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3 years ago

2/9 times (-6/5) please help me

Mathematics

2 answers:

Elenna [48]3 years ago

3 0

The Answer Would Be -4/15

SSSSS [86.1K]3 years ago

3 0

Answer:

-4/15

Step-by-step explanation:

2×-6=-12

9×5=45

divide -12/45 by 3

which gets you -4/15

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[10] In the following given system, determine a matrix A and vector b so that the system can be represented as a matrix equation

irina1246 [14]

Answer:

$y=-\frac{158}{579}$

Step-by-step explanation:

To find the matrix A, took all the numeric coefficient of the variables, the first column is for x, the second column for y, the third column for z and the last column for w:

$A=\left[\begin{array}{cccc}1&1&2&2\\-7&-3&5&-8\\4&1&1&1\\3&7&-1&1\end{array}\right]$

And the vector B is formed with the solution of each equation of the system: $b=\left[\begin{array}{c}3\\-3\\6\\1\end{array}\right]$

To apply the Cramer's rule, take the matrix A and replace the column assigned to the variable that you need to solve with the vector b, in this case, that would be the second column. This new matrix is going to be called $A_{2}$ .

$A_{2}=\left[\begin{array}{cccc}1&3&2&2\\-7&-3&5&-8\\4&6&1&1\\3&1&-1&1\end{array}\right]$

The value of y using Cramer's rule is:

$y=\frac{det(A_{2}) }{det(A)}$

Find the value of the determinant of each matrix, and divide:

$y==\frac{\left|\begin{array}{cccc}1&3&2&2\\-7&-3&5&-8\\4&6&1&1\\3&1&-1&1\end{array}\right|}{\left|\begin{array}{cccc}1&1&2&2\\-7&-3&5&-8\\4&1&1&1\\3&7&-1&1\end{array}\right|} =\frac{158}{-579}$

$y=-\frac{158}{579}$

7 0

3 years ago

Five less than twelve times a number is represented by:

Paraphin [41]

Option ( 1 )

.....................

5 0

3 years ago

How to set up 288*0.25

svlad2 [7]

Answer:

$72

288

there you go

hope this helps

brainliest plz

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4 0

3 years ago

Kate is building with blocks. She needs to build a rectangular prism that is 4 meters long by 3 meters wide by 112 meters high.

Xelga [282]

9514 1404 393

Answer:

1344 cubic meters

Step-by-step explanation:

The volume is the product of the dimensions for a rectangular prism:

V = LWH

V = (4 m)(3 m)(112 m) = 1344 m³

Kate needs a volume of 1344 cubic meters.

3 0

3 years ago

Rewrite 0.62 as a fraction in lowest terms.

ZanzabumX [31]

Answer: 31/50

Step-by-step explanation: 0.62= 62/100. After we must find the Greatest Common Factor which is two.

62/2=31 100/2=50

4 0

3 years ago

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