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LekaFEV [45]
3 years ago
15

I KEE asking so many questions lol I just don’t understand!

Mathematics
1 answer:
Agata [3.3K]3 years ago
6 0

Answer:

Perimeter = 20

Step-by-step explanation:

Perimeter = 9 + 5 + 6

Best Regards!

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What is the solution to this system of linear equations? y − 4x = 7 2y + 4x = 2 (3, 1) (1, 3) (3, −1) (−1, 3)
ohaa [14]
Y - 4x = 7...y = 4x + 7
now sub 4x + 7 in for y in the other equation
2y + 4x = 2
2(4x + 7) + 4x = 2
8x + 14 + 4x = 2
12x = 2 - 14
12x = - 12
x = -1

y - 4x = 7
y - 4(-1) = 7
y + 4 = 7
y = 7 - 4
y = 3

solution is : (-1,3)
7 0
4 years ago
Read 2 more answers
Which function in Excel is used to perform a test of independence? a. T.TEST b. CHISQ.TEST c. NORM.S.DIST d. Z.TEST
denis23 [38]

Answer:

b. CHISQ.TEST

Step-by-step explanation:

Notation and previous concepts

A chi-square test is "used to test if the variance of a population is equal to a specified value. This test can be either a two-sided test or a one-sided test. The two-sided version tests against the alternative that the true variance is either less than or greater than the specified value"

The statistic is given by:

\chi^2 = \sum_{i=1}^n \frac{(O_i-E_i)^2}{E_i}

In order to calculate the p value we need to have in count the degrees of freedom , on this case df=(rows-1)(#cols-1). And we can calculate the p value would be given by:

p_v =P(\chi^2 >\chi^2_{calc})

But the correct comand is given by:

b. CHISQ.TEST(Actual range, Expected range)

We just need to put in one column the Observed values and in other the expectec values.

3 0
3 years ago
Choose 1 answer:
AlladinOne [14]

Answer

B

Explain:I got it right definitely didn't search it up

but I promise it's right

8 0
3 years ago
Find the missing side of each triangle using the pythagorean theorem
Aliun [14]

Answer:

10km

Step-by-step explanation:

6^2+8^2=100

sqrt 100=10

6 0
3 years ago
Write in slope-intercept form an equation of a line that passes through the point (8, 2) that is perpendicular to the graph of t
Citrus2011 [14]

Answer:

y= -1/4 x + 4

5 0
3 years ago
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