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-BARSIC- [3]
3 years ago
10

A total of 9 cycles have been observed during a time study. The mean for the largest element time = 0.80 min, and the correspond

ing sample standard deviation s = 0.15 min, which was also the largest. If the analyst wants to be 95% confident that the mean of the sample was within +/- 10% of the true mean, how many more observations should be taken?
Mathematics
1 answer:
aliya0001 [1]3 years ago
5 0

Answer:

Only one, more should be taken.

Step-by-step explanation:

See the attached file please.

Download pdf
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Use the elimination method to solve the system of equations. Choose the
Yakvenalex [24]

Answer:

(2, 7) is the correct ordered pair.

Step-by-step explanation:

5x + 3y = 31

2x + 3y = 25   Subtract to eliminate the y variable:

3x = 6

x = 6/3

x = 2.

Substitute x = 2 in the first equation:

5*2 + 3y = 31

3y = 31-10 = 21

y = 21/3

y = 7.

Check the result by substituting for x and y in the second equation:

2(2) + 3(7) = 25

4 + 21 = 25

25 = 25.

5 0
3 years ago
Which expression is equivalent to (2^3)^-5
Ostrovityanka [42]
Hi!

You didn't list the options, but I think I know the answer. Let me know if my answer isn't listed! :)

(x^{3} )^{-5}
We need to multiply the exponents.
3 · -5 = -15

The answer is 2^{-15}

Hope this helps! :)
3 0
3 years ago
Read 2 more answers
Find the domain: y= 6+9x 6− x−1
inna [77]

Answer:

Domain = {All real values of x EXCEPT x = -5 and x = 7}

Step-by-step explanation:

This is a rational function given as y=\frac{6+9x}{6-|x-1|}y=

6−∣x−1∣

6+9x

The domain is the set of all real value of x for which the function is defined.

For rational functions, we need to find which value of x makes the denominator equal to 0. We need to exclude those values from the domain.

Now

6 - |x-1| = 0

|x-1| = 6

x- 1 = 6

or

-(x-1) = 6

x = 6+1 = 7

and

-x+1=6

x = 1-6 = -5

So, the x values of -5 and 7 makes this function undefined. So the domain is the set of all real numbers except x = -5 and x = 7

3 0
3 years ago
Which property does the statement illustrate? Column A Column B 1. (p + 3) + q = p + (3 + q) 2. 8 + (9 + 4) = (8 + 9) + 4 3. 4(x
igomit [66]
The answer is associative property
6 0
2 years ago
Read 2 more answers
Can someone help with this question??
Scrat [10]

D 11 1/4

Step-by-step explanation:

3/4 + 1 1/2 is 2 1/4

2 1/4 x 5 is 11 1/4

8 0
2 years ago
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