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mr Goodwill [35]
4 years ago
13

D and AC are chords that intersect at point Y. A circle is shown. Chords B C and A C intersect at point Y. The length of B Y is

3, the length of Y D is 8, the length of A Y is x, and the length of Y C is 6. What is the length of line segment AY? 2 units 3 units 4 units 6 units

Mathematics
1 answer:
marusya05 [52]4 years ago
7 0

Answer:

4 units

Step-by-step explanation:

see attachment for the missing figure.

to find the value of AY or x

We'll use intersecting chord theorem i.e  the product of line segment of each chord are equal.

From the figure, we can say that:

BY x YD = AY x YC

BY \times YD = AY \times YC\\3\times 8=x\times 6\\24=6x\\x=\frac{24}{6}\\x=4

Therefore,  AY = 4 units

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Can you help me find the test statistic AND Pvalue for a hypothesis test. The question is: In a survey respondents were asked wo
vitfil [10]

Answer:

Test statistic z=0.65

P-value=0.52

Fail to reject the null hypothesis.

Step-by-step explanation:

Here we have to perform a hypothesis test on the difference of proportions. We may want to answer if there is significant difference in the proportions of male and females.

The null and alternative hypothesis are:

H_0: \pi_1=\pi_2\\\\H_1: \pi_1\neq\pi_2

The significance level is defined as 0.05.

The YES proportion for females is:

p_1=33/98=0.337

The YES proportion for males is:

p_2=30/102=0.294

The weighted average of p can be calculated as:

p=\frac{n_1*p_1+n_2*p_2}{n_1+n_2}=\frac{33+30}{98+102}=0.315

With this p, we estimate the standard deviation

s=\sqrt{\frac{p(1-p)}{n_1}+\frac{p(1-p)}{n_2} }=\sqrt{\frac{0.315(1-0.315)}{98}+\frac{0.315(1-0.315)}{102} }=0.066

The test statistic z can be calculated as:

z=\frac{p_1-p_2}{s} =\frac{0.337-0.294}{0.066}=\frac{0.043}{0.066}=0.65

We can calculate the p-value for z, taking into account is a two-sided test

P(|z|>0.65)=0.52

The P-value (0.52) is greater than the significance level (0.05), so the effect is not significant. It failed to reject the null hypothesis.

We have enough evidence to conclude that the proportions that vote YES are different between genres.

8 0
4 years ago
2:7 = BLANK :21 BRAINLIEST
r-ruslan [8.4K]

Answer:

If these are ratios, then

2:7 = 6:21

7 0
3 years ago
Read 2 more answers
What is the graph of 3x + 5y = –15? Image for option 1 Image for option 2 Image for option 3 Image for option 4
Leokris [45]

The "intercept form" of the equation for a line is ...

... x/a + y/b = 1

where a and b are the x- and y-intercepts, respectively.

Dividing by -15 will put your equation into this form:

... 3x/-15 + 5y/-15 = 1

... x/(-5) + y/(-3) = 1

Your graph will go through the points (-5, 0) and (0, -3).

7 0
4 years ago
Length in the right triangle 7cm 10cm
horsena [70]
I think it would be 70 cm
5 0
4 years ago
Jaime knows that 30² is 900. He wonders if knowing that 30² can help him finds 29x31. Raquel knows what 25² equals. How can she
iragen [17]

9514 1404 393

Answer:

  Jaime: yes: 29·31 = 900 -1 = 899

  Raquel: 24·26 = 25^2 -1 = 624

Step-by-step explanation:

The difference of squares factors as the product of the sum and difference of the roots:

  a^2 -b^2 = (a -b)(a +b)

<u>Jaime</u>

  29·31 = (30 -1)(30 +1) = 30^2 -1^2 = 900 -1 = 899

  Jaime can subtract 1 from 30^2 to find 29·31

__

<u>Raquel</u>

  24·26 = (25 -1)(25 +1) = 25^2 -1^2 = 625 -1 = 624

  Raquel can subtract 1^2 from 25^2 to find 24·26.

3 0
3 years ago
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