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katovenus [111]
4 years ago
12

Can you please help me ​

Mathematics
1 answer:
sergiy2304 [10]4 years ago
5 0

Answer:

  x = 23

Step-by-step explanation:

The marked angles are "corresponding," hence congruent:

  8x -27 = 7x -4

  x = 23 . . . . . . . . . add 27-7x to both sides

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If we are testing for the difference between the means of 2 independent populations presuming equal variances with samples of n1
Musya8 [376]

Answer:

Null hypothesis: \mu_1= \mu_2

Alternative hypothesis:\mu_1 =\neq \mu_2

And for this case we assume that we have equal variances so that means:

\sigma =\sigma_1 =\sigma_2

For this case the degrees of freedom are given by:

df= n_1 +n_2 -2

And replacing we got:

df= 20+20 -2= 38

And the best answer would be:

a. 38

Step-by-step explanation:

For this problem we want to test the following:

Null hypothesis: \mu_1= \mu_2

Alternative hypothesis:\mu_1 =\neq \mu_2

And for this case we assume that we have equal variances so that means:

\sigma =\sigma_1 =\sigma_2

For this case the degrees of freedom are given by:

df= n_1 +n_2 -2

And replacing we got:

df= 20+20 -2= 38

And the best answer would be:

a. 38

3 0
4 years ago
2) Does the mapping diagram show a function?*
Gekata [30.6K]

Answer:

No

Step-by-step explanation:

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3 0
3 years ago
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Well the simplest power of 15^8 is 3^15 and the simplest form if 15^3 is 15^15 

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7 0
3 years ago
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