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Mrrafil [7]
3 years ago
15

Question 24 of 25 Use the quadratic formula to find the solutions to the equation. x² – 3x+1=0

Mathematics
1 answer:
user100 [1]3 years ago
3 0
I think the answer is B! Hope this helps!
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Test the claim that the proportion of people who own cats is significantly different than 80% at the 0.2 significance level. The
sattari [20]

Answer:

C. H0 : p = 0.8 H 1 : p ≠ 0.8

The test is:_____.

c. two-tailed

The test statistic is:______p ± z (base alpha by 2) \sqrt{\frac{pq}{n} }

The p-value is:_____. 0.09887

Based on this we:_____.

B. Reject the null hypothesis.

Step-by-step explanation:

We formulate null and alternative hypotheses as  proportion of people who own cats is significantly different than 80%.

H0 : p = 0.8 H 1 : p ≠ 0.8

The alternative hypothesis H1 is that the 80% of the  proportion is different and null hypothesis is , it is same.

For a two tailed test for significance level = 0.2 we have critical value  ± 1.28.

We have alpha equal to 0.2  for a two tailed test . We divided alpha with 2 to get the answer for a two tailed test. When divided by two it gives 0.1 and the corresponding value is ± 1.28

The test statistic is

p ± z (base alpha by 2) \sqrt{\frac{pq}{n} }

Where p = 0.8 , q = 1-p= 1-0.8= 0.2

n= 200

Putting the values

0.8 ± 1.28 \sqrt{\frac{0.8*0.2}{200} }

0.8 ± 0.03620

0.8362, 0.7638

As the calculated value of z lies within the critical region  we reject the null hypothesis.

8 0
3 years ago
I need help on this question pls​
Ivanshal [37]

Answer:

t = 17.5 f = 12

Step-by-step explanation:

If <em>MNOP </em>is a square, you know that each angle is going to be 90°. To solve, let's first set each equation equal to 90°:

90 = 4t + 20

and

90 = 7f + 6

Then solve both equations:

90 = 4t + 20 \\ 70 = 4t \\ 17.5 = t

and

90 = 7f + 6 \\ 84 = 7f \\ 12 = f

I hope that helps!

7 0
2 years ago
The values in the table represent a function.?
djyliett [7]

f(3) is -2

f(x) = -5 when x is 4

8 0
3 years ago
Read 2 more answers
3w = -27 (equation) ​
kotykmax [81]
W=-9

Explanation: 3w=-27

Divide 3 from -27

-27 divided by 3 = -9
5 0
3 years ago
Read 2 more answers
What does the x-intercept sometimes represent in a real world problem
UNO [17]
I think it represents where something is starting from, like something growing up (a chart with rising numbers)
3 0
3 years ago
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