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Zielflug [23.3K]
2 years ago
15

Solve each linear Any quality other than all real numbers graph the solution set on a number line​

Mathematics
1 answer:
Mekhanik [1.2K]2 years ago
7 0
Type the problem in the app it self , the answer will be there hopefully
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I NEED HELP NOWWWW!!!
Lorico [155]

Answer:

I dont know because your picture is sideways and i cannot think whilst my head is tilting sideways to view a problem. Sorry,

Step-by-step explanation:

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2 years ago
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Marysya12 [62]

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the first i think

Step-by-step explanation:

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2 years ago
Assume that the helium porosity (in percentage) of coal samples taken from any particular seam is normally distributed with true
aev [14]
A) 4.85\pm0.29
B) 4.56\pm0.45

We first find the z-score associated with the level of confidence.  For 95% confidence:
Convert 95% to a decimal:  0.95
Subtract from 1:  1-0.95 = 0.05
Divide by 2 (this is the area in the tails):  0.05/2 = 0.025
Subtract from 1 (we don't want the tails, we want the area in the middle):  1-0.025 = 0.975

Using a z-table (http://www.z-table.com) we find the z-score for this is 1.96.  We now use the formula
\overline{x} \pm z*(\frac{\sigma}{\sqrt{n}})
=4.85\pm 1.96*(\frac{0.75}{\sqrt{25}})=4.85\pm0.294\approx 4.85\pm 0.29

For a 98% confidence level:
Convert 98% to a decimal:  0.98
Subtract from 1:  1 - 0.98 = 0.02
Divide by 2:  0.02/2 = 0.01
Subtract from 1:  1 - 0.01 = 0.99

Using the z-table we see the closest number to this is for the z-score 2.33:
\overline{x} \pm z* (\frac{\sigma}{\sqrt{n}})
=4.56\pm 2.33*(\frac{0.75}{\sqrt{15}})=4.56\pm0.45
7 0
3 years ago
What is the volume of the prism below?
Darina [25.2K]

Answer:

5.12 x 4 x 4.11

=84.17

= \frac{84.17}{2}  \\  = 42.09

6 0
2 years ago
If a-1/a = 8 find the value of (a+1/a) square​
Strike441 [17]

Answer:

(1) a+1/a=8a+2/8a+1

(2) a²-1/a²=(a+1)(a-1))a²

(8a+2)(8a)/(8a+1)²

8 0
2 years ago
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