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3 years ago

Select the three ratios that represent the number of blue marbles to red marbles.

Mathematics

1 answer:

Lyrx [107]3 years ago

3 0

Answer:

so if the number was 3 red marbles and 5 blue marbles the ratio would be 3:5

Step-by-step explanation:

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2 tan x<br>______<br>1+tan^2 x

Readme [11.4K]

Step-by-step explanation:

<h2> It's the expanded formula of </h2>

Tan2x

5 0

3 years ago

In constructing an open rectangular box from 2727 ft squaredft2 of material, what dimensions will result in a box of maximum v

zmey [24]

Idk I can understand how u do the

4 0

4 years ago

Will give ✨brainliest✨ to first who answers and explains or shows work. helpppop me plz

eimsori [14]

X^2/9 +7/3

~I believe this is the answer.

4 0

3 years ago

The pth percentile is a value such that approximately a. p percent of the observations are less than the value and (100 - p) per

kogti [31]

Answer:

p percent of the observations are less than the value and (100 - p) percent are more than this value.

Step-by-step explanation:

Given : The pth percentile is a value such that approximately

Solution :

Definition : A percentile is a measure used in statistics indicating the value below which a given percentage of observations in a group of observations falls

So, The pth percentile means p percentage of observations in a group of observations falls bellow the value

So, (100-p) percentage of observations in a group of observations falls above the value

So, Option a is true

Hence p percent of the observations are less than the value and (100 - p) percent are more than this value.

5 0

3 years ago

A study investigated the effectiveness of meditation training in reducing trait anxiety. The study evaluated subjects trait anxi

Setler79 [48]

Answer:

The 99% confidence interval for the population mean reduction in anxiety was (1.2, 8.6).

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 27 - 1 = 26

99% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 26 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.99}{2} = 0.995$ . So we have T = 2.7787.

The margin of error is:

$M = T\frac{s}{\sqrt{n}} = 2.7787\frac{6.9}{\sqrt{27}} = 3.7$

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 4.9 - 3.7 = 1.2.

The upper end of the interval is the sample mean added to M. So it is 4.9 + 3.7 = 8.6.

The 99% confidence interval for the population mean reduction in anxiety was (1.2, 8.6).

6 0

3 years ago