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

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Question 1106021: -8=-2y-x
Click here to see answer by Alan3354(69443)

Question 1106080: Which of the following would be the best first step for solving the system of equations by elimination?
� 6.3x + 7.2y = 5.4
� 5.6x + 6.4y = 4.8
a) Multiply both equations by 10.
b) Multiply both equations by 100.
c) Divide the first equation by 9.
d) Divide the second equation by 8.

Click here to see answer by Alan3354(69443)

Question 1106184: A chemist needs to make 200L of a 62% solution by mixing together an 80% solution with a 30% solution. How much of each solution should she use?
Click here to see answer by josgarithmetic(39617)

Question 1106192: You have to travel 1170 miles. In two hours, you travel 130 miles, and in five hours, you travel 325 miles. How long will it take you to complete your trip?
Click here to see answer by josgarithmetic(39617)

Question 1106220: Simultaneous Equations
3x+2y=16
x+2y=12
Click here to see answer by Alan3354(69443)

Question 1106301: F3(x) = x - 4
G3 (x) = 5x + 8
Use each of the operations: addition, subtraction, multiplication and division.
Record all of your work, please. Thank you!
Click here to see answer by ikleyn(52782)

Question 1106356: Solve for y: 4x+3y=84x+3y=8 and x−2y=−13x−2y=−13
Click here to see answer by Alan3354(69443)

Question 1106564: Y=1/4x + 2/9. I need the inverse function
Click here to see answer by dkppathak(439)

Question 1106564: Y=1/4x + 2/9. I need the inverse function
Click here to see answer by davidb52(7)

Question 1106594: ``Line L, passes through points P(n, 4) and Q(1 2), Line L, passes through points R(4, 3) and S (1, 5). a) What is the value of n if the lines are parallel? b) If the lines are perpendicular, what is the value of n?''.
.....
Click here to see answer by josgarithmetic(39617)

Question 1106667: Which expression can be substituted for y in the top equation of the following system to solve the system by substitution? What is the solution?
3x−5y=13x-5y=1
3x−y=−7
My choices are as follows:
1) 7/3x, (−3/26, 173/26)
2)3x+7, (−3,−2)
3) 3/5x+1/5, (−3,−2)
4) −3x−7, (−17/9,4/3)
Thank you again and the "/" symbol is meaning "over" since i can not type it.
Click here to see answer by Alan3354(69443)

Question 1106664: solve the system of equations:
verify the solution by replacing the values in the original equations;
y= 3x-7
y= -x+9
I am just not understanding what they want done.
Click here to see answer by ikleyn(52782)

Question 1106682: Solve the system of equations verify the solution by replacing the values in the original equations
Y=-x
Y=-1/3x+3

Can you please help me with this? Is X = to-1
Click here to see answer by ikleyn(52782)

Question 1106669: Which expression can be substituted for x in the top equation of the system to solve the system of equations by substitution? What is the solution?
-3x + 2y = 2
x + 5y = 22
Thank you, and each "/" symbol is meaning a number over a number since i can't type it that way. Thank you ! Of the 4 choices one is correct:
1)-5y + 22, (4,2)
2)-5y + 22, (2,4)
3)5y + 22, (-4,3)
4)5y + 22, (2,4)
Click here to see answer by addingup(3677)

Question 1106666:
Which expression can be substituted for y in the top equation of the system to solve the system by substitution?
5x + 4y = -2
x - y = 3
Thank you, my choices are as follows:
1) 3 - x
2) −5/4x−1/2
3) 3x - 9
4) x - 3
Click here to see answer by josgarithmetic(39617)

Question 1106665: Which expression can be substituted for y in the top equation of the following system to solve the system by substitution?
−3x+6y=5
3x−y=2
My choices are as follows and the "/" symbol is meaning over

−3x+2-3x+2
1/2x+5/6
−1/2x+6/5y
3x−2
Click here to see answer by josgarithmetic(39617)

Question 1106663: Which expression can be substituted for x in the top equation of the following system to solve the system by substitution? What is the solution?
−2x−3y=−13
x+y=6
The choices are :
1) −y+6, (5,1)
2) y+6, (-1/5 ,1/5) that's meaning 1 over neg 5,and 1 over 5

3)-3/2y+13/2 (5,1)
4) 6−y, (1,5)

Click here to see answer by Theo(13342)

Question 1106737: When you graph a system of equations, you get two parallel lines. What solution does this yield?
Click here to see answer by Alan3354(69443)

Question 1106855: Javier invests money in two simple interest accounts. He invests twice as much in an account paying 13% as he does in an account paying 6%. If he earns $104.00 in interest in one year from both accounts combined, how much did he invest altogether?
Total Principal in Both Accounts = $
Click here to see answer by JThomson(12)

Question 1106861: Kelly pays 10% more each month in rent than Cici, and together they pay $1050.00 per month. How much does Kelly pay per month?
Click here to see answer by JThomson(12)

Question 1106903: determine the value of k for which the system of linear equations has infinitely many solutions. then find all the solutions corresponding to this value of k
3x+4y=12
x+ky=4

Click here to see answer by greenestamps(13200)

Question 1107155: How many solutions does the following system have?
y=−12x+4
4x+8y=16
Click here to see answer by ikleyn(52782)

Question 1107176: The Johnson Farm has 500 acres of land allotted for cultivating corn and wheat. The cost of cultivating corn and wheat (including seeds and labor) is $44 and $32 per acre, respectively. Jacob Johnson has $18,400 available for cultivating these crops. If he wishes to use all the allotted land and his entire budget for cultivating these two crops, how many acres of each crop should he plant? (Let x and y denote the number of acres of corn and wheat, respectively.)
Click here to see answer by addingup(3677)

Question 1107348: 3)Carlo has a circular window with an area of aproxenately 4069.44cm. Find the radius of the window?
4)what is the area of a circular garden whose diameter is 15 meters?
Click here to see answer by Alan3354(69443)

Question 1107349: 1)A circular basement has a radius of 6m. It will cost Php per square meter to pave the basement with brinks, what will be the total cost be?
2)Lyn wants to refinish a circular table that is 2.4 meters in diameter.It the refishing cost Php255 per square meter,how much she will be spend?
Click here to see answer by ikleyn(52782)

Question 1107402: You buy a total of 50 turkey burgers and veggie burgers for $90. You pay $2 per turkey burger and $1.50 per veggie burger. Write and solve a system of linear equations to find the number of turkey burgers and veggie burgers you can buy.
Click here to see answer by josgarithmetic(39617)

Question 1107612: The admission fee of a theater is $2.50 for adults and $1.25 for children. On a certain day, 700 people went to the theater for a concert and $1375 was collected. How many children and how many adults attended the concert?
Click here to see answer by Boreal(15235)

Question 1107664: Amy has $20 in her savings account and is adding $10 every week. Jim has $180 in his savings account but has to take out $30 every week. Write the equation that represents the amount that each has in their account. Don't forget to define your variable.
Click here to see answer by Theo(13342)

Question 1107720: The value of a number of dimes and quarters is $1.25. If the number of dimes was
doubled and the number of quarters was increased by 5, the value would be $3.00.
How many dimes and quarters are there?
Click here to see answer by josgarithmetic(39617)

Question 1107708: What is a word problem for 3x+y=38 and 4x+3y=71.50
Click here to see answer by AnlytcPhil(1806)

Question 1107708: What is a word problem for 3x+y=38 and 4x+3y=71.50
Click here to see answer by ikleyn(52782)

Question 1107670: how to find the value of x in the following,
01.5(x+2y)-(3x+11y)=4
7x-9y-3(x-4y)=32

02. 3x=7+y
5x=9y+41
Click here to see answer by rumessa(13)

Question 1107810: Tell whether the lines for each pair of equations are parallel, perpendicular, or neither.
y = -2x + 4 & -5x + 10y =5
Click here to see answer by josgarithmetic(39617)

Question 1107889: How do you solve this system by using elimination?
2x-5y=-25
3x+4y=20
Click here to see answer by Alan3354(69443)

Question 1107889: How do you solve this system by using elimination?
2x-5y=-25
3x+4y=20
Click here to see answer by stanbon(75887)

Question 1107915: A company produces graphing calculators for $26 and sells each one for $132. The fixed costs are $47,700. Determine the number of calculators that must be produced and sold to break even.

Click here to see answer by ikleyn(52782)

Question 1107923: Find the x and y-intercepts of in terms of the constants a, b and c for these relations.
ax+by=c

Click here to see answer by Theo(13342)

Question 1107938: A publisher printed acertain number of book if He Has Printed 2000 copies more each copy would have cost of rupees 5
less. If he had printed 1600 copies less then each copy would have cost him rupees 10 more . Find the number of copies printed and the cost of each book
Click here to see answer by ikleyn(52782)

Question 1108065: Graph the system of equations on your graph paper to answer the question.
{y=x−4y=-x+6

What is the solution for this system of equations?
Enter your answer in the boxes.
Click here to see answer by Alan3354(69443)

Question 1108076: Solve the system of linear equations by adding or subtracting.

−2x + y = −7
2x − 6y = −8
Enter the solution as an ordered pair.

The solution is?
Click here to see answer by rumessa(13)

Question 1108091: What is a system of equations that has one solution at the point (4,5)?
Click here to see answer by Alan3354(69443)

Question 1108109: solve y=-6x-5
y=-2x-1
where do these two lines intersect?
your answer should be point (x,y)
Click here to see answer by josmiceli(19441)

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