All categories

3 years ago

Watch help video

Mathematics

1 answer:

Oksanka [162]3 years ago

3 0

Answer:

Step-by-step explanation:

Using the distance formula, the distance is ...

d = √((x2 -x1)^2 +(y2 -y1)^2)

d = √((-2-4)^2 +(-4-4)^2) = √((-6)^2 +(-8)^2) = √(36 +64)

d = √100 = 10

The distance between the two points is 10 units.

You might be interested in

A simple random sample of 20 days in which Parsnip ate seeds was selected, and the mean amount of time it took him to eat the se

bearhunter [10]

Answer:

$(14.5-13.9) -1.69 \sqrt{\frac{3.98^2}{20}+ \frac{4.03^2}{17}} = -1.63$

$(14.5-13.9) +1.69 \sqrt{\frac{3.98^2}{20}+ \frac{4.03^2}{17}} = 2.83$

And the confidence interval for this case $-1.63 \leq \mu_1 -\mu_2 \leq 2.83$

Step-by-step explanation:

We know the following info from the problem

$\bar X_1 = 14.5$ sample mean for the group 1

$s_1 = 3.98$ the standard deviation for the group 1

$n_1= 20$ the sample size for group 1

$\bar X_2 = 13.9$ sample mean for the group 2

$s_1 = 4.03$ the standard deviation for the group 2

$n_2= 17$ the sample size for group 2

We have all the conditions satisifed since we have random samples.

We want to construct a confidence interval for the true difference of means and the correct formula for this case is:

$(\bar X_1 -\bar X_2) \pm t_{\alpha/2}\sqrt{\frac{s^2_1}{n_1} +\frac{s^2_2}{n_2}}$

The degrees of freedom are given :

$df = n_1 +n_2- 2 = 20+17-2=35$

The confidence level is 0.9 or 90% and the significance level is $\alpha=1-0.9=0.1$ and $\alpha/2 = 0.05$ and the critical value for this case is:

$t_{\alpha/2} = 1.69$

And replacing the info given we got:

$(14.5-13.9) -1.69 \sqrt{\frac{3.98^2}{20}+ \frac{4.03^2}{17}} = -1.63$

$(14.5-13.9) +1.69 \sqrt{\frac{3.98^2}{20}+ \frac{4.03^2}{17}} = 2.83$

And the confidence interval for this case $-1.63 \leq \mu_1 -\mu_2 \leq 2.83$

5 0

3 years ago

What is 2/3 x (9+12)

GalinKa [24]

2/3 x (9+12) is 14. Hope it helps :)

3 0

3 years ago

This question is confusing to me please help..

lisabon 2012 [21]

Answer:

Step-by-step explanation:

First off find how many bowls and vases combined

12 bowls and 8 vases therefore 20

to find 1/4 of a number divide by 4

therefore, 20/4 is 5

5 0

3 years ago

Just please help i need help please!!

anastassius [24]

Answer: 1- a square has 4 equal sides so if one side is 9cm then the rest are 9cm, so 9x4= 36cm

2- do the same thing as part 1 but add a power of 2 to it, so 36^2 = 1296cm

Step-by-step explanation:

5 0

3 years ago

Please help me :( I would appreciate it

Step2247 [10]

Answer:

Step-by-step explanation:

The box plot for the Panthers is perfectly symmetric and the box plot for the Wolverines is skewed, but it is skewed in the positive direction.

3 0

3 years ago