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KengaRu [80]
3 years ago
11

3. What three numbers are the Pythagorean triple generated by using 4 for x and 1 for y. Remember to use the formulas:

Mathematics
1 answer:
Doss [256]3 years ago
8 0

Given:

Consider the three number are given by:

a=x^2-y^2

b=2xy

c=x^2+y^2

To find:

The three numbers are the Pythagorean triple generated by using 4 for x and 1 for y.

Solution:

We have,

a=x^2-y^2

b=2xy

c=x^2+y^2

Substituting 4 for x and 1 for y, we get

a=4^2-1^2

a=16-1

a=15

Similarly,

b=2(4)(1)

b=8

And,

c=4^2+1^2

c=16+1

c=17

The three three numbers are the Pythagorean triple are 8,15 and 17.

Therefore, the correct option is C.

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Answer:

Null hypothesis:\mu \leq 8000  

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Step-by-step explanation:

1) Data given and notation  

\bar X=8300 represent the sample mean  

\sigma=1200 represent the population standard deviation  

n=64 sample size  

\mu_o =800 represent the value that we want to test  

\alpha represent the significance level for the hypothesis test.  

z would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

2) State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the mean is higher than 8000, the system of hypothesis are :  

Null hypothesis:\mu \leq 8000  

Alternative hypothesis:\mu > 8000  

Since we know the population deviation, is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:  

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}} (1)  

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

3) Calculate the statistic  

We can replace in formula (1) the info given like this:  

z=\frac{8300-8000}{\frac{1200}{\sqrt{64}}}=2  

4) P-value  

Since is a one-side upper test the p value would given by:  

p_v =P(Z>2)=0.0228  

5) Conclusion  

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