# Right now we're doing systems of Linear Equations in Three Variables. It says to solve the following system: x - y + 3z = 4 x + 2y - z = -3 4x + 3y + 2z = -5 Whatever

37,748 results
1. ## Math

Lesson 8: Systems of Linear and Quadratic Equations Check my work 1. Solve the system of equations. y = 2x^2 - 3 y = 3x - 1 a. no solution b. (-1/2, 5), (2, -5/2) c. (-1/2, -5/2), (2,5)*** d. (1/2, 5/2), (2, 5) 2.how many real number solutions does the

2. ## Math

PLEASE CHACK MY ANSWER!!! Discussion for Applications of Linear Systems When solving a system of equations, how do you determine which method to use? My answer: I determine which method to use by looking at the equations. If both equations are in

3. ## Algebra

What are 3 ways to solve system of linear equations in two variables?

4. ## Algebra I DONT KNOW HOW TO DO 3 VARIABLES

Solving Linear Equations and Inequalities Solve by eliminating x (this is solving 3 linear equations) then substitute to the other two equation x + y + 5z =2 (1) 4x - 3y + 5z =3 (2) 3x - 2y + 5z=1 (3) my teacher gave me the answer she said the solution set

5. ## Math

Use linear combinations to solve the system of linear equations. 5x=4y-30 2x+3y+-12

6. ## Math, Algebra, Graphing Systems of Linear Equation

I'm confused about graphing or solving the linear equations for slope/intercept. Here is what I solved: 3x+2y=-6 X-4y=-16 2y= -3x-6 -4y=1x-16 Y=-3/2+3 Y=+1/4+4 ------------- My answer for graphing the systems for the lines to intersect...well, they didn't

7. ## Alg 2

Today we learned how to solve systems of equations with 3 variables, however my teacher didn't go over how to do a problem where not every single equation in the system has the 3 variables. Can someone point me to a place that explains this? the kind of

8. ## algebra 1

what are some methods of solving systems of linear equations

9. ## math

Determine the solution of the following systems of linear equations using elimination. 2x + 3y = 7 x – 2y – 4 = 0

10. ## Algebra

What similarities and differences do you see between functions and linear equations studied in Ch. 3? Are all linear equations functions? Is there an instance when a linear equation is not a function? Support your answer. Create an equation of a linear

11. ## Algebra 2

1.) Write a system of equations that has NO solution. 2.) If you wanted to eliminate the y variables in the system of equations below, what would you multiply the first and second equations by?( Do not solve the equation) 2x-3y=8 7x-4y=11

12. ## algebra

systems of linear equations in 3 variables 1/3x-2/3y+z=0 1/2x-3/4y+z=1/4 -2x-y+z=1 every time i do it is wrong and i cannot figure out what I'm doing wrong please help!!!

13. ## Math

Could someone give me an example of a linear eqution using elimination to solve the systems of equations?

14. ## algebra 2

how do u solve a system of linear equations in three variables? for example this problem Ex.1 2x-2y+z=3 5y-z=-31 x+3y+2z=-21

15. ## math

How do you solve system of equations and tell if they're consistant and independant,consistant and dependent,and inconsistant? If you find no solutions then the system is inconsistent. Suppose you have N variables and M equations (N larger than or equal to

16. ## Pre-Calculus

Could you please explain how to use a matrix (matrices) to solve a system of linear equations (two variables)? My book doesn't explain it in a way I can understand. Please and thank you.

17. ## quick question regarding equations

I know there are methods out there but what do you think is the best or easiest method(s) of solving a system of equations. Depends on the coefficients of the equation. If in one of the equations I can solve for one of the variables without having to

18. ## Algebra

Solving Linear Equations - Elimination Write whether each of these systems of equations has a common solution or not. Explain y = -x + 2 Y = 2x + 1 If you show me one and explain it, then I can probably do the rest...Thanks

19. ## algebra

In the magic square shown (I'll type it out), the sum of the numbers in each row, column, and diagonal are the same. Five of these numbers are represented by v,w,x,y, and z. Find y + z. Here's what the magic square looked like. I'll type semi-colons to

20. ## Maths

Linear equations in two variables Draw a graph 1.x+y=9 2.2x+y=6 3.x-y=4 4.y=4x 5.2x-y=4 6.3x+y=4 7.6x-5y=1 8.3x=y+4 9.x=5y 10.x-5y=7

21. ## math

Hello! I need help with a math problem, this is the question: The tallest freestanding structure in the Canada is the CN tower, located in Toronto, Ontario. It is 390 m taller than the tallest church tower in the world, located in Germany. The sum of their

22. ## math

Determine the solution of the following systems of linear equations using elimination. Briefly explain your work. 3x +2y = 19 2x – 3y = -6

23. ## MAT 116 Algebera 1A

What similarities and differences do you see between functions and linear equations studied in Ch. 3? Are all linear equations functions? Is there an instance when a linear equation is not a function? Support your answer. Create an equation of a nonlinear

24. ## algebra

I do not know how to solve the following systems of linear equations in 3 variables 1) x-2y+z=7 2) 2x+y-3z=-1 3) x-4y+3z=13

25. ## Algebra II

Right now we're doing systems of Linear Equations in Three Variables. It says to solve the following system: x - y + 3z = 4 x + 2y - z = -3 4x + 3y + 2z = -5 Whatever I try with this problem (and the others like it) it comes out wrong. I've had about one

26. ## Algebra 2

Solving systems of linear equations in three variables. Ok so i don't really totally get these problems. Can you help me solve this one? and explain everything please? 2x+3y=6+z x-2y=-1-z 3x+y=-1+3z

27. ## algebra

systems of linear equations in 3 variables 1/3x-2/3y+z=0 1/2x-3/4y+z=1/4 -2x-y+z=1

28. ## Algebra

Solving systems of linear equations in 3 variables... 1) 3x-2y+2z=1 2) 2x+5y-5z=7 3) 4x-3y+z=-3 I combined 1 and 3 to get -5x+4y=7 And then i combined 2 and 3 to get -13y+11z=-17. Can that be right? how would you combine those two equations?

29. ## to annonymus can you help me with math

How do i solve inequalitites with three variables. I still can't figure it outplease help. x+y=1 y-z=-3 2x+3y+z=1 the answers are 3,-2,1 how do get there by solving linear equations with three variables. 5x-2y-z=2 -y+2z=11 x+y+z=-3

30. ## College Algebra

Translate the problem into a pair of linear equations in two variables. Solve the equations using either elimination or substitution. State your answer for both variables. The perimeter of a rectangle is 72m. If the width were doubled and the length were

31. ## algebra

Can anyone help me to understand algebra? Right now I am working on Systems of Linear Equations in Two Variables and I do not understand any of it. Thank you.

32. ## science

1 A ……... is a rectangular array of numbers that are enclosed within a bracket . horizontal set vertical matrix 2 When the numbers of rows is equal to the numbers of columns equal to 'n'. Where m=n. Then is called….. a square matrix a column

33. ## algebra

Translate the problem into a pair of linear equations in two variables. Solve the equations using either elimination or substitution. State your answer for both variables. In a basketball game, Will scored 26 points, consisting only of three-point shots

34. ## College Algebra

Translate the problem into a pair of linear equations in two variables. Solve the equations using either elimination or substitution. State your answer for both variables. An orchard operator must dilute 11 quarts of a 60% insecticide solution by adding

35. ## algebra 1

Solve the following systems of linear equations using algebraic method. 1)3y=11-2x 3x=y-11 2)8x-6y=14 12x-9y=18

36. ## algebra 1

Solve the following systems of linear equations using any algebraic method.If possible,check your solution. 1)2x+5y=3 X-3y=7 2) 3y=11-2x 3x=y-11 3)8x-6y=14 12x-9y=18

37. ## business algebra

Use row operations on augmented matrices to solve the given systems of linear equations. x + y − z = 0 x + 2y + 4z = −3 3x − y − 22z = 19

38. ## Precalculus 11

I have kind of a general question... I'm working on a unit about solving systems of equations & I just feel like I've lost the general concept a little bit. When something says, "use your graphing calculator to solve the following systems of equations."

39. ## math

List advantages and disadvantages comparing and contrasting solving systems of linear equations with two variables by graphing and by equation method. Explain which method you prefer and why. Support your answer by providing appropriate examples

40. ## Math

I have a math question I am stuck on. It is on the applications of linear systems. This is the question: A club raised 5000\$ for a trip, they invested part of the money into a savings account with 4% interest, they put the rest of the money into a

41. ## algebra2

solve the equation: First: x + 3y = 5 Second: 3x - y = 5 should i use substitution or add them? "First" + 3 times "Second" eliminates y: x + 3y + 3*(3x - y) = 5 + 3*5 ---> 10 x = 20 ----> x = 2 Inserting in "First" gives: 2 + 3 y = 5 ---> 3 y = 3 ----> y =

42. ## algebra

1 Solve the set of linear equations by the matrix method : a+3b+2c=3 , 2a-b-3c= -8, 5a+2b+c=9. Sove for a 2 4 7 3 2 Solve the set of linear equations by Guassian elimination method : a+2b+3c=5, 3a-b+2c=8, 4a-6b-4c=-2. Find a 1 4 5 -1 3 Solve the set of

43. ## probability and statistics

Let Θ1, Θ2, W1, and W2 be independent standard normal random variables. We obtain two observations, X1=Θ1+W1,X2=Θ1+Θ2+W2. Find the MAP estimate θ^=(θ^1,θ^2) of (Θ1,Θ2) if we observe that X1=1, X2=3. (You will have to solve a system of two linear

44. ## Algebra

Can you please give an example step by step of how to solve a system of linear equations in three variables?

45. ## math

Solve following system of equations? x+3z=-2 2x+2y+z=4 3x+y-2z=5 i need help with few so i can get hang of this math plz. Perform row operations write new matrix [132 -312 2-11| 073] R1+R2 using x,yand z variables write system linear equations represented

46. ## Algebra I

How do you write a system of linear equations in two variables? Explain this in words and by using mathematical notation in an equation. What steps will be taken to solve the system that you provided?

47. ## Discrete Math

I am really stuck on these problems. I've worked a lot of them but I can't get these. Sometimes I think I know the answer but I can't show how I got it. 1.) Solve each matrix equation for X. 2X + 5A = B 2.) Find the following matrices: a. AB b. BA A= 2 4 3

48. ## Math

Solving systems of equations with three variables? What is the solution to the system? 1] x+y+z=-3 2] 3y-z=4 3] 2x-y-2z=-5

49. ## Algebra 2

Solving Systems of Equations in Three Variables: 3x+3y-z=-3 -2x-3y+2z=3 x-6y+3z=0 PLease show work

50. ## Algebra 2

Solving Systems of Equations in Three Variables: 3x+4y+z=1 x+3y-z=-2 -2x+y-2z=-5 Please show work

51. ## College Algebra

solve systems of equations by graphing... I get how to graph and solve equations but i just don't understand why its coming out wrong u=v 4u=3v-3

52. ## Basic Math

I forgot how to solve for two variables... Please check if I solved both problems properly! Thank you. Equations: (solve for t and z) 12t + 4z = 80 2t + 4z = 20 My answer: t = 2, z = 14 The steps: (simplified it) z = 20 - 3t, z = 5 - 0.5t (equated both

53. ## math

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 student took out two loans totaling \$10,000 to help pay for college

54. ## math

What is the value of t in the solution to this systems of linear equations? 2s – 3t = –1 3s – 4t = 0 a)–5 b)3 c)-7/3 d)4

55. ## math

What is the value of t in the solution to this systems of linear equations? 2s – 3t = –1 3s – 4t = 0 a)–5 b)3 c)-7/3 d)4

56. ## math

What is the value of t in the solution to this systems of linear equations? 2s – 3t = –1 3s – 4t = 0 a)–5 b)3 c)-7/3 d)4

57. ## math/algebra

solve each of the following systems by substitution. 16) 5x -2y = -5 y - 5x = 3 20) 8x -4y = 16 y = 2x - 4 28) 4x -12y = 5 -x + 3y = -1 Step one: Solve on of the equations for one of the variables. y=2x-4 Step two:Substitute the expression for the variable

58. ## Algebra

Solving Linear Equations and Inequalities Solve by eliminating x (this is solving 3 linear equations) then substitute to the other two equation x + y + 5z =2 (1) 4x - 3y + 5z =3 (2) 3x - 2y + 5z=1 (3) my teacher gave me the answer she said the solution set

59. ## Math

How do you solve an eguation with 2 variables? You have to have two independent equations to solve for each of the variables.

60. ## college math 116

Functions are a lot like equations. In a function we look at the relationship of the variables. Does one variable depend on the other. In a function when you see f(x) it just means "y." So we have an equation y = 2x + 3 and a function that is f(x) = 2x +

61. ## math

Determine the solution of the following systems of linear equations using elimination. 2x + 3y = 7 x – 2y – 4 = 0

62. ## algebra

Can someone please help. Explain how you can determine from the graph of a system of two linear equations in two variables whether it is an inconsistent system of equations. Thanks

63. ## algebra

I need help. Can someone help me please. Explain how you can determine from the graph of a system of two linear equations in two variables whether it is an inconsistent system of equations. Thank you

64. ## algebra

Explain how you can determine from the graph of a system of two linear equations in two variables whether it is an inconsistent system of equations.

65. ## science

1 What is a set of real or complex numbers or elements arranged in rows or columns to form a rectangular array. set matrix determinant real numbers 2 If A.x= λx ,where A= ∣∣∣∣211232−212∣∣∣∣ ,determine the eigen values of the matrix A,

66. ## Algebra 2

6x=9y-21. 6y=4x+14 plz help...I can't figure out how to do this problem using linear equations with two variables

67. ## MATH

i don't understand how to graph systems of equations or graphing linear in ineqalities

68. ## maths

Write the equations below in the form y = mx + c. State how many solutions each systems of linear equation have. 3x = 6y 2y - 6x + 2 = 0

69. ## math

How do you solve systems of inequalities in two variables?

70. ## Algebra

Translate each situation to a system of equations. Do not attempt to solve. Paint Town sold 45 paintbrushes, one kind at \$8.50 each and another at \$9.50 each. In all, \$398.75 was taken in for the brushes. How many of each kind were sold? My teacher told me

71. ## Calculus

Please check my answers. Solve the following equations and/or system of equations for the unknown variables. 1. x^2-3x-12=0 x= 3 + sqrt(57) / 2, x= 3 - sqrt(57) / 2 2. x+y=8 , 3x+2y=2 x=-14, y=22 3. 3x + 2y =10 , x+y=5 , y+z =9 x=0,y=5, z=4 4. 1/x-p1z=0,

72. ## Algebra

Systems of Equation Fair Race. Hello, this question relates to Solving Systems of Equations. I was asked to complete a portfolio, here are the directions for said portfolio: 1. Choose two animals with different speeds. You can choose from the chart that

73. ## Algebra

I don't quite understand how to solve matrices with three variables. If I have the equations: 7x-4y-2z=0 2x-3y+z=-0.25 -2x-2y+5z=0 How can I solve this? I saw the explanation in a site but I didn't understand it. They appeared to make random operations

74. ## Algebra 2

1.) Write a system of equations that has NO solution. 2.) If you wanted to eliminate the y variables in the system of equations below, what would you multiply the first and second equations by?( Do not solve the equation) 2x-3y=8 7x-4y=11

75. ## Algebra 2

1.) Write a system of equations that has NO solution. 2.) If you wanted to eliminate the y variables in the system of equations below, what would you multiply the first and second equations by?( Do not solve the equation) 2x-3y=8 7x-4y=11

76. ## algebra

I'm working on solving linear systems by substitution, here are the equations: 4x+3=y and x=y-2 what is the sollution? and please show me the steps! thanks!

77. ## Math

The perimeter of a rectangle is 74 centimeters. The width is doubled and the length is halved. The new rectangle has a perimeter of 76 centimeters. Find the dimensions. Okay, so in class we're learning about Systems of Equations. What are the equations for

78. ## Math

Okay .. Im working on Linear Equations and am VERY confused can someone help me solve this equation? (Remember its : Linear Equation) y=3x+4 Ok Gabby, this is a line with slope 3 and y intercept 4. Have you seen how to graph lines yet? (Incidentally, we

79. ## math

Solve systems by substitution 5x - 2y = -5 y - 5x = 3 Substitute 5x + 3 for y in the first equation, and solve it for x. Once you have x, use either of the two equations you wrote to solve for y.

80. ## Geometry :(

this maths problem is wrecking my head.... 1.find the points of interesction of the line L and the circle k in the following L:x-2y=0 K:X Squared + y squared=25 I would solve both equations for y, and then you'll have a system with two equations and two

81. ## Algebra

What similarities and differences do you see between functions and linear equations? Are all linear equations functions? Is there an instance when a linear equation is not a function? Support your answer. Create an equation of a nonlinear function and

82. ## Algebra HELP

USE LINEAR COMBINATIONS TO SOLVE THE SYSTEM OF LINEAR EQUATIONS (please show steps) 1) -X+8Y=16 2) 4X+5Y=-2 3)4Y=15-3X 3X+4Y=36 5X-4Y=-23 2Y=3X+21

83. ## Algebra

Solve this system of linear equations. * Used the substitution method 3x - y = 8 4x - y = -15 ----------------------------------------- WORK y = 3x - 8 4x - (3x - 8 ) = -15 4x - 3x + 8 = -15 x + 8 = -15 x = -7 3x - y = 8 3(-7) - y = 8 -21 - y = 8 -y = 29 y

84. ## algebra

1 A + (B + C)= (A + B) + C associative scalar quantity dot product 2 2 2 3 Two systems of linear equations involving the same variables are said to be _______ if they have the same solution set. set associative equivalent parallel 4 Compute the determinant

85. ## Math

How do you write a system of linear equations in two variables? Explain this in words and by using mathematical notation in an equation.

86. ## math

How do you write a system of linear equations in two variables? Explain this in words and by using mathematical notation in an equation.

87. ## math

How do you write a system of linear equations in two variables? Explain this in words and by using mathematical notation in an equation.

88. ## math

i only need help on these two: *2/3y=10+4x 5x=1/3y-8 *5x=4y-30 2x+3y=-12 DIRECTIONS:use linear combinations to solve the system of linear equations.. thanks :)

89. ## Differential Equations

We are learning how to solve systems of linear ODE's by elimination. I am not sure how to solve this: x'=-y+t y'=x-t I took the derivative of the second eqn to get y''-x'=-t' and added the two to get y''+y=-t'+t but I don't think thats the right way to

90. ## graphing

how do you solve linear systems by graphing like x-y=2 x+y=-8

91. ## algebra

Use linear combinations to solve these systems. 5r-3s=12 3r+55=28

92. ## Math

use linear combinations to solve the system of linear equations. 2x+y=4 x-y=2

93. ## math

PLEASE!!!!i need help on these 4: *4y=15-3x 2y=3x+21 *4x=5y-14 y=-6x-9 *5x=4y-30 2x=3y=-12 *2/3y=10+4x 5x=1/3y-8 use linear combinations to solve the system of linear equations thank you!!!

94. ## math

PLEASE!!!!i need help on these 4: *4y=15-3x 2y=3x+21 *4x=5y-14 y=-6x-9 *5x=4y-30 2x=3y=-12 *2/3y=10+4x 5x=1/3y-8 use linear combinations to solve the system of linear equations thank you!!!

95. ## Algebra

solving linear equations with 3 variables 1) x+y=1300 2) x+2z=1400 3) x+y+z=1600 this one should be so easy but i don't get which equation i should pick first?!

96. ## Math, Algebra, Graphing Systems of Linear Equation

I'm confused about graphing or solving the linear equations for slope/intercept. Here is what I solved: 3x+2y=-6 X-4y=-16 2y= -3x-6 -4y=1x-16 Y=-3/2+3 Y=+1/4+4 ------------- My answer for graphing the systems for the lines to intersect...well, they didn't

97. ## algebra

How do I do substitution equations out of the equations in the system, pick the one that has the least amount of funky numbers. then make that equation equal to either x or y(or any other variable dependin on what kind of systems youre doing, usually just

98. ## math

My teacher said we are supossed to solve this using systems of equations: Let a, b, and c be real numbers such that a-7b+8c=4 and 8a+4b-c=7. Then a^2-b^2+c^2= ? can someone please help?! i don't know what method to use to solve this or where to start

99. ## math!

My teacher said we are supossed to solve this using systems of equations: Let a, b, and c be real numbers such that a-7b+8c=4 and 8a+4b-c=7. Then a^2-b^2+c^2= ? can someone please help?! i don't know what method to use to solve this or where to start

100. ## algebra

solve the following systems of equations , x+2y=9,x=5-2y