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defon
2 years ago
12

If f(x)=5x-2 and g(x)=2x+1, find (f-g)(x)

Mathematics
1 answer:
yarga [219]2 years ago
3 0

5x-2-2x+1=3x-1

Combine all like terms

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Suppose we have a population whose proportion of items with the desired attribute is p = 0:5. (a) If a sample of size 200 is tak
crimeas [40]

Answer:

a. If a sample of size 200 is taken, the probability that the proportion of successes in the sample will be between 0.47 and 0.51 is 41.26%.

b. If a sample of size 100 is taken, the probability that the proportion of successes in the sample will be between 0.47 and 0.51 is 30.5%.

Step-by-step explanation:

This problem should be solved with a binomial distribution sample, but as the size of the sample is large, it can be approximated to a normal distribution.

The parameters for the normal distribution will be

\mu=p=0.5\\\\\sigma=\sqrt{p(1-p)/n} =\sqrt{0.5*0.5/200}= 0.0353

We can calculate the z values for x1=0.47 and x2=0.51:

z_1=\frac{x_1-\mu}{\sigma}=\frac{0.47-0.5}{0.0353}=-0.85\\\\z_2=\frac{x_2-\mu}{\sigma}=\frac{0.51-0.5}{0.0353}=0.28

We can now calculate the probabilities:

P(0.47

If a sample of size 200 is taken, the probability that the proportion of successes in the sample will be between 0.47 and 0.51 is 41.26%.

b) If the sample size change, the standard deviation of the normal distribution changes:

\mu=p=0.5\\\\\sigma=\sqrt{p(1-p)/n} =\sqrt{0.5*0.5/100}= 0.05

We can calculate the z values for x1=0.47 and x2=0.51:

z_1=\frac{x_1-\mu}{\sigma}=\frac{0.47-0.5}{0.05}=-0.6\\\\z_2=\frac{x_2-\mu}{\sigma}=\frac{0.51-0.5}{0.05}=0.2

We can now calculate the probabilities:

P(0.47

If a sample of size 100 is taken, the probability that the proportion of successes in the sample will be between 0.47 and 0.51 is 30.5%.

8 0
2 years ago
How many whole numbers have a sum of 40
Olenka [21]
In a positive integers there are twenty whole numbers I hope this help
7 0
2 years ago
Could the table x,y pairs have been generated by a linear function x 1,2,3,4 y 3,5,7,9
Serjik [45]
Thanks for the link tysmmmmmm
8 0
3 years ago
Which of the following statements is not true about corresponding sides?. . A.They are proportional for similar polygons.. . B.T
adell [148]
The correct answer among the choices listed is option C. The statement that is not true about corresponding sides is that they are connected by a vertex. Corresponding sides are not connected, they are separate parts in similar polygons.
5 0
2 years ago
Which expression shows how to convert 60 hours to days? G0 hours 24 days 60 hours 1 day 24 hours 60 hours 24 hours 1 day 0 60 ho
Hatshy [7]

Answer:

given :

24 hours = 1 day

now

60 hours = 60 / 24 = 2.5 days

4 0
3 years ago
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