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3 years ago

I need help, an answer or how to- will be fine, thank you. (i’ll mark brainliest if i can)

Mathematics

1 answer:

siniylev [52]3 years ago

7 0

by solving the first equation you'll get x= -24/13

if you solve the second option (B) then you'll the same result i.e x=-24/13

so option C is correct

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Find each. a. za_2 for the 99% confidence interval b. za_2 for the 98% confidence interval c. za_2 for the 95% confidence interv

irga5000 [103]

Answer:

a) Z = 2.575.

b) Z = 2.327.

c) Z = 1.96.

d) Z = 1.645.

e) Z = 1.88.

Step-by-step explanation:

Question a:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.99}{2} = 0.005$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.005 = 0.995$ , so Z = 2.575.

Question b:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.98}{2} = 0.01$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.01 = 0.99$ , so Z = 2.327.

Question c:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.025 = 0.975$ , so Z = 1.96.

Question d:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.9}{2} = 0.05$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.05 = 0.95$ , so Z = 1.645.

Question e:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.94}{2} = 0.03$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.03 = 0.97$ , so Z = 1.88.

8 0

3 years ago

50 POINTS !!<br><br><br> PLEASE HELP !! ILL GIVE BRAINLIEST TO THE RIGHT ANSWERS.

vfiekz [6]

Answer:

Step-by-step explanation:

16^2-1^2=15

7 0

3 years ago

Read 2 more answers

This is a lot but please help me I’ll mark u as brilliant

givi [52]

Answer:

see below

Step-by-step explanation:

# of sides = 3

# of vertices = 3

name of shape: triangle

# of sides = 4

# of vertices = 4

name of shape: quadrilateral

# of sides = 5

# of vertices = 5

name of shape: pentagon

# of sides = 6

# of vertices = 6

name of shape: hexagon

# of sides = 8

# of vertices = 8

name of shape: octagon

7 0

3 years ago

3,532 divided by 8

Aleksandr-060686 [28]

Answer:

441.5

Vghh h h. G g. H j j j

4 0

3 years ago

Read 2 more answers

PLZ answer!

Umnica [9.8K]

Answer:

The perimeter = 6r

Step-by-step explanation:

∵ the regular hexagon consists of 6 equilateral triangle

∴ The 3 sides of each triangle are equal

∵ Regular hexagon is inscribed in a circle

∴ Each vertex of the regular hexagon lies on the circle

∴ the radius of the circle is the the side of the triangle

∴ The length of each side of the triangle = r

∵ The regular hexagon has 6 equal sides all of them are the bases of the six equilateral triangles

∴ The perimeter of hexagon = 6 × r = 6r

3 0

3 years ago