Does 3 times 9.99 give me 29.97?

Mathematics

1 answer:

Delvig [45]3 years ago

7 0

Answer:

Yes it does.

Step-by-step explanation:

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Can someone help me with this please ?

rusak2 [61]

38 , because since its 90 degrees at exact, your subtract 90 from 52 and you would get 38 for your x value

8 0

3 years ago

The perimeter of a rectangular window is 364 cm If the lenth of window is 99 cm , what is its width?

Mumz [18]

width = 83 cm

Perimeter = 2(width) + 2(length)

So if l = 99 cm, and p = 364, then

364 = 2w + 2(99)

364 = 2w + 198

166 = 2w

w = 83 cm

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3 years ago

X= 0 y=3 what is the equation to the parallel line?

Semmy [17]

Answer:

Y - 3 - X = 0

Step-by-step explanation:

The points are (0,3)

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3 years ago

A simple random sample of 100 observations was taken from a large population. The sample mean and the standard deviation were de

olga2289 [7]

Answer:

Se=1.2

Step-by-step explanation:

The standard error is the standard deviation of a sample population. "It measures the accuracy with which a sample represents a population".

The central limit theorem (CLT) states "that the distribution of sample means approximates a normal distribution, as the sample size becomes larger, assuming that all samples are identical in size, and regardless of the population distribution shape"

The sample mean is defined as:

$\bar X =\frac{\sum_{i=1}^n x_i}{n}$

And the distribution for the sample mean is given by:

$\bar X \sim N(\mu,\frac{\sigma}{\sqrt{n}})$

Let X denotes the random variable that measures the particular characteristic of interest. Let, X1, X2, …, Xn be the values of the random variable for the n units of the sample.

As the sample size is large,(>30) it can be assumed that the distribution is normal. The standard error of the sample mean X bar is given by:

$Se=\frac{\sigma}{\sqrt{n}}$