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

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Question 1002617: Which equation is the equation of a line that passes through (�10, 3) and is perpendicular to y = 5x � 7? (1 point)
y = 5x + 53
y = �1/5x � 7
y = �1/5x + 1
y = 1/5x + 5

Click here to see answer by Cromlix(4381)

Question 1002638: what is the substitution solution to x+y=3 and y=x+3
Click here to see answer by ikleyn(52782)

Question 1002707: Please help me solve this by substitution
x+6y=9
2x+5y=4

Click here to see answer by Fombitz(32388)

Question 1002707: Please help me solve this by substitution
x+6y=9
2x+5y=4

Click here to see answer by person24(13)

Question 1002806: 5x+y=21
4x+3y=8. Solution as an ordered pair?
Click here to see answer by MathLover1(20850)

Question 1002886: Is the ordered pair (2,-3) a solution of the equation 8x-3x=7? I got no for the answer but just wanted to double check. I subtracted 8x-3x=5x. So 5x=7 and plug in 2 for x so 5x2=10. 10=7 so they're not equal.
Click here to see answer by Alan3354(69443)

Question 1002987: I need help on linear equations with fractions, especially this question: -5+x/22=1. Please help!
Click here to see answer by ikleyn(52782)

Question 1002986: A merchant mixes some gum worth $3.50 per pound with some lollipops worth $1.00 per pound. There are 10 more pounds of lollipops than the gum. If the total value of the mixtures is $28, how many pounds of each are there.
Click here to see answer by josgarithmetic(39617)

Question 1003111: The sum of the digit of a certain two digit number is 7. Reversing its digits increases the number by 9. What is the number?
Click here to see answer by solver91311(24713)

Question 1003344: what is the ordered pair for 2x+4y=4 and 5x+3y=-16

Click here to see answer by stanbon(75887)

Question 1003341: 5x=10y
How would you graph them? Thank you
Click here to see answer by mananth(16946)

Question 1003639: Graph the system below and write its solution
3x+y=-6
y=-1/2x-1
Click here to see answer by mananth(16946)

Question 1003736: A pet store owner has x Php50 per kilo dog food and y Php75 per kilo dog food, which he will mix to make 25 kilos of Php60 per kilo dog food. How many kilos of each should be used?
Click here to see answer by ikleyn(52782)

Question 1003807: for what values of m and n is (5,-3) the solution for (x,y)?
The equations being:
mx-y=23
nx+y=12
Can you please explain this question?

Click here to see answer by Edwin McCravy(20056)

Question 1003847: Please help me with this problem. After doing the problem my answers below were wrong. Show all work and steps. Thanks

Maricopa's Success scholarship fund receives a gift of $ 170000. The money is invested in stocks, bonds, and CDs. CDs pay 3.25 % interest, bonds pay 2.2 % interest, and stocks pay 7.3 % interest. Maricopa Success invests $ 10000 more in bonds than in CDs. If the annual income from the investments is $ 7325 , how much was invested in each account?
Maricopa Success invested $ 63500 in stocks.
Maricopa Success invested $ 73500 in bonds.
Maricopa Success invested $ 33000 in CDs.

Click here to see answer by Boreal(15235)

Question 1003996: What value for y will make the equation true?
4(y-2)+6y = 2(3y +2)
Click here to see answer by fractalier(6550)

Question 1004066: How do you graph y<5
My teacher didn't explain it too me

Click here to see answer by fractalier(6550)

Question 1004066: How do you graph y<5
My teacher didn't explain it too me

Click here to see answer by Alan3354(69443)

Question 1004118: Write g in terms of f. Then describe the transformation from the graph of f to the graph of g.
f(x)= 5x-2 g(x)= x-2
Click here to see answer by jim_thompson5910(35256)

Question 1004118: Write g in terms of f. Then describe the transformation from the graph of f to the graph of g.
f(x)= 5x-2 g(x)= x-2
Click here to see answer by stanbon(75887)

Question 1004178: Why is 3x-19y , x+9y not a system of linear equation?
Click here to see answer by jim_thompson5910(35256)

Question 1004179: How to solve this kind of problem/equation in Linear equation with 4 variables;
w-2x+3y+4z=12
2w+x+4y-2z=8
3w+3x-4y+3z=12
5w-4x+5y-6z=30
Click here to see answer by fractalier(6550)

Question 1004413: I Need to put (o,3) and (2,-3) in an equation in standard form. Please help!
Click here to see answer by stanbon(75887)

Question 1004346: Linear Systems with Addition or Subtraction 2x+−y = 10
3x+y = −5
Click here to see answer by fractalier(6550)

Question 1005179: Find the coordinates of the vertices, even if they are not part of the solution
y-3<0
y<2x+1
3y-x>=3
Click here to see answer by stanbon(75887)

Question 1005383: How would you solve the quadratic linear system algebraically which is y=4x^2-6x-10 and y=25-2x?
Click here to see answer by josgarithmetic(39617)

Question 1005383: How would you solve the quadratic linear system algebraically which is y=4x^2-6x-10 and y=25-2x?
Click here to see answer by macston(5194)

Question 1005795: Solving a linear system with substitution: -12x+y=15, 3x+2y=3
Click here to see answer by fractalier(6550)

Question 1005860: A Fraction has a value 3/4. If 4 is added to the numerator and the denominator is decreased by 2, the resulting fractions have the value 6/7. What is the original fraction?
Click here to see answer by josgarithmetic(39617)

Question 1005864: A hospital need 80 L of a 12% solution of disinfectant. How many liters of a 33% solution and a 5% solution should be mixed to obtain this 12% solution? Fill in the following table and solve for x and y.
PERCENT PER LITER X Number of Liters = Amount of disinfectant
33% solution 0.33 X x = 0.33x
5% solution 0.05 X y =
12% mixture 0.12 X 80 =
Click here to see answer by josgarithmetic(39617)

Question 1005861: The average(mean) of two numbers is 82 and their range(difference) is 6. Find these numbers.
Click here to see answer by josgarithmetic(39617)

Question 1005877: What values of a and b would make the equation shown have infinitely many
solutions?
3x = ax+ b
Click here to see answer by Theo(13342)

Question 1005432: 3x+y+4z=0
5x+y+3z=1
x-3y-4z=5
Click here to see answer by Fombitz(32388)

Question 1005613: Write a linear equation that will generate a table of monthly weights for a baby weighing 6.8 pounds at birth and gaining and average of 1.5 pounds per month
Click here to see answer by fractalier(6550)

Question 1005987: solve by elimination -x + y = 5 x - 5y = -9
Click here to see answer by Alan3354(69443)

Question 1005988: solve by elimination -x + y = 5 x - 5y = -9
Click here to see answer by Alan3354(69443)

Question 1005998: Please help me solve the system by elimination.
I am not sure how to approach this and would like help solving with examples, so I can use it on other problems I am currently working on,
Thank you
3x=4y=17
8y=11-9x

Click here to see answer by Alan3354(69443)

Question 1006008: Please Help, I cant move forward
3x=4y+17
8y=11-9x
Click here to see answer by solver91311(24713)

Question 1006031: For the graph shown, select the statement that best represents the given system of equations.
4y + x = 2
8y + 2x = 4

A.
coincident

B.
consistent and independent

C.
inconsistent

D.
not enough information
Click here to see answer by ikleyn(52782)

Question 1006056: 92xyz-289yz+92x+92z-289

Click here to see answer by fractalier(6550)

Question 1006039: A person spent Rs 345 in buying pens and copies.if each pen cost Rs 5 and copy Rs 2.50 and if the total number of things was 108,how many of each did he buy?
Click here to see answer by rfer(16322)

Question 1006334: A jar contains nickles and pennies. If there are 56 coins in all and the total value is $1.52, How many nickles are in the jar?
Help?
Click here to see answer by Edwin McCravy(20056)

Question 1006426: The solution set of the following pair of linear equations is
x + 2y = 6; x � y = 9
A) {(6, 0)}
B) {(0, 3)}
C) {(8, -1)}
D) {(9, -1)}
E) None of these
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, 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