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sweet [91]
3 years ago
14

Which is the correct coefficient matrix for this system?

Mathematics
1 answer:
BlackZzzverrR [31]3 years ago
4 0

We have been given a system of equations and we are asked to write correct coefficient matrix for this system.

Since we know that a matrix for a system of equations is in the form: AX=B, where A represents the coefficient matrix, X is variables''s matrix and B is the constant matrix.          

We are given two equation and two unknown variables, so our coefficient matrix will be a 2\times2 matrix. Our matrices for variable and constant will be of dimensions 2\times1 (column matrix).

We can represent our given system of equations in matrix form as:

\left[\begin{array}{ccc}3&4\\-1&-6\end{array}\right] \left[\begin{array}{ccc}x\\y\end{array}\right]= \left[\begin{array}{ccc}12\\10\end{array}\right]

Now let us find our A, X and B parts from above matrices.

A=\left[\begin{array}{ccc}3&4\\-1&-6\end{array}\right]

X=\left[\begin{array}{ccc}x\\y\end{array}\right]

B=\left[\begin{array}{ccc}12\\10\end{array}\right]

Since we know that A represents coefficient matrix, therefore, correct coefficient matrix for our system of equations will be,

\left[\begin{array}{ccc}3&4\\-1&-6\end{array}\right]


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Airida [17]

The value of WACC is 6.72%

<h3>what is WACC?</h3>

WACC is calculated by multiplying the cost of each capital source (debt and equity) by its relevant weight by market value, and then adding the products together to determine the total.

WACC=[(Market value of Equity*cost of equity+ Market value of Debt* post tax cost of debt)/(Market value of Equity+ Market value of Debt)]

Market value of Equity= 40,000*$85=$3,400,000

Cost of equity=Risk free return+ Beta equity*market retrun

=4 +0.67*15

=7.35

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=2,210,760

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=9*80(1-20)

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WACC= [$3,400,000* 7.35+ 2,210,760 *  5.76%]\ $3,400,000+2,210,760

=6.72%

Learn more about this concept here:

brainly.com/question/14774411

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8 0
1 year ago
Simplify each expression. Select the correct answer from the drop-down menu.
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3 years ago
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