y=8
Click here to see answer by Mathtut(3670)

Question 179075: A delivery company's charge for an overnight package weighing in excess of one pound given by the formula c=2.83 w+15.51, where w is the weight of package in pounds.
Find the following
A 5 lb package cost ___ to send overnight. Round to the nearest cent.
A 12- ib package cost ___ to send overnight. Round to the nearest cent.
Click here to see answer by Mathtut(3670)

Question 179074: Graph the equation by plotting points.
x=4

Click here to see answer by Mathtut(3670)

Question 179091: 4x+8y=2
8x-4y=4
ARE THESE LINES PERPENDICULAR, PARALLEL, OR NETHER?
Click here to see answer by Alan3354(69443)

Question 179082: A delivery company's charge for an overnight package weighing in excess of one pound is given by the formula c=2.83w + 15.51, where w is the weight of package in pounds.
A 5 lb package cost 29.66
A 12 lb package cost 49.47
A 20 lb package cost 72.11
A package that cost 164.07 to mail weight about ______ lbs.
Click here to see answer by ankor@dixie-net.com(22740)

Question 179107: The points )1,3) (2,5) (8,17) (50,101) and (1000,2001) all lie on line M. The points (1,-1) (2,-3) (8,-15) (50,-99) and (1000,-1999) all lie on line N. Form the equations of both the lines and show your work.
Click here to see answer by Alan3354(69443)

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, 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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