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3 years ago

HELP FAST PLEASE

Mathematics

1 answer:

xz_007 [3.2K]3 years ago

5 0

Answer:

the answer should be 15

Step-by-step explanation:

hope this helps

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PLZ PLZ HURRY I WILL GIVE BRIANLEST

Colt1911 [192]

The answer is D Explanation: since the the slope is negative the x should be negative and D is the only one that has a negative X.

8 0

3 years ago

Read 2 more answers

A data set lists earthquake depths. The summary statistics are

irinina [24]

Answer:

Step-by-step explanation:

The summary of the given statistics data include:

sample size n = 400

sample mean $\overline x$ = 6.86

standard deviation = 4.37

Level of significance ∝ = 0.01

Population Mean $\mu$ = 6.00

Assume that a simple random sample has been selected. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim.

To start with the hypothesis;

The null and the alternative hypothesis can be computed as :

$H_o: \mu = 6.00 \\ \\ H_1 : \mu \neq 6.00$

The test statistics for this two tailed test can be computed as:

$z= \dfrac{\overline x - \mu}{\dfrac{\sigma}{\sqrt {n}}}$

$z= \dfrac{6.86 - 6.00}{\dfrac{4.37}{\sqrt {400}}}$

$z= \dfrac{0.86}{\dfrac{4.37}{20}}$

z = 3.936

degree of freedom = n - 1

degree of freedom = 400 - 1

degree of freedom = 399

At the level of significance ∝ = 0.01

P -value = 2 × (z < 3.936) since it is a two tailed test

P -value = 2 × ( 1 - P(z ≤ 3.936)

P -value = 2 × ( 1 -0.9999)

P -value = 2 × ( 0.0001)

P -value = 0.0002

Since the P-value is less than level of significance , we reject $H_o$ at level of significance 0.01

Conclusion: There is sufficient evidence to conclude that the original claim that the mean of the population of earthquake depths is 5.00 km.

7 0

3 years ago

Find the value of x. Round to the nearest.

USPshnik [31]

Answer:

Solution given:

perpendicular [P]=x

base[B]=9

hypotenuse [H]=41

Now.

By using Pythagoras law

H²=P²+B²

41²=x²+9²

x²=41²-9²

x= $\sqrt{1600}=40$

x=40 is a required answer.

4 0

3 years ago

What equation represents the line that passes through the points (3, -2) and (-1, 10)

cestrela7 [59]

Answer:

y=-3x-9

Step-by-step explanation:

Let's find the slope of the line

m=-2-10/3--1

m=-12/4=-3

The equation is given as

y-y1=m(x-x1)

y--2=-3(x-3)

y+2=-3x+9-2

y=-3x-7-2

y=-3x-9

8 0

3 years ago

Read 2 more answers

Nathaniel can't remember exactly how many cupcakes Haley and Virgil made for the Halloween party but he did remember that all to

amid [387]

Answer:

Haley = 62

Nathaniel = 48

Virgil = 46

Step-by-step explanation:

According to question ,

Haley + Virgil + Nathaniel had made total of = 156 cupcakes ..... 1

Haley + Nathaniel had made total of = 110 cupcakes ..... 2

Virgil + Nathaniel had made total of = 94 cupcakes ..... 3

So, from above three equations ,

From eq 2 and 3

(Haley + Nathaniel) - (Virgil + Nathaniel ) = 110 - 94

So, Haley - Virgil = 16 ..... 4

From eq 1 and 4

(Haley + Virgil + Nathaniel ) + ( Haley - Virgil ) = 156 + 16

2 Haley + Nathaniel = 172 ...... 5

From eq 2 and 5

( 2 Haley + Nathaniel ) - ( Haley + Nathaniel ) = 172 - 110 = 62

so, Haley = 62

In eq 5 put the Haley make value

so, Nathaniel = 172 - ( 2 × 62)

Nathaniel = 48

In eq 4 , put the value of Haley make value

So, Virgil = Haley - 16

Virgil = 62 - 16 = 46

Hence the value of all the three persons make is

Haley = 62

Nathaniel = 48

Virgil = 46 Answer

4 0

3 years ago