Questions on Algebra: Equations answered by real tutors!

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Question 181238: Hi.
May I have some help solving each system graphically if possible?
{2x=5y-11
3x=2y
thanks
H.C.
Click here to see answer by Alan3354(30993)

Question 181720: Use Substitution to solve each system of equations. If the system does not have exactly one solution, state whether it has no solution or infinitely many solutions. 1/2x+2y=12 and x-2y=6
Click here to see answer by ankor@dixie-net.com(15652)

Question 181721: Use Substitution to solve each system of equations. If the system does not have exactly one solution, state if it has no solution or infinitely many solutions. x-5y=36 and 2x+y=-16
Click here to see answer by eperette(173)

Question 181981: 2x-(9-3x)=8x-11
Click here to see answer by jim_thompson5910(28595)

Question 181985: I am trying to help my duahgter with her pre-algebra. Her paper only states the following: y = 2x-5 x-y = 2
She does not know the formula to figure this out. I have forgotten...can you please help us?
Click here to see answer by nerdybill(6958)

Question 182011: Solve for y
8x-12y=24
Click here to see answer by jim_thompson5910(28595)

Question 182039: i am want to solve 26x= 37-2x+11
Click here to see answer by jim_thompson5910(28595)

Question 182055: 3/4x - 5= 2/3x
Click here to see answer by jim_thompson5910(28595)

Question 182077: Matrices
Hello I'm needing some help with my homework that asks me to use the matrices to solve each system of equations. If a system has no solution, so indicate.
{x-y+z=2
x+2y-z=6
2x-y-z=3
thanks
Haley
Click here to see answer by Alan3354(30993)

Question 182076: Matrices
Hello I'm needing some help with my homework that asks me to use the matrices to solve each system of equations. If a system has no solution, so indicate.
{2x-3y=16
-4x+y=-22
thanks
Haley
Click here to see answer by Alan3354(30993)

Question 182145: f = p - k ln t; solve for t
Click here to see answer by vleith(2825)

Question 180422: 1.7t+8-1.62t=.4t-.32+8
Click here to see answer by checkley77(12569)

Question 182224: Find all factors of x^2+x-12
Click here to see answer by Alan3354(30993)

Question 182224: Find all factors of x^2+x-12
Click here to see answer by josmiceli(9678)

Question 182158: Hello, I'm having some difficulty with the following problem:
Use matrices to help find a general solution of each system of equations.
{ x+z=1
x+y=2
2x+y+z=3
thanks,
H.C.
Click here to see answer by Fombitz(13828)

Question 182230: Find two real numbers that have a sum of 8 and a product of 2.
Click here to see answer by Earlsdon(6287)

Question 182253: 2x - 5 sqrt x +2 =0
Click here to see answer by stanbon(57347)

Question 182258: 7/4x=-28
Click here to see answer by checkley77(12569)

Question 182155: Hello, I'm needing some help on the following problem:
Use matrices to solve each system of equations. If a system has no solution, so indicate.
{ 2x-3y=16
-4x+y=-22
thanks
H.C.
Click here to see answer by Fombitz(13828)

Question 182219: 1/2x^2 + x -1=0

ax^2 + bx + c=0
Click here to see answer by jojo14344(1512)

Question 182330: Ok, I am having problems trying to figure out what the other 2 solutions are within this problem, I have tried using the quadratic equation formula and I get (3+sqrt71)/10 and its not correct, so could someone please help me figure this out, I would greatly appreciate it.
Here is the problem :

The equation 5x^4-3x^3-4^2 has three real solutions they are : ____ , 0 ,____
Hint: factor out common factor (yielding one solution), then maybe use quadratic equation to find the others.
Click here to see answer by stanbon(57347)

Question 182369: How do I figure out this question? If sally paints a house in 4 hours and sam does the same house in 6 hours, how long will it take them both to do the same house?
Click here to see answer by ankor@dixie-net.com(15652)

Question 182376: Solve by addition method
3/7x + 5/9y = 27
1/9x + 2/7y =7
Click here to see answer by stanbon(57347)

Question 182475: Is the following equation a function?
y=x^2-9
Thank you in advance for any help you could give me! I am not grasping the concept of functions AT ALL and it is very frustrating!! thanks again!
Click here to see answer by Alan3354(30993)

Question 182479: Well we are leanring about scientific notation and we have were we have a table and the squares are going up by one and the rubas are going up by times 2 and I need an equation
Click here to see answer by Alan3354(30993)

Question 182472: GRAPH
f(x)-x-4
Click here to see answer by tvandenberg(45)

Question 182495: a homeowner estimates that it will take her 9 days to roof her house. A professional roofer estimates that he could roof the house in 4 days. how long will it take if the homeowner helps the roofer?
Click here to see answer by HyperBrain(694)

Question 182543: Write the equation of a line in slope-intercept form with the slope of 4/5 and y-intercept (0, -5).
Click here to see answer by J2R2R(94)

Question 182540: Find the slope and the y-intercept of the line represented by the equation:
5x + y = 13
Click here to see answer by Alan3354(30993)

Question 182537: For the following equation: 3x – y = 4:
Find x if y = 2
Find y if x = 1/3

Present the solutions as ordered pairs.

Click here to see answer by Mathtut(3670)

Question 182536: Verify that the ordered pair (3, -3) is a solution to the equation
3x + 4y = -3

Click here to see answer by Mathtut(3670)

Question 182541: Write the equation of a line in slope-intercept form with the slope of 4/5 and y-intercept (0, -5).
Click here to see answer by stanbon(57347)

Question 182535: Given the following equation, solve for y
4x – 2y = 12
Click here to see answer by Mathtut(3670)

Question 182562: given: stamps of 0.5, 3, 10 dollar
Question: how many stamps from each do i need to have 100 stamps for a total of 100$
Click here to see answer by ptaylor(2048)

Question 182635: please help me solve this equations.....
1.1/2x=3

Click here to see answer by jim_thompson5910(28595)

Question 182637: please help me solve the following equations:

1. 6(x-1)=3x+x+8

2. 4(x-1)-3x=50
3. -2(x+1)= -6
Click here to see answer by jim_thompson5910(28595)

Question 182824: Write an equation that represents the number of faces in a prism in terms of the number of sides in the base of the prism
Click here to see answer by jim_thompson5910(28595)

Question 182850: a rectangular piece of cardboard is 4times as long as it is wide. you make a box by cutting squares with side length x from the corners of the cardboard and turning up the resulting flaps. write an expression involving x and the original width of the cardboard w that represents the perimeter of the base of the box. then simplify the expression. explain what the possible values of x can be.
Click here to see answer by asim(1)

Question 182893: This is a quesion of two step equations.
The perimeter of a triangle is 51cm.The lenghts of its sides are sonsecutive odd integers.find the lenghts of all three sides.
Click here to see answer by Earlsdon(6287)

Question 182891: Find the slope and the y-intercept of the equation y = 9 + 3/7x

Click here to see answer by nerdybill(6958)

Question 182916: Please help me solve this exercise;
The directions are, write an equation for each.
Passes through (4,10) and is perpendicular to the line 6x-3y=5.
I have tried midpoint and point slope formula and I am still stuck.
Look forward to hearing from you.
Click here to see answer by nerdybill(6958)

Question 181724: Use Substitution to solve each system of equations. If the system does not have exactly one solution, state if it has no solution or infinitely many solutions. .3x-.2y=.5 and x-2y=-5 thank you
Click here to see answer by stanbon(57347)

Question 182981: 3.
I have literally hundreds of questions. I am submitting only a few for help because I want to do the others on my own. My course does not show proper examples of HOW I can do these, that is why I am here.
Translate the following problems into algebraic equations. It is not required that you solve the equations; simply translate them. Identify the variables, constants, and coefficients in each equation
42 is 40% of what number?
thank you!
Click here to see answer by nerdybill(6958)

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, 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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