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3 years ago

13

Does 4/6 have equal parts

1 answer:

Svet_ta [14]3 years ago

6 0

Answer:

yes

Step-by-step explanation:

4/6 of 100 = 66.6666666667

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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

A quadratic equation ax^2+bx+c=0 has -11 and 4 as solutions. Find the values of b and c if the value of a is 1 (hint, use zero f

Alina [70]

Answer:

b = 7, c = -44

Step-by-step explanation:

If the quadratic equation has the solutions -11 and 4, the two factors are:

$(x+11)(x-4)=0$

Since when we use the zero factor property we get

x+11=0 ⇒ x= -11

x-4=0 ⇒ x=4

Thus, we have used the zero factor property in reverse to find the factorization of the quadratic equation.

Now we develop the multiplications between parenthesis:

$(x+11)(x-4)=0\\x^2-4x+11x-44=0\\x^2+7x-44=0$

So b is the number that accompanies the x: b = 7

and c is the independent number: c = -44

3 0

3 years ago

A professor is interested in the average length of books in her library. She has divided her books into a few different categori

natka813 [3]

Answer:I would rather be playing Minecraft

Step-by-step explanation:

I like Minecraft

8 0

3 years ago

Read 2 more answers

Which equation matches the statement

Ulleksa [173]

-4x+2=9 would be the answer for this equation

3 0

3 years ago

Read 2 more answers

Asher is asked to find the factors of 10. His work is below.

Assoli18 [71]

Answer:

B and D

Step-by-step explanation:

<u>Answer choices:</u>

A) Asher made errors in multiplication.

No, the products are correct

B) Asher found multiples of 10, not factors of 10.

Yes

C) Asher should have multiplied 10 × 4 as well.

No, 4 is not one of the factors of 10

D) Asher should have gotten this as the answer: 1, 2, 5, and 10.

Yes, these are the true factors of 10

E) Asher should have gotten this as the answer: 10, 20, 30, 40, …

No, the correct one is one before

5 0

2 years ago