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Studentka2010 [4]
4 years ago
15

Find the sizes of the angles marked with a letter. Why is my answer wrong?

Mathematics
1 answer:
jeyben [28]4 years ago
8 0

Answer:

29.28 degrees.

Step-by-step explanation:

sin x / 16.2 = sin 49 / 25

Cross multiply:

25 sin x = 16.2 * sin 49

sin x = (16.2 * sin 49) / 25

sin x = 0.48905

x = 29.28 degrees.

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What are the numbers x+ y = 17 x - y= 7
sammy [17]
X = 12 and y = 5

I found this out by starting out with x = 10 and y = 7 (because 10 + 7 equals 17), and escalating while trying out every number with both equations.
8 0
3 years ago
A bird's path is modeled by the following graph. Use the graph below to answer
VARVARA [1.3K]

Answer:

The greatest height the bird reached was 26 feet

At 5 seconds the bird was going down.

Step-by-step explanation:

3 0
2 years ago
A random sample of 100 recorded deaths in the United States during the past year showed an average life span of 71.8 years. Assu
Oliga [24]

Answer:

This indicates that the chances of the mean life span today is greater than 70 years is 0.5871

Step-by-step explanation:

The past year showed an average life span of 71.8 years.

\mu = 71.8 years

Population standard deviation = 8.9 years

\sigma = 8.9 years

We are supposed to find the mean life span today is greater than 70 years

i.e. P(X>70)

Formula : Z = \frac{x-\mu}{\sigma}

Z=\frac{70-71.8}{8.9}

Z=−0.202

P(X<70)=0.4129

P(X>70)=1-P(X<70)=1-0.4129=0.5871

Hence This indicates that the chances of the mean life span today is greater than 70 years is 0.5871

7 0
3 years ago
Read 2 more answers
You want to obtain a sample to estimate a population proportion. at this point in time, you have no reasonable estimate for the
Elis [28]

The sample size is, 9604 if you want to obtain a sample to estimate a population proportion at this point in time, you have no reasonable estimate for the population proportion.

<h3>What is the margin of error(MOE)?</h3>

It is defined as an error that gives an idea about the percentage of errors that exist in the real statistical data.

As we know, the sample size can be evaluated using the expression:

\rm ME = Z_c\sqrt{\dfrac{pq}{n}}

or

\rm n = \dfrac{Z^2}{ME^2}(pq)

Here ME = 1% = 0.01

p = 0.5, q = 0.5

Z at α 0.05   (because 95% confident)

= 1.960  

\rm n = \dfrac{1.960^2}{0.01^2}(0.5\times0.5)

n = 9604

Thus, the sample size is, 9604 if you want to obtain a sample to estimate a population proportion at this point in time, you have no reasonable estimate for the population proportion.

Learn more about the Margin of error here:

brainly.com/question/13990500

#SPJ1

5 0
2 years ago
The following angle measures could form a triangle
qaws [65]

Answer:

They don't form a triangle because all triangles degrees have to add up to 180 if you add them all up its 190 so no they don't form a triangle.

Step-by-step explanation:

84+75+31=190

8 0
3 years ago
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