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3 years ago

What property is 13+(7+29)=(13+7)+29

Mathematics

1 answer:

serg [7]3 years ago

4 0

Answer:

associative property

Step-by-step explanation:

grouping changes

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18 devided by 0.18 long division

lisov135 [29]

The answer to 18 divided by 0.18 is 100. Hope this helps!! :)

6 0

3 years ago

Researchers report that on average freshman who live on campus gain 15 pounds during their first year in college. You survey 10

neonofarm [45]

Answer: 1.460

Step-by-step explanation:

Given : Researchers report that on average freshman who live on campus gain 15 pounds during their first year in college.

Let $\mu$ represents the population mean .

Then, the set of hypothesis will be:-

$H_0: \mu=15$

$H_a:\mu\neq15$

We assume that this is normal distribution.

Sample size : n = 10, which is a small sample (n<30) ,s o we use t-test.

Sample mean : $\overliene{x}=16.2\ lbs$

Standard deviation : $\sigma=2.6$

The test statistic for population mean for small sample is given by :-

$t=\dfrac{\overline{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}$

$t=\dfrac{16.2-15}{\dfrac{2.6}{\sqrt{10}}}=1.45951276623\approx1.460$

Hence , the value of test statistic = 1.460

4 0

3 years ago

How do you solve this without using a calculator

Leviafan [203]

Answer:

$C)\:\:\frac{\sqrt 2}{ 2 }$

Step-by-step explanation:

$\sin \bigg( \frac{3\pi}{4} \bigg) \\ \\ = \sin \bigg( \pi - \frac{\pi}{4} \bigg) \\ \\ = \sin \bigg(\frac{\pi}{4} \bigg) \\ \\ = \frac{1}{ \sqrt{2} }\\\\= \frac{\sqrt 2}{ 2 }$

5 0

2 years ago

If the original quantity is 14 in the new quantity is 24 estimate the percent change<br>

denis23 [38]

Answer:

$\% \: change = \frac{(24 - 14)}{14} \times 100 \\ = \frac{10 \times 100}{14} \\ = \frac{1000}{14} \\ = 71.43\%$

<h2>Percentage change is 71.43%.</h2>

7 0

3 years ago

I need help ASAP thanks!!

Genrish500 [490]

Theorem

The measure of an exterior angle of a triangle equals the sum of measures of the remote interior angles.

Angle STV is an exterior angle of triangle SRT.

The two remote interior angles to exterior angle STV are angles S and R.

Since the triangle is isosceles, with sides ST and TR equal, angles S and R are equal, so they both measure 27 deg.

<STV = 27 + 27

<STV = 54

8 0

3 years ago