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3 years ago

HELP??? Which expression is represented by the model?

Mathematics

2 answers:

Stolb23 [73]3 years ago

7 0

Answer:

Step-by-step explanation:

D i'm sure

kykrilka [37]3 years ago

6 0

Answer:

-x+3 pretty sure

Step-by-step explanation:

becuase it shows -x and shows 3 positives so + 3

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2564.0 millimeters tall. If the boards are too long they must be trimmed, and if the boards are too short they cannot be used. A

Leokris [45]

Answer:

We conclude that the board's length is equal to 2564.0 millimeters.

Step-by-step explanation:

We are given that a sample of 26 is made, and it is found that they have a mean of 2559.5 millimeters with a standard deviation of 15.0.

Let $\mu$ = population mean length of the board.

So, Null Hypothesis, $H_0$ : $\mu$ = 2564.0 millimeters {means that the board's length is equal to 2564.0 millimeters}

Alternate Hypothesis, $H_A$ : $\mu$ $\neq$ 2564.0 millimeters {means that the boards are either too long or too short}

The test statistics that will be used here is One-sample t-test statistics because we don't know about the population standard deviation;

T.S. = $\frac{\bar X-\mu}{\frac{s }{\sqrt{n}} }$ ~ $t_n_-_1$

where, $\bar X$ = sample mean length of boards = 2559.5 millimeters

s = sample standard deviation = 15.0 millimeters

n = sample of boards = 26

So, the test statistics = $\frac{2559.5-2564.0}{\frac{15.0 }{\sqrt{26}} }$ ~ $t_2_5$

= -1.529

The value of t-test statistics is -1.529.

Now, at a 0.05 level of significance, the t table gives a critical value of -2.06 and 2.06 at 25 degrees of freedom for the two-tailed test.

Since the value of our test statistics lies within the range of critical values of t, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region.

Therefore, we conclude that the board's length is equal to 2564.0 millimeters.

4 0

3 years ago

Can someone help me with this problem

balandron [24]

Hi! Your answer should be, 1,960.89

Hope this helps you!

3 0

3 years ago

Determine whether the events E and F are independent or dependent. Justify your answer. (a) E: A person living at least 70 yea

Gnoma [55]

Answer:

a) E & F are dependent because regularly handling venomous snakes can affect the probability of a person living at least 70 years.

Step-by-step explanation:

Independent Events. When two events are said to be independent of each other, what this means is that the probability that one event occurs in no way affects the probability of the other event occurring.

Two events are dependent if the outcome or occurrence of the first affects the outcome or occurrence of the second so that the probability is changed.

Since Venomous snakes are species of the suborder Serpents that are capable of producing venom, which they use for killing prey, for defense, and to assist with digestion of their prey and the older you get the less active you become, Hence the handle of venomous snakes can affect the probability of a person living at least 70 years

6 0

3 years ago

Help 1 and 4 fast please

AlekseyPX

Answer:

$\leq : Less than or equal to\\\geq :Greater than or equal to\\:greater than$

Step-by-step explanation:

N/A

also what is your inequality problem

3 0

3 years ago

PLEASE Find the value of x.

Nadusha1986 [10]

Answer:

45 degrees

Step-by-step explanation:

45 is half of 90, 90 is a right angle

8 0

3 years ago