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elena-14-01-66 [18.8K]
3 years ago
6

X-y =3 work out 2x - 2y work out the value of y-x

Mathematics
1 answer:
devlian [24]3 years ago
4 0

Answer:

Step-by-step explanation:

x - y = 3\\\\2x - 2y = 2 ( x- y ) = 2 \times 3 = 6\\\\(y - x) = - (x - y) = - 3

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Write the system in a matrix equation. Then, find the determinant of the matrix containing the coefficients.
Shtirlitz [24]

Answer:

See below for the matrix

D = 100

Step-by-step explanation:

\left[\begin{array}{cccc}3&2&1&-8\\-1&-2&4&7\\1&-6&-3&15\end{array}\right]

         3    2    1

D =   -1    -2    4    =   3(-2)(-3) + 2(4)(1) + 1(-1)(-6)  

         1    -6   -3

                                    - 1(-2)(1) - 3(4)(-6) - 2(-1)(-3)

                           =  18 + 8 + 6 + 2 + 72 - 6

                           =  100

Sorry, I can't type the vertical bars.

I hope this is what you are looking for.

   

5 0
3 years ago
1.Solve for w.
iren [92.7K]
Hi there,

1) 
6 + (w - 10) = 5
6 + w - 10 = 5
- 4 + w = 5
w = 5 + 4

Hence, W = 9

2)
2/3 + y - 1/9 = 7/9
5/9 + y = 7/9
y= 7/9 - 5/9

Hence, Y = 2/9

4)
4x - 3/2x - 15/4 = 3/8
32x - 12x - 30 = 3
20x - 30 = 3
20x = 3 + 30
20x = 33

Hence, the answer is 33/20

5)
0.7(3s + 4) - 1.1s = 7.9
2.1s + 2.8 - 1.1 = 7.9
s + 2.8 = 7.9
s = 7.9 - 2.8

Hence, the answer is 5.1

Hope this all helps :)
8 0
3 years ago
Read 2 more answers
Help with this one please
Marysya12 [62]
The correct answer is the first option, which is:

 A=G^2/H; H=G^2/A

 
The explanation is shown below:

 1. To solve the exercise shown in the figure attached, you must apply the proccedure shown below:

 2. You have the following equation to calculate G:

 G=√AH

 3. Now, to find the formula to calculate A, you must clear the A, as below:

 G^2=(√AH)^2
 G^2=AH
 A=G^2/H

 4. Then, you must apply the same proccedure to find the formula for calculate H, as following:

 G^2=(√AH)^2
 G^2=AH
 H=G^2/A
5 0
3 years ago
Read 2 more answers
What are all the multiplication combinations for 18
stepan [7]
Here are the combinations:

1x18 = 18
18x1 = 18
9x2 = 18
2x9 = 18
6x3 = 18
3x6 = 18
7 0
3 years ago
Read 2 more answers
Please help me I’m desperate and in need of hep‼️‼️‼️ Describe how to calculate the volume of a composite 3-D figure.
Ugo [173]

Answer:

To find the volume of a composite 3D figure, draw any necessary planes to view the figure as basic three dimensional figures, then:

add basic figure volumes belonging to the composite shape.

subtract basic figure volumes NOT belonging to the composite figure.

Step-by-step explanation:

5 0
2 years ago
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