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3 years ago

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Please explain i will mark brainliesttt!

1 answer:

Sati [7]3 years ago

5 0

Answer:

<em>Answer is </em><em>given below with explanations</em><em>. </em>

Step-by-step explanation:

$given \: the \: line \: n \: passes \: through \\ \: ( - 3, - 7.5) \: \: and(2, - 5) \\ the \: equation \: of \: the \: line \: is \\ \frac{y - y1}{y2 - y1} = \frac{x - x1}{x2 - x1} \\ here \: x1 = - 3 \: \: \: y1 = - 7.5 \\ and \: \: x2 = 2 \: \: \: y2 = - 5 \\ \frac{y - ( - 7.5)}{ - 5 - ( - 7.5)} = \frac{x - ( - 3)}{2 - ( - 3)} \\ \frac{y + 7.5}{ - 5 + 7.5} = \frac{x + 3}{2 + 3} \\ \frac{y + 7.5}{2.5} = \frac{x + 3}{5} \\ dividing \: by \: 5 \: on \: both \: side s\\ \frac{y + 7.5}{0.5} = \frac{x + 3}{1} \\ 0.5(x + 3) = y + 7.5 \\ 0.5x + 1.5 = y + 7.5 \\ 0.5x - y - 6 = 0 \\ is \: the \: required \: equation.$

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Please help me <br>will mark brainliest

MAVERICK [17]

Answer:

4

-20

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Step-by-step explanation:

g(4)

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Shtirlitz [24]

Answer:

a) $\mu =69.5$

b) Null hypothesis: $\mu =69.5$

Alternative hypothesis: $\mu \neq 69.5$

And we can use a t test procedure in order to check if the true mean is equat to the desired value.

Step-by-step explanation:

For this case we know that this:

Claim: The mean pulse rate (in beats per minute) of adult males is equal to 69.5 bpm

Part a

If we convert this with symbols we can write this as:

$\mu =69.5$

Part b

We have the following info given:

$\bar X= 69.9$ represent the sample mean

$n =131$ represent the sample size

We have the following system of hypothesis:

Null hypothesis: $\mu =69.5$

Alternative hypothesis: $\mu \neq 69.5$

And we can use a t test procedure in order to check if the true mean is equat to the desired value.

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