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Vedmedyk [2.9K]
2 years ago
8

What are the values of x and y?​

Mathematics
1 answer:
vitfil [10]2 years ago
4 0

Answer:

Step-by-step explanation:

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A dice is rolled 2 times. What is the probability of showing a 5 on every roll Round to 4 decimal places
AlexFokin [52]

Answer:

0.0278

Step-by-step explanation:

(1/6)(1/6) = 1/36 = 0.0278

3 0
3 years ago
How does understanding the characteristics of public speaking affect how you view a speech?
umka2103 [35]

Answer:

I think its C

Step-by-step explanation:

By learning characteristics of a speech, It should be easier to determine the impact of a specific speech.

3 0
3 years ago
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The mean preparation fee H&R Block charged retail customers in 2012 was $183 (The Wall Street Journal, March 7, 2012). Use t
astraxan [27]

Answer:

a)0.6192

b)0.7422

c)0.8904

d)at least 151 sample is needed for 95% probability that sample mean falls within 8$ of the population mean.

Step-by-step explanation:

Let z(p) be the z-statistic of the probability that the mean price for a sample is within the margin of error. Then

z(p)=\frac{ME*\sqrt{N}}{s } where

  • Me is the margin of error from the mean
  • s is the standard deviation of the population
  • N is the sample size

a.

z(p)=\frac{8*\sqrt{30}}{50 } ≈ 0.8764

by looking z-table corresponding p value is 1-0.3808=0.6192

b.

z(p)=\frac{8*\sqrt{50}}{50 } ≈ 1.1314

by looking z-table corresponding p value is 1-0.2578=0.7422

c.

z(p)=\frac{8*\sqrt{100}}{50 } ≈ 1.6

by looking z-table corresponding p value is 1-0.1096=0.8904

d.

Minimum required sample size for 0.95 probability is

N≥(\frac{z*s}{ME} )^2 where

  • N is the sample size
  • z is the corresponding z-score in 95% probability (1.96)
  • s is the standard deviation (50)
  • ME is the margin of error (8)

then N≥(\frac{1.96*50}{8} )^2 ≈150.6

Thus at least 151 sample is needed for 95% probability that sample mean falls within 8$ of the population mean.

7 0
3 years ago
What is close to 3/4? is it 13/26, 11/32, 1/2, or 3/8​
jonny [76]

Answer:

1/2 is the closest at .5

Step-by-step explanation:

13/26 is 1/2

3/8 is . 375

11/32 is .344

3 0
3 years ago
Read 2 more answers
X^72-3x^24+x^13+2x^7-x+1/x+1
Basile [38]
Do you need me to simplify ... or what?
Please let me know so I can help you (:
7 0
3 years ago
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