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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 297834: Solve each system by substitution. Determine whether the equations are independent, dependent, or inconsistent.
2x-y=4
2x-y=3
Click here to see answer by Alan3354(30993)

Question 297822: translate the problem into a pair of linear equations in two variables. Solve the equations using either elimination or substitution. State your answer for the specified variable.
A sum of money amounting to $3.80 consists of dimes and quarters. If there are 20 coins in all, how many are quarters?
Click here to see answer by blwinbbbles(106)

Question 297844: Solve and determine whether the equations are independent, inconsistent, or dependent:
x+3y=2
-x+y=1
Click here to see answer by Fombitz(13828)

Question 297817: Solve each system by substitution. Determine whether the equations are independent, dependent, or inconsistent.
y = x + 4
3y - 5x = 6

Click here to see answer by Fombitz(13828)

Question 298206: Write the linear equation in slope intercept form: -8y=-x+4
Click here to see answer by richwmiller(9143)

Question 298178: i need your help on writeing the equation in standard form with interger coefficients. please, i have a test tomorrow
Click here to see answer by richwmiller(9143)

Question 298220: the following system of equations is a dependent system.
4x + 5y = 10
8x + 10y = 20
what is the correct way to write the solution?
a) 0
b) all numbers
c) 4x + 5y = 10
d) (0,4)

Click here to see answer by stanbon(57387)

Question 298223: the following system of equations is a dependent system.
x - 6y = 8
5x - 30y = 40

what is the correct way to write the solution?
a) no solution
b) x - 6y = 8
c) 0
d) all numbers

Click here to see answer by Fombitz(13828)

Question 298313: I am trying to solve this problem and would appreciate some help:
An apparel shop sells skirts for $45 and blouses for $35 The entire stock is worth $51, 750.. Half the skirts and two thirds of the blouses are sold totaling $30,600. How many skirts and blouses are left in the store.

I have tried to formulate the equations. The text example uses multiplication to get the y correspondent to zero out when the two equations are added, but I can't get the right combo..............the answers are 260 skirts, 270 blouses

this is part of my attempts

45x+35y=51,750
.50(45x)+.66(35y)=30,600

22.5x+23.33y=30,600

Click here to see answer by richwmiller(9143)

Question 298597: Write a system of two equations in two solutions for each problem. Solve each system by substitution.
Jay Lenos's garage. Jay Leno's collection of cars and motorcycles totals 187. When he checks the air in the tires he has 588 tires to check. How many cars and how many motorcycles does he own? Assume that the cars all have four tires and the motorcyles have two.
Click here to see answer by stanbon(57387)

Question 298760: Need help in solving this equation by addition
2y + z = 4
x -3y + 2z =9
-y =3
Click here to see answer by Alan3354(30993)

Question 298763: Using the Gauss-Jordan elimination method, solve the following linear system.
You can use a calculator or Excel Minverse, Mmult to get your answer
- 10 x + 14 y + 3 z = 74
+ x + 17 y + 9 z = 85
- 13 x - 8 y + 3 z = 14

Click here to see answer by Edwin McCravy(8909)

Question 298812: Write a system of two equations in two unknowns.
Spike averaged 45 mph driving from Rochester to Syracuse and 49 mph driving from Syracuse to Albany. If he drove a total of 237 miles in 5 hours, then how far is it from Syracuse to Albany?
Click here to see answer by Stitch(352)

Question 298851: between them, kristen and brad have 68 cousins. brad has 10 more cousins than kristen. how many cousins does kristen have?
a) 42
b) 29
c) 34
d) 39
Click here to see answer by user_dude2008(1861)

Question 298853: two number have a sum equal to 50. their difference is 16. to figure out what the numbers are, you mustfirst identify the variables. what are the variables in this problem?
a) the sum and difference of the numbers
b) the 2 numbers
c) the difference of two numbers is 16
d) the numbers sum to 50
Click here to see answer by user_dude2008(1861)

Question 298859: Sara and her sister Emily both collect charms for their charm bracelets. Together, they have 42 charms. Emily has 2 more charms than Sara. To figure out what the number of charms each girl has, you must first identify the variables. What are the variables in the problem?
a)Emily has a more charms than Sara; how many charms Sara has
b)together they have 42 charms; Emily has 2 more charms than Sara
c)together they have 42 charms; how many charms Emily has
d)how many charms Emily has; how many charms Sara has
Click here to see answer by user_dude2008(1861)

Question 298834: In the problem 3x+4y=6 5x+2y=-4 how do you know that you need to multiply by -2?

Click here to see answer by TX911(36)

Question 298834: In the problem 3x+4y=6 5x+2y=-4 how do you know that you need to multiply by -2?

Click here to see answer by Alan3354(30993)

Question 298889: graph the equation using intercepts for this question. -x-3y=3
Click here to see answer by checkley77(12569)

Question 299016: Please Find the slope and y-intercept of the line with the given equation.
6x-2y=24
Slope=______
Y-intercept=_______
Click here to see answer by stanbon(57387)

Question 298963: I am having trouble solving this problem because of all the negatives. Could someone help me with what all the steps are?
2(x-6)=5-{2x-[4(x-3)-5]}
Thanks!
Click here to see answer by Earlsdon(6287)

Question 299019: Word problem that I'm not sure how to write: The sales representative informs you that there are two floor plans still available, and that there are a total of 72 houses available. Use x to represent floor plan #1 and y to represent floor plan #2. Write an equation that illustrates the situation.
Click here to see answer by stanbon(57387)

Question 299025: Find the slope and y-intercept of the given equation.
6x-2y=24
Slope:_______
Y intercept:______
Thanks a bunch!
Click here to see answer by nerdybill(6962)

Question 299040: Suppose that you have found two different solutions for a system of two linear equations. How many solutions must the system have?
Click here to see answer by stanbon(57387)

Question 299039:
-x-y=8 2x-y=-1

Click here to see answer by checkley77(12569)

Question 299038: The charge for mailing a first class letter to Canada using the United States Postal Service is C= 0.25x + 0.35 where C is the charge in dollars and x is the weight of the letter in ounces. How many ounces can be mailed for $2.35?
Click here to see answer by checkley77(12569)

Question 299044: solve each linear system by subtracting the equations....
1) -x-y=8 2x-y=-1
2) x+y=-7 3x+y=-9
3) x+3y=19 x-y=-1
4) 3x-3y=-15 3x+3y=3
AND MORE TO ASK THANKYOU

Click here to see answer by checkley77(12569)

Question 299043: solve each linear system by subtracting the equations....
1) -x-y=8 2x-y=-1
2) x+y=-7 3x+y=-9
3) x+3y=19 x-y=-1
4) 3x-3y=-15 3x+3y=3
AND MORE TO ASK THANKYOU

Click here to see answer by checkley77(12569)

Question 299365: Solve the linear system by graphing.!

3y+2x=4
2y-6x=-12
Click here to see answer by oberobic(2304)

Question 299401: Please help: Find the values of x and y that solve the following system of equations:
5x + 7y = -1
7x + 3y = -15
Click here to see answer by jim_thompson5910(28598)

Question 299407: Please help: Find the values of x and y that solve the following system of equations:
4x-7y = 4
5x+2y = 5
Click here to see answer by jim_thompson5910(28598)

Question 299353: i need to know y and x i found x=-3 i cant find y
the problem is
-4x-3y=3
-2x+5y=21
Click here to see answer by jim_thompson5910(28598)

Question 299460: If it takes 110 minutes to cook a 4 pound turkey and it takes 230 minutes to cook a 10 pound turkey write a linear equation for it.
Click here to see answer by TheProdicalSon(33)

Question 299464: If it takes 110 minutes to cook a 4 pound turkey and it takes 230 minutes to cook a 10 pound turkey write a linear equation for this
Click here to see answer by checkley77(12569)

Question 299523: Find an equation of ther line that contains the point (1,0) and is perpendicular to 2x + y = -4
Click here to see answer by Alan3354(30993)

Question 299545: I need to find the particular solution and general solution for the following problem
x-4y+z=3
x+8y-z=10
Click here to see answer by Alan3354(30993)

Question 299576: Translate the problem into a pair of linear equations in two variables. Solve the equations using either elimination or substitution. State your answer for the specified variable.
A child's bank contains $2.24 in pennies and nickels. If the number of pennies is 40 less than 3 times the number of nickels, then how many pennies are in the bank?

Click here to see answer by dabanfield(803)

Question 300221: find the values of x and y solve the fllowing system of equations:
-4x+3y=17
-7x+9y=11
Click here to see answer by amoati(11)

Question 300938: which way do u shade if it is true?
Click here to see answer by Fombitz(13828)

Question 300690: The variable z varies jointly as the square of x and the square root of y. If z=7.2 when x=3 and y=16, find z when x=5 and y=4.
I know that there are a system of equations that could be used to solve this word problem, but I am at a loss for where to start and I can't seem to see the connections between the variables.
Click here to see answer by ankor@dixie-net.com(15660)

Question 301281: Write the equation of the line, with the given properties, in slope-intercept form.
Slope = -2, through (-6, -4)
Click here to see answer by checkley77(12569)

Question 301458: Use a table of trigonometric values to find the angle θ in the right triangle in the following problem. Round to the nearest degree, if necessary.
tan θ = ? O = 9 A = 15
Click here to see answer by solver91311(16897)

Question 301723: The sum of two numbers is 50 and the difference is 22 . What are the numbers?
Click here to see answer by Fombitz(13828)

Question 301745: solve each system using the substituion method.
X+y=9
y=x+1
Click here to see answer by Fombitz(13828)

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