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3 years ago

ДОПОМОЖІТЬ, БУДЬ ЛАСКА !!!! МАТЕМАТИКА !!!!!!!!

Mathematics

1 answer:

ivann1987 [24]3 years ago

6 0

Plot a point at the Y-Intercept of -1 and Plot another point at the X-intercept of 1 and the DIGITS graphing tool should make a line from there

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I am thinking the answer is B but I am not positive

Yanka [14]

Answer:

I think so too

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2 years ago

Read 2 more answers

A local newspaper said that the city of Luttrell is expected to grow by 10% each year. The population in 2012 is 130,457 people.

Fofino [41]

Answer:

yes becvaib it is

Step-by-step explanation:

yes 0

6 0

2 years ago

Simplify using Quotient<br> Rule<br> 10^12 OVER 10^8

OverLord2011 [107]

Answer:

$10^4$

Step-by-step explanation:

All you have to di is subtract the exponents.

5 0

3 years ago

A student records the number of hours that they have studied each of the last 23 days. They compute a sample mean of 2.3 hours a

natita [175]

Answer:

the standard deviation increases

Step-by-step explanation:

Let x₁ , x₂, . . . , x₂₃ be the actual data observed by the student

The sample means = x₁ + x₂ + . . . , x₂₃ / 23

$= \frac{x_1 +x_2 +...x_2_3}{23}$

= 2.3hr

⇒ $\sum xi =2.3 \times 23 = 52.9hrs$

let x₁ , x₂, . . . , x₂₃ arranged in ascending order

Then x₂₃ was 10 and has been changed to 14

i.e x₂₃ increase to 4

Sample mean $= \frac{x_1 +x_2 +...x_2_3}{23}$

$\frac{52.9hrs + 4}{23} \\\\= \frac{56.9}{23} \\\\= 2.47$

therefore, the new sample mean is 2.47

2) For the old data set

the median is $x_1_2(th)$ values

$[\frac{n +1}{2} ]^t^h value$

when we use the new data set only x₂₃ is changed to 14

i.e the rest all observation remain unchanged

Hence, sample median = $[{x_1_2]^t^h value$ remain unchange

sample median = 2.5hrs

The Standard deviation of old data set is calculated

$=\sqrt{\frac{1}{n-1} \sum (xi - \bar x_{old})^2 } \\\\=\sqrt{\frac{1}{22}\sum ( xi - 2.3)^2 }---(1)$

The new sample standard sample deviation is calculated as

$= \sqrt{\frac{1}{n-1} \sum (xi-2.47)^2} ---(2)$

Now, when we compare (1) and (2) the square distance between each observation xi and old mean is less than the squared distance between each observation xi and the new mean.

Since,

(xi - 2.3)² ∑ (xi - 2.47)²

Therefore , the standard deviation increases

6 0

3 years ago

Based on the data, is there a clear association between having been on an airplane and having visited another country?

Roman55 [17]

Answer:

If you have exited the country, you most likely took a plane. Therefore yes there is an association between having been on a airplane and visiting another country.

(Also do u go to CCA? Bc I had the same q on my math quiz in Mrs.Pfeiffer's class)

4 0

2 years ago