X - 3= - 18<br> Solve this equation

Neal used magnetic letters to spell the word communication on his file cabinet. One of the magnets fell on the floor. What is th

Nataliya [291]

Answer:

the likehood that an n fell on the floor is 2 in 13.

Step-by-step explanation:

8 0

4 years ago

Read 2 more answers

What is the value of x?

yuradex [85]

Answer:

x = 12

Step-by-step explanation:

7 0

3 years ago

Is 90° an acute angle, right angle, obtuse<br> angle, or straight angle?

VashaNatasha [74]

Answer:

90 degrees is a right angle.

Step-by-step explanation:

|_

^ That would be a 90 degrees angle.

|

|____

|___|____________

Imagine this is a graph, that little square of the right would represent 90 degrees.

Angles less than 90 are acute angles, angles over 90 but under 180 degrees would be obtuse, and angles that are equal to 180 degrees are straight.

6 0

3 years ago

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An automobile manufacturer has given its van a 31.3 miles/gallon (MPG) rating. An independent testing firm has been contracted t

Fynjy0 [20]

Answer:

$z=\frac{31.1-31.3}{\frac{1.3}{\sqrt{140}}}=-1.82$

The p value for this case would be given by:

$p_v =2*P(z$

For this case since the p value is higher than the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true mean is not significantly different from 31.3 MPG

Step-by-step explanation:

Information given

$\bar X=31.1$ represent the sample mean

$\sigma=1.3$ represent the population standard deviation

$n=140$ sample size

$\mu_o =31.3$ represent the value that we want to test

$\alpha=0.02$ represent the significance level for the hypothesis test.

z would represent the statistic

$p_v$ represent the p value

Hypothesis to test

We want to test if the true mean is equal to 31.3 MPG, the system of hypothesis would be:

Null hypothesis: $\mu =31.3$

Alternative hypothesis: $\mu \neq 31.3$

Since we know the population deviation, the statistic is given by

$z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

Replacing we got:

$z=\frac{31.1-31.3}{\frac{1.3}{\sqrt{140}}}=-1.82$

The p value for this case would be given by:

$p_v =2*P(z$

For this case since the p value is higher than the significance level we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true mean is not significantly different from 31.3 MPG

4 0

3 years ago

What is 50,779 divided by 590? Attach work pretty plz

nignag [31]

50,779/590 is 90.7125 but rounded to 90.71

6 0

3 years ago

X - 3= - 18 Solve this equation