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Ira Lisetskai [31]
3 years ago
15

Oksana wrote the equation below on the whiteboard.

Mathematics
2 answers:
Kaylis [27]3 years ago
8 0

Answer:

b = 7

Step-by-step explanation:

6 b + 6 = 48

Subtract 6 from each side

6b+6-6 = 48 -6

6b = 42

Divide each side by 6

6b/6 = 42/6

b = 7

4vir4ik [10]3 years ago
8 0

Answer:

<h2>7</h2>

Step-by-step explanation:

6b +6 = 48

collect terms that is ,

6b =48 - 6

6b = 42

divide both sides by 6

therefore, b = 42/6 =7

Hope this helps !

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What is the determinant of the coefficient matrix of the system {4x+3y+2z=0 -3x+y+5z=0 -x-4y+3z=0
slava [35]

Answer:

  130

Step-by-step explanation:

You want the determinant of the matrix ...

  \left[\begin{array}{ccc}4&3&2\\-3&1&5\\-1&-4&3\end{array}\right]

One way to figure it is as the difference between the sum of products of the down-diagonals and the sum of products of the up-diagonals:

  D = (4)(1)(3) +(3)(5)(-1) +(2)(-3)(-4) -(-1)(1)(2) -(-4)(5)(4) -(3)(-3)(3)

  = 12 -15 +24 +2 +80 +27

  D = 130

The determinant of the coefficient matrix is 130.

_____

Many scientific and graphing calculators and web sites can perform this calculation for you.

7 0
3 years ago
8x - 8 - x = 3 (6 - 2x)
Ksivusya [100]

Answer:

x = 2

Step-by-step explanation:

8

−

8

−

=

3

(

6

−

2

)

{\color{#c92786}{8x}}-8{\color{#c92786}{-x}}=3(6-2x)

8x−8−x=3(6−2x)

7

−

8

=

3

(

6

−

2

)

7 0
2 years ago
HEPL MEEEE<br><br> 1. 1/2(x+1)-1/3(x-1)<br><br> 2. x-2/3(x-1)
nikdorinn [45]

Answer:

1.  1/6x + 5/6

2. 1/3x + 2/3

Step-by-step explanation:

5 0
2 years ago
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Can someone please help? I will mark brainlist!!!!
elena55 [62]

Answer:

D

Step-by-step explanation:

Because it moves 6 down and 6 right

4 0
2 years ago
Why is it important to describe the variable in an expression?
Korvikt [17]

Answer: They show numerical value. You have to make them clear.

Step-by-step explanation:

5 0
2 years ago
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