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satela [25.4K]
3 years ago
15

What is the solution to the system of equations?

Mathematics
1 answer:
dusya [7]3 years ago
8 0

Answer:

1.x=-4+ y/2 - z/2

2. X=-4-y-z

3. x=y/3-2/3

Step-by-step explanation:

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Please help, very confused
miss Akunina [59]

Answer:

1.

-3x + 8y = -5

6x + 2y = -8

Set the equations to a common variable.

-3x + 8y = -5 → 8y = 3x - 5 → y = 3/8x - 5/8

6x + 2y = -8 → 2y = -6x - 8 → y = -3x - 4

Set the equations equal to each other.

3/8x - 5/8 = -3x - 4

Combine like terms.

3x + 3/8x = -4 + 5/8

3.375x = -3.375

Divide by 3.375

x = -1

Plug x back in to find y.

-3x + 8y = -5

-3(-1) + 8y = -5

3 + 8y = -5

8y = -8

y = -1

answer: (-1, -1)

2.

3x + 2y = -16

-3x - 8y = 46

Set the equations to a common variable.

3x + 2y = -16 → 2y = -3x - 16 → y = -3/2x - 8

-3x - 8y = 46 → -8y = 3x + 46 → y = -3/8x - 23/4

Set the equations equal to each other.

-3/2x - 8 = -3/8x - 23/4

Combine like terms.

-9/8x = 9/4

or

-1.125x = 2.25

Divide by -1.125

x = -2

Plug x back in to find y.

3(-2) + 2y = -16

-6 + 2y = -16

2y = -10

y = -5

answer: (-2, -5)

6 0
3 years ago
Read 2 more answers
Multiply 2.345 x 0.023<br> show your work please
Mice21 [21]

Answer:

2.345×0.023

2.345..........3 decimal point

0.023........3 decimal point

    2345

×       23               1.    first we change it whole number for multiply.

····················          2.count the decimal point.here  6 decimal points are there.

+ 7 0 3  5          3.we got the answer 53935.here only 5 digits are there.

4 6 9 0 0         4.now we add one zero backside  053935

····························5 . final answer is   0.053935

 5  3  9  3   5

···························

answer is =0.053935

Step-by-step explanation:

3 0
2 years ago
Find the product of<br> (-4x2+2x)(9x3)
RSB [31]

Answer:

Can't guess whether you have written 'x' or you have put a sign of multiplication!!

6 0
3 years ago
Help its for a gradeee
Fudgin [204]

Answer:

B

Step-by-step explanation:

Both of them have the same variable and are both raised to the 5th power (Like the example in the last sentence of the text)

5 0
2 years ago
PLEASE HURRY AND HELP ...
Nonamiya [84]

Answer:

Volume= 35.257

Step-by-step explanation:

∙ x V cylinder = π r 2 h

here diameter  = 3.25 ⇒ radius  = 1.625 ⇒ volume  = π × ( 1.625 ) 2 × 4.25× × × × ≈ 35.257  cubic inches

8 0
3 years ago
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