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3 years ago

Please answer this. you will get branliest if u do

Mathematics

2 answers:

Shalnov [3]3 years ago

8 0

Let’s first find the angle y
Angle y = 180-(140+10)(angle sum property)
Angle y = 180-150
Angle y = 30 degrees
Angle x = 180- 110 ( linear pair )
Angle x = 70
Angle z = 180-(70+90)( angle sum property)
Angle z = 180-160
Angle z = 20

dsp733 years ago

7 0

Answer:

$x=70\\z=20\\y=30$

Step-by-step explanation:

Angles on a straight line add up to 180°.

$x=180-110$

$x=70$

Angles in a triangle add up to 180°.

$z=180-90-70$

$z=20$

The 3 angles in the whole triangle add up to 180°.

$y=180-40-90-20$

$y=30$

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Answer:

B) 43.82 feet/sec

Step-by-step explanation:

Fill in the number and evaluate:

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3 years ago

Suppose you are standing in a parking lot near a building, and the winter air temperature is 0 degrees Celsius. At that temperat

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Given data;

Speed of sound = 331 meters per second

Time = 0.7 sec

The distance from the building is;

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2 years ago

A confidence interval was used to estimate the proportion of statistics students that are female. A random sample of 72 statisti

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Answer:

We need a sample of size at least 13.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

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So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

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We need a sample of size at least n.

n is found when M = 0.08. So

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$0.08 = 1.96\sqrt{\frac{0.54*0.46}{n}}$