Mathematics, 16.10.2019 21:30, cece4649

Solve the system by elimination.
-2x+2y+3z=0
-2x-y+z=-3
2x+3y+3z=5

Answers: 1

Show answers

Answers

answered: wmaingrette1

The answer to your question is:

x = 1; y = 1, z = 0

Step-by-step explanation:

-2x + 2y + 3z = 0 (I)

-2x - y + z = -3 (II)

2x + 3y + 3z = 5 (III)

I and II. Multiply II by 2

-2x + 2y + 3z = 0

(2)(-2x - y + z = -3 )

-2x + 2y + 3z = 0

-4x - 2y + 2z = -6

-6x + 5z = - 6 (IV)

II and III. Multiply II by 3

-6x - 3y + 3z = -9 (II)

2x + 3y + 3z = 5 (III)

-4x + 6z = -4 (V)

IV and V. Multiply IV by 2 and V by -3

-12x + 10z = -12

12x - 18z = 12

- 8 z = 0

z = 0

Substitute z in IV

-6x + 5(0) = -6

-6x = -6

x = 1

Substitute x and z in I

-2(1) + 2y + 3(0) = 0

-2 + 2y = 0

2y = 2

y = 1

answered: Guest

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.

answered: Guest

c > -10.55

step-by-step explanation:

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 17:30, tristan4233

Noor brought 21 sheets of stickers. she gave 1/3 of a sheet to each of the 45 students at recess. she wants to give teachers 1 1/2 sheets each.

Answers: 2

continue

Mathematics, 21.06.2019 18:00, CarQuestionl506

If a translation of t-3,-8(x, y) is applied to square abcd what is the y-coordinate of b'? the y-coordinate of is 43 mark this and return save and exit next submit

Answers: 1

continue

Mathematics, 21.06.2019 19:00, iamnee

What are the solutions of the equation? 6x^2 + 11x + 4 = 0 a. 4/3, 1/2 b. -4/3, -1/2 c. 4/3, -1/2 d. -4/3, 1/2

Answers: 2

continue

Mathematics, 21.06.2019 23:00, jalenrussell321

The height of a birch tree, f(x), in inches, after x months is shown in the graph below. how much does the birch tree grow per month, and what will be the height of the birch tree after 10 months? a. the birch tree grows 1 inch per month. the height of the birch tree will be 16 inches after 10 months. b. the birch tree grows 2 inches per month. the height of the birch tree will be 26 inches after 10 months. c. the birch tree grows 3 inches per month. the height of the birch tree will be 36 inches after 10 months. d. the birch tree grows 2 inches per month. the height of the birch tree will be 24 inches after 10 months.

Answers: 1

continue

Do you know the correct answer?

Solve the system by elimination.
-2x+2y+3z=0
-2x-y+z=-3
2x+3y+3z=5...