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aliya0001 [1]
3 years ago
8

Solve the system by elimination. (Please explain how to do it)

Mathematics
1 answer:
Naddika [18.5K]3 years ago
3 0

Apply to Row 2 : Row 2 + Row 1

2x + 2y + 3z = 0

y + 4z = -3

2x + 3y + 3z = 5

Apply to Row 3: Row 3 - Row 1

2x + 2y + 3z = 0

y + 4z = -3

y = 5

Apply to Row 3: Row 3 - Row 2

2x + 2y + 3z = 0

y + 4z = -3

-4z = 8

Simplify rows

2x + 2y + 3z = 0

y + 4z = -3

z = -2

<em>Note that the matrix is in echelon form now. The next steps are for back substitution.</em>

Apply to Row 2: Row 2 - 4 Row 3

2x + 2y + 3z = 0

y = 5

z = -2

Apply to Row 1: Row 1 - 3 Row 3

2x + 2y = 6

y = 5

z = -2

Apply to Row 1: Row 1 - 2 Row 2

2x = -4

y = 5

z = 2

Simplify the rows

<u>x = -2</u>

<u>y = 5</u>

<u>z = -2</u>

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2 years ago
At the fall festival, a booth is selling $5 meals and $10 meals. They sell 1000 meals in all and collect $3500. Which system of
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The system of equation that can be used to represent the number of meals sold is

x + y = 1000

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Given:

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The equations:

Quantity

x + y = 1000

Price

5x + 10y = 3,500

Therefore, the system of equation that can be used to represent the number of meals sold is

x + y = 1000

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brainly.com/question/15165519

5 0
2 years ago
What is the answer??? so confused
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Answer:

3  1/2

Step-by-step explanation:

Put '3' where 'y' is and compute :

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3 0
2 years ago
FREE BRAINLIEST TO WHOEVER ANSWERS CORRECTLY!! (I CAN TELL I YOU LIE)
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Step-by-step explanation:

4 0
2 years ago
Akira and tori Chang received a total of $48,000 from an estate. They decided to put $9,600 in a trust and divide the remainder.
Dahasolnce [82]

Answer:

$24,000

Step-by-step explanation:

After putting in trust they have left:

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3 years ago
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