Questions on Algebra: Systems of Linear Equations answered by real tutors!

Tutors Answer Your Questions about Linear-systems (FREE)

Question 551780: By graphing the function on your calculator (TI-83) find the solutions of 1.2x^2 - 3.1x -4.5=0 to three decimal places. Explain how answer was obtained.
Click here to see answer by Edwin McCravy(8880)

Question 551787: Thank you for your help. I would like to know how to use the calculator to do this. By graphing the function on your calculator (TI-83) find the solutions of 1.2x^2 - 3.1x -4.5=0 to three decimal places. Explain how answer was obtained.
Click here to see answer by Edwin McCravy(8880)

Question 551791: Solve 16 + 3 =5
________________
x+5 x-2
Click here to see answer by Alan3354(30975)

Question 551788: Janie's Crafts produces bracelets. The weekly profit the company receives for selling x bracelets is given by P9x)= -0.01x^2 + 50x - 30,000; P(x) is the profit. Because you cannot sell a negative number of bracelets, for the following questions only consider the function for x> 0.
Use your graphing calculator to graph P(x), where you should consider a y window size around + 40,000. (T83)
hOW MANY BRACELETS NEED TO BE MADE TO MAXIMIZE PROFIT?
What is the max profit?

Click here to see answer by richard1234(5390)

Question 547475: 2x+y=5 2x+y=1
Click here to see answer by jim_thompson5910(28493)

Question 551778: Solve x^2 + x - 42=0
x= Is the answer 6?
Click here to see answer by MathTherapy(1421)

Question 551778: Solve x^2 + x - 42=0
x= Is the answer 6?
Click here to see answer by jim_thompson5910(28493)

Question 551996: Solve each of these systems using the substitution method.
2x + 3y = -4
x - 2y = 5
Any help will be Greatly Appreciated!
Click here to see answer by 10301650(32)

Question 552418: x+2y=-1
2x-3y=12
Solve using substitution.
Click here to see answer by stanbon(57228)

Question 552429: 2x+3y=9
3x+4y=5
Solve using substitution
Click here to see answer by mananth(12270)

Question 552489: Arnel invest some of his savings at 4 percent per year and an equal amount at 7 percent per year.His income totals ₱33 000 a year.How much did Rico invest at each rate?
Click here to see answer by JBarnum(2044)

Question 552628: Algebra: How would you plot the second line and why would you plot it like that is there a rule?

X -> 3X+2
-2 = -4
-1 = -1
0 = 2
1 = 5
2 = 8

I get that the first number line will have -2,-1,0,1,2 on it but what about the 2nd one?
Click here to see answer by jim_thompson5910(28493)

Question 552680: 2x=-4y+10
6y=-3x+12
Is it no solution?

Click here to see answer by jim_thompson5910(28493)

Question 552787: 13. Write the slope-intercept equation for the line that passes through (-5, -8) and is perpendicular to 10x – 6y = -11.
Click here to see answer by mananth(12270)

Question 552815: how do system of equations using substitution x+y=4 2x+3y=9
Click here to see answer by jim_thompson5910(28493)

Question 552820: Need to know how to work out this problem! 3x+y=8
-2x-y=6
Click here to see answer by mananth(12270)

Question 552820: Need to know how to work out this problem! 3x+y=8
-2x-y=6
Click here to see answer by Alan3354(30975)

Question 552831: I have homework for Algebra. I tried everything I know how to do. Can you help by showing me how to do it? The problem is -.3x+y=.5 , .5x-.3y=1.9 I know the answer because it was given to me by the yeacher. I just have to show how to do it. Please help!!!!!
Click here to see answer by stanbon(57228)

Question 553173: How to solve by elimination?
x+y=7
x+3y=11
Click here to see answer by stanbon(57228)

Question 553397: How do you put 3y=18=-8x+3 in slope intercept form ? can you please tell me in details how you got the answer. thank you soooooo much for your time
Click here to see answer by mananth(12270)

Question 553405: Good evening ,
I need to know how to put this equation : 3y+18=-8x+3 in slope-intercept form. Can you please put in detailed information how you put it in slope intercept form .
Click here to see answer by Alan3354(30975)

Question 553637: Use either elimination or substitution to find the solutions (if any)
Graph the two lines, labeling the x-intercepts, y-intercepts, and points of intersection

y = 2x + 3 and y = -x – 4
Click here to see answer by mananth(12270)

Question 553664: peter decides to mix grades of gasoline in his truck. he puts in 12 gallons of regular and 7 gallons of premium for a total cost of $48.21. If premium gas cost .21 cents more per gallon, what was the price of each grade of gasoline?
Click here to see answer by josmiceli(9654)

Question 553677: find the equation of a line whose intercepts are twice of the line 3x-2y-12=0

Click here to see answer by mananth(12270)

Question 553855: What is the answer to 17+3x=-3 ?????
Click here to see answer by Alan3354(30975)

Question 553875: Please help me solve the below:
Bruce has $5.15 in dimes and quarters. He has 8 more quarters than dimes. How many quarters does he have ??
thank you !!!!!
(HS Freshman struggling in Algebra)
Click here to see answer by TutorDelphia(193)

Question 553899: 3x-y=7
9x-3y=21
i can use any method and i would like easy steps thanks
Click here to see answer by Alan3354(30975)

Question 554059: need help solving linear equation blow:
x=2y=4
3x-y=5
Click here to see answer by Alan3354(30975)

Question 554062: 4x-3y=-5
2x-y=-7
Click here to see answer by Maths68(1474)

Question 554099: what does 5/3w=-10 equal?

Click here to see answer by Alan3354(30975)

Question 554099: what does 5/3w=-10 equal?

Click here to see answer by richard1234(5390)

Question 554181: 5 rolls + 30 balloons cost $18.60 What is the cost of each roll and each balloon?
Click here to see answer by stanbon(57228)

Question 554196: How many solutions does the system y=-7x+3 and y+7x=10 have?
Click here to see answer by saifoo.khan(162)

Question 554120: Eight years ago, Albert was 3/4 of Bilbos age. in 22 years he will be 9/10 of Bilbos age. How old is Bilbo now?
Click here to see answer by ankor@dixie-net.com(15628)

Question 554302: Which variable would you isolate in order to solve the system below by substitution?
8x - y = 11
3x + 4y = 18
Click here to see answer by Alan3354(30975)

Question 554380: x=6-4y
2x-3y=1
i dont know how to do these and i have 20 missing assignments please help!
Click here to see answer by Maths68(1474)

Question 554395: may you help me solve 2x+3y=13 3x+5y=10
Click here to see answer by Maths68(1474)

Question 554631: how do you solve the linear system?
2x+3y=14
-x+5y=19
Click here to see answer by Alan3354(30975)

Question 554670: solve each system by substitution
here is the problem:
y=x-3
y=-2x+6
Click here to see answer by jim_thompson5910(28493)

Question 554866: Solve: -12x-3y=-15
4x+y=5
Click here to see answer by jim_thompson5910(28493)

Question 554869: 5x+3y=-11
7x-2y=13
Click here to see answer by jim_thompson5910(28493)

Question 555002: Ricks paint store sells a special shade of pink paint (Ricky's Blush) which can be made from red paint and white paint. The amount of red paint should be three times the amount of white paint. How much of each kind of paint is needed to make 264 gallons of Ricky's Blush?
Click here to see answer by Maths68(1474)

Question 554997: Alices restaurant has a total of 205 seats. Th enumber of seats in the non-smoking section is 73 more than twice the number of seats in the smoking section. How many seats are in each section?
Click here to see answer by Maths68(1474)

Question 555341: 8x+5y-4z+9y+13z-4z
Click here to see answer by jim_thompson5910(28493)

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