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2 years ago

Page 151: 15-19 Someone Help...I don't understand how to do these parts I want to get better at them

Mathematics

1 answer:

Nastasia [14]2 years ago

5 0

Sorry it might be a little hard to see.

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What is the slope that crosses through the point (-4,-5) and (6,8)

Angelina_Jolie [31]

Slope = $\frac{Y2 - Y1}{X2 - X1}$

$\frac{8 - (-5)}{6 - (-4)}$

Your final answer is: $\frac{13}{10}$

5 0

3 years ago

An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 280 engines

DENIUS [597]

Answer:

The value of the test statistic is $t = -2.09$

Step-by-step explanation:

The null hypothesis is:

$H_{0} = 6.6$

The alternate hypotesis is:

$H_{1} \neq 6.6$

Our test statistic is:

$t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis, $\sigma$ is the standard deviation(square roof of the variance) and n is the size of the sample.

In this problem, we have that:

$X = 6.5, \mu = 6.6, \sigma = \sqrt{0.64} = 0.8, n = 280$

$t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

$t = \frac{6.5 - 6.6}{\frac{0.8}{\sqrt{280}}}$

$t = -2.09$

The value of the test statistic is $t = -2.09$

4 0

3 years ago

A ball is thrown straight up from the top of a tower that is 280 ft high with an initial velocity of 48 ft/s. The height of the

attashe74 [19]

ATTACHED is the written out response.

let me know if you need anymore help

brainliest is always appreciated

7 0

3 years ago

Use the given information to write the equation of the line

Sphinxa [80]

Its C cause the y intercept is -5

4 0

3 years ago

A tetrahedron has 4 sides. If the numbers 1, 2, 3, and 4 are on the faces of the tetrahedron, what

Savatey [412]

Probability of randomly rolling a 3 is 1/4

Step-by-step explanation:

Step 1:

It is given that a tetrahedron has 4 sides with 1,2,3 and 4 and is randomly rolled. We need to compute the probability of randomly rolling a 3.

Step 2:

Probability of an event = (Favorable outcomes) / (Total outcomes).

There are 4 total outcomes when the tetrahedron is rolled, these are the values 1 to 4.

The only favorable outcome is getting a 3

Probability of getting a 3 when the tetrahedron is randomly rolled = 1/4

Step 3:

Answer:

Probability of randomly rolling a 3 is 1/4

7 0

4 years ago

Page 151: 15-19 Someone Help...I don't understand how to do these parts I want to get better at them​

Page 151: 15-19 Someone Help...I don't understand how to do these parts I want to get better at them