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Paha777 [63]
3 years ago
5

What is the y-Intercept of x+3y>9?

Mathematics
1 answer:
IrinaK [193]3 years ago
6 0

Answer:

3

Step-by-step explanation:

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The difference of two numbers is 8. When twice the first number is added to three times the second number, the result is 51. Wha
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3 years ago
Read 2 more answers
Match the cofactors to their corresponding entries in the matrix.
Masja [62]

Answer:

The co-factors and their values are shown in the table below.

Step-by-step explanation:

We are given the matrix, \begin{bmatrix}3&7&1\\7&1&-3\\8&5&1\end{bmatrix}.

It is required to match the co-factors with the corresponding values.

As, the co-factors are given by,

A_{c_{ij}} = (-1)^{i+j}(d), where the d= determinant of the matrix after removing the i- row and j- column.

So, we have,

1. A_{c_{11}}.

So, A_{c_{11}}=(-1)^{1+1}(1\times 1-5\times (-3))

i.e. A_{c_{11}}=(-1)^{2}(1+15)=16

2. A_{c_{13}}.

So, A_{c_{13}}=(-1)^{1+3}(7\times 5-1\times 8)

i.e. A_{c_{13}}=(-1)^{4}(35-8)=27

3. A_{c_{21}}.

So, A_{c_{21}}=(-1)^{2+1}(7\times 1-5\times 1)

i.e. A_{c_{21}}=(-1)^{3}(7-5)=-2

4. A_{c_{22}}.

So, A_{c_{22}}=(-1)^{2+2}(3\times 1-8\times 1)

i.e. A_{c_{22}}=(-1)^{4}(3-8)=-5

5. A_{c_{31}}.

So, A_{c_{31}}=(-1)^{3+1}(7\times (-3)-1\times 1)

i.e. A_{c_{31}}=(-1)^{4}(-21-1)=-22

Thus, we get,

Co-factor                 Value

A_{c_{11}}                              16

A_{c_{13}}                             27

A_{c_{21}}                             -2

A_{c_{22}}                            -5

A_{c_{31}}                           -22

4 0
2 years ago
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