P(7, - 2); y= 7x+4= 4<br><br><br> PLEASE HELP

I am thinking of an a number less than 20 greater than 10. the sum of the digits in the number is 6. what is the number? It’s fo

Leno4ka [110]

Answer:

might be 12

Step-by-step explanation:

i think so its prob 12 i just have a feeling

3 0

3 years ago

Find Equivalent Expression

____ [38]

Answer:

2x+2

Step-by-step explanation:

hello :

1/2 (4x + 4) =(1/2) (4x + (1/2) (4) = 2x+2

7 0

3 years ago

Condense the logarithm

QveST [7]

A picture isn’t attached

7 0

3 years ago

Help please!!!!!!!!!

In-s [12.5K]

ANSWER

24

EXPLANATION

For a matrix A of order n×n, the cofactor $C_{ij}$ of element $a_{ij}$ is defined to be

$C_{ij} = (-1)^{i+j} M_{ij}$

$M_{ij}$ is the minor of element $a_{ij}$ equal to the determinant of the matrix we get by taking matrix A and deleting row i and column j.

Here, we have

$C_{11} = (-1)^{1+1} M_{11} = M_{11}$

M₁₁ is the determinant of the matrix that is matrix A with row 1 and column 1 removed. The bold entries are the row and the column we delete.

$\begin{aligned} A=\begin{bmatrix} \bf 1 & \bf -6 & \bf -4\\ \bf 7 & 0 & -3 \\ \bf -9 & 8 & -8 \end{bmatrix} \implies M_{11} &= \text{det}\left(\begin{bmatrix} 0&-3 \\ 8&-8 \end{bmatrix} \right) \end{aligned}$

Since the determinant of a 2×2 matrix is

$\det\left( \begin{bmatrix} a & b \\ c& d \end{bmatrix} \right) = ad-bc$

it follows that

$\begin{aligned} A=\begin{bmatrix} \bf 1 & \bf -6 & \bf -4\\ \bf 7 & 0 & -3 \\ \bf -9 & 8 & -8 \end{bmatrix} \implies M_{11} &= \text{det}\left(\begin{bmatrix} 0&-3 \\ 8&-8 \end{bmatrix} \right) \\ &= (0)(-8) - (-3)(8) \\ &= -(-24) \\ &= 24 \end{aligned}$

so $C_{11} = M_{11} = 24$

4 0

3 years ago

Job A pays $19.94 per hour. Job B pays $18.76 per hour, and this job has health

lilavasa [31]

Evelyn should take job A

6 0

3 years ago

P(7, - 2); y= 7x+4= 4 PLEASE HELP