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3 years ago

9

For each question, calculate the slope of a line that passes through the points

1 answer:

LekaFEV [45]3 years ago

8 0

I don’t know it’s hard tho

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The figure has 60 edges and 30 vertices

postnew [5]

<span>V - E + F = 2

30 - 60 + F = 2

- 30 + F = 2

F = 32

Answer: 32 faces</span>

7 0

3 years ago

Find<br> f (2) if f(x)=-5x2if x <-6

viva [34]

Answer: -180 for -6 and -20 for 2

Please give me Brainliest

3 0

3 years ago

What is the slope intercept for the following?<br> Y=1/3X+3<br> Y=4X-8<br> 2X-5Y=10<br> X=1/4Y-2

ahrayia [7]

The first two are already in slope intercept form. The third is y=2/5x-2. The fourth is y=4x+8.

6 0

2 years ago

Mars Take 686 Days To Orbit the sun. What percent of this time does the Earth take to orbit the sun

DiKsa [7]

All you want to do is find what 686-365 is because that's the percent increase. Next you divide the number that you got by 365 and that's your percentage increase.

6 0

2 years ago

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