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3 years ago

Can someone help me?

Mathematics

1 answer:

Natali5045456 [20]3 years ago

8 0

Answer:

x = 80

Step-by-step explanation:

3x/2=120°

3x=240°

x=80°

Answered by GAUTHMATH

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The standard deviation of a sample taken from population A is 17.6 for a sample of 25.

lawyer [7]

Answer:

The standard deviation of the sample mean differences is _5.23_

Step-by-step explanation:

We have a sample of a population A and a sample of a population B.

For the sample of population A, the standard deviation $\sigma_A$ is

$\sigma_A = 17.6$

The sample size $n_A$ is:

$n_A = 25$ .

For the sample of population B, the standard deviation $\sigma_B$ is

$\sigma_B = 21.2$

The sample size $n_B$ is:

$n_B = 30$ .

Then the standard deviation for the difference of means has the following form:

$\sigma=\sqrt{\frac{\sigma_A^2}{n_A}+\frac{\sigma_B^2}{n_B}}$

Finally

$\sigma=\sqrt{\frac{17.6^2}{25}+\frac{21.2^2}{30}}\\\\\sigma= 5.23$

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4 years ago

Write the slope intercept form Through:(1,-5) and(4, -1)

erastovalidia [21]

Answer:

Slope intercept form is

$y=\frac{4}{3} x- \frac{19}{3}$

4 0

3 years ago

(ONLY TWO CAPITAL LETTERS) PLEASE ANSWER CORRECTLY!!!!!! WILL MARK BRIANLIEST!!!!!!!! URGENT

sukhopar [10]

L is perpendicular to I

6 0

3 years ago

Change the fraction to a decimal: 13/50

Margarita [4]

$\dfrac{13}{50}=\dfrac{13\cdot2}{50\cdot2}=\dfrac{26}{100}=0.26$

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3 years ago

Write the ratio as a fraction in the simplest form 25 to 45

svp [43]

25 to 45 can also be written as 25/45
Both numbers are divisible (can be divided by) 5
25 divided by 5 = 5
45 divided by 5 = 9

So 25/45 = 5/9

They are equivalent fractions because they’ve been divided by the same, shared number

6 0

3 years ago

Can someone help me?​

Can someone help me?