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2 years ago

Are these triangles simliar yes or no

Mathematics

2 answers:

NeTakaya2 years ago

5 0

Answer:

Please provide a photo.

Step-by-step explanation:

Deffense [45]2 years ago

3 0

Answer:

what triangle?

Step-by-step explanation:

I think you forgot to attach the image down below.

do u mind explaining it to me so I can help?

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What is the value of u? Please help.

Y_Kistochka [10]

u=60° as it is an equilateral triangle

5 0

2 years ago

Read 2 more answers

Use the results from a survey of a simple random sample of 1176 adults. Among the 1176 respondents, 77% rated themselves as abov

Serjik [45]

Using the sample data to test the hypothesis, we have that:

The actual number of respondents who rated themselves as above average drivers is 906.

The p-value of the test is 0, which is less than the standard significance level of 0.05, thus we can conclude that the proportion respondents who rated themselves as above average drivers is greater than 0.7.

77% of the sample of 1176 adults rated themselves as above average drivers, that is:

$0.77(1176) = 906$ .

Thus, the actual number of respondents who rated themselves as above average drivers is 906.

At the null hypothesis, we test if the proportion is $\displaystyle \frac{7}{10} = 0.7$ , that is:

$H_0: p = 0.7$

At the alternative hypothesis, we test if the proportion is greater than 70%, that is:

$H_1: p \geq 0.7$

The test statistic is given by:

$z = \frac{\overline{p} - p}{\sqrt{\frac{p(1-p)}{n}}}$

In which:

$\overline{p}$ is the sample proportion.
p is the proportion tested.
n is the size of the sample.

In this problem, the parameters are $\overline{p} = 0.77, p = 0.7, n = 1176$ .

Thus, the value of the test statistic is:

$z = \frac{\overline{p} - p}{\sqrt{\frac{p(1-p)}{n}}}$

$z = \frac{0.77 - 0.7}{\sqrt{\frac{0.7(0.3)}{1176}}}$

$z = 5.24$

The p-value of the test is the probability of finding a sample proportion above 0.77, which is 1 subtracted by the p-value of z = 5.24.

Looking at the z-table, z = 5.24 has a p-value of 1.

1 - 1 = 0.

The p-value of the test is 0, which is less than the standard significance level of 0.05, thus we can conclude that the proportion respondents who rated themselves as above average drivers is greater than 0.7.

A similar problem is given at brainly.com/question/24330815

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2 years ago

How do you estimate a right angle ?

Rom4ik [11]

Right angles are usually always 90 degrees, then if you are looking at right triangles, you have 45,45,90 degree triangles and 30,60,90 triangles

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3 years ago

What is cos theta when sin theta = sqrt 2/3

Fittoniya [83]

Answer:

Value of cosθ is ±√7/3 .

Step-by-step explanation:

According to the Question , value of :

$\red{\implies sin\theta = \dfrac{\sqrt2}{3}}$

And , we know the identity of sine and cosine as ,

$\boxed{\pink{\sf\implies sin^2\theta + cos^2\theta = 1} }$

Using , this identity we have ;

$\implies sin^2\theta + cos^2\theta = 1 \\\\\implies \bigg( \dfrac{\sqrt2}{3}\bigg)^2 + cos^2\theta = 1 \\\\\implies \dfrac{2}{9} + cos^2\theta = 1 \\\\\implies cos^2\theta = 1 - \dfrac{2}{9} \\\\\implies cos^2\theta = \dfrac{9-2}{9} \\\\\implies cos\theta = \sqrt{\dfrac{7}{9}} \\\\\underline{\boxed{\blue{\bf \implies cos\theta = \pm \dfrac{\sqrt 7 }{3}}}}$