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3 years ago

15

tay bought two t shirts for 26$ and some pairs of socks for 5.95 per pair. his total purchase came to 49.80. How many pairs of s

ocks did he buy

2 answers:

erik [133]3 years ago

5 0

Answer:

5

Step-by-step explanation:

5765765

Llana [10]3 years ago

3 0

Answer:

4

Step-by-step explanation:

5.95×4=23.80+26=49.80

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A map is made to a scale of 1/4 inch is to 12 inches. What is the actual length of a room in feet whose length on the map is 3 3

egoroff_w [7]

In this example, we are to find the actual length of a room based from its length on the map by using ratio and proportion.
For our solution to be more clearer, let us turn the fractions into decimals.
1/4 inch = 0.25 in.
3 3/8 inches = 3.375 in.

So, for every 0.25 inches from the map there will be 12 inches in the room, and what we will find here is that how many inches are there in the room if there are 3.375 inches in the map.

Let x, be the length in the room,
$\frac{0.25}{12} = \frac{3.375}{x}$
Cross multiply the given fractions and you would get:
$0.25x=40.5$
$x=162$

So the length of the room, if the value of it in the map is 3 3/8 inch, is 162 inches.

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4 years ago

What is 0.2 as a percent?

Natasha_Volkova [10]

0.2 is also 20% hope this helps

6 0

4 years ago

Read 2 more answers

Assume that the heights of men are normally distributed with a mean of "71.3" inches and a standard deviation of 2.1 inches. If

Elza [17]

Answer:

0.0021 = 0.21% probability that they have a mean height greater than 72.3 inches.

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Assume that the heights of men are normally distributed with a mean of "71.3" inches and a standard deviation of 2.1 inches.

This means that $\mu = 71.3, \sigma = 2.1$

Sample of 36:

This means that $n = 36, s = \frac{2.1}{\sqrt{36}} = 0.35$

Find the probability that they have a mean height greater than 72.3 inches.

This is 1 subtracted by the pvalue of Z when X = 72.3. So

$Z = \frac{X - \mu}{\sigma}$

By the Central Limit Theorem

$Z = \frac{X - \mu}{s}$

$Z = \frac{72.3 - 71.3}{0.35}$

$Z = 2.86$

$Z = 2.86$ has a pvalue of 0.9979

1 - 0.9979 = 0.0021

0.0021 = 0.21% probability that they have a mean height greater than 72.3 inches.

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3 years ago

It's urgent please help

svetoff [14.1K]

Answer:

The equation of line is 2x-3y=15.

Step-by-step explanation:

Given;

Slope is 2/3 and crosses y axis at (0,-5).

Now, the point = (0,-5) that is $(x_{1},y_{1})$ and the slope of the line = 2/3 which is $m$ .

So, now putting the formula for the equation of the line:

$y-y_{1} =m(x-x_{1})$

$y-(-5)=\frac{2}{3}(x-0)$

$y+5=\frac{2}{3}(x-0)$

On solving equation we get :

$3y+15=2x-0$

$15=2x-3y$

$2x-3y=15$

Therefore, the equation of line is 2x-3y=15.

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4 years ago

Adrian made six free-throws Out of eight he attempted how many would you expect to make if you made 20 attempts

vovikov84 [41]

The answer will be 18

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4 years ago