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3 years ago

Which mathematical property does this equation model? 6×1=6

Mathematics

1 answer:

VMariaS [17]3 years ago

3 0

Answer: the identity property.

Step-by-step explanation:

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What is the length of A

Marizza181 [45]

Step-by-step explanation:

Since the triangles are right angled and are similar,

by Pythagoras theorem,

(10√3)^2 = (5√3)^2 + a^2

a = 15, a > 0

Topic: Pythagoras theorem

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6 0

3 years ago

calculate the rate per litre of which a car uses petrol if it uses 20 litre of petrol to travel 180 km

topjm [15]

Answer:

9km per litre

Step-by-step explanation:

Rate=180km/20l

Rate=9 km/l

5 0

3 years ago

Need help!! don't know what I'm doing

Anarel [89]

Answer:

Its 9 :)

Step-by-step explanation:

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3 years ago

Read 2 more answers

1) Ten samples of a process measuring the number of returns per 100 receipts were taken for a local retail store.

densk [106]

Answer:

E) .0863

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The population proportion have the following distribution

$p \sim N(p,\sqrt{\frac{p(1-p)}{n}})$

Solution to the problem

For this case we can find the sample proportion for each observation with the following formula:

$\hat p = \frac{X}{n}$

Where X represent the number of returns and n =100 for each case since the standard value used. Using the last formula we got:

$p_1 = \frac{10}{100}=0.1$

$p_2 = \frac{9}{100}=0.09$

$p_3 = \frac{11}{100}=0.11$

$p_4 = \frac{7}{100}=0.07$

$p_5 = \frac{3}{100}=0.03$

$p_6 = \frac{12}{100}=0.12$

$p_7 = \frac{8}{100}=0.08$

$p_8 = \frac{4}{100}=0.04$

$p_9 = \frac{6}{100}=0.06$

$p_{10} = \frac{11}{100}=0.11$

And now witht those values we can find the sample mean of proportions with the following formula:

$hat p = \frac{\sum_{i=1}^n p_i}{n}= \frac{0.1+0.09+0.11+0.07+0.03+0.12+0.08+0.04+0.06+0.11}{10}=0.081$

And we can find the standard error with the following formula:

$SE= \sqrt{\frac{\hat p (1-\hat p)}{n}}=\sqrt{\frac{0.081(1-0.081)}{10}}=0.0863$

So then the best option on this case is given by:

E) .0863

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3 years ago

A total of raffle tickets were sold at a school fair

Elis [28]

Answer:

ok and what else there is 80 percent left

Step-by-step explanation:

6 0

3 years ago