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UNO [17]
3 years ago
11

Calculate the angles of a parallelogram if the sum of the three angles is 310°

Mathematics
1 answer:
Gennadij [26K]3 years ago
8 0

9514 1404 393

Answer:

  adjacent angles are 50° and 130°

Step-by-step explanation:

The sum of all 4 angles in a parallelogram is 360°, so the fourth angle must be ...

  360° -310° = 50°

Adjacent angles are supplementary, so the other two angles must be ...

  180° -50° = 130°

The angles in the parallelogram are either 50° or 130°. Adjacent angles are different.

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The graphic below shows a protractor, which is used to measure angles . What is the level of accuracy of the measurement tool ?
Oksanka [162]

Answer:

Pretty...accurate

Step-by-step explanation:

It's pretty accurate

5 0
3 years ago
Read 2 more answers
According to a survey, the average American person watches TV for 3 hours per week. To test if the amount of TV in New York City
Neporo4naja [7]

Answer:

Test statistic (t-value) of this one-mean hypothesis test is -2.422.

Step-by-step explanation:

We are given that according to a survey, the average American person watches TV for 3 hours per week. She surveys 19 New Yorkers randomly and asks them about their amount of TV each week, on average. From the data, the sample mean time is 2.5 hours per week, and the sample standard deviation (s) is 0.9 hours.

We have to test if the amount of TV in New York City is less than the national average.

Let Null Hypothesis, H_0 : \mu \leq 3  {means that the amount of TV in New York City is less than the national average}

Alternate Hypothesis, H_1 : \mu > 3   {means that the amount of TV in New York City is more than the national average}

The test statistics that will be used here is One-sample t-test statistics;

        T.S. = \frac{\bar X - \mu}{\frac{s}{\sqrt{n} } } ~ t_n_-_1

where, \bar X = sample mean time = 2.5 hours per week

             s = sample standard deviation = 0.09 hours

             n = sample size = 19

So, <u>test statistics</u> = \frac{2.5 - 3}{\frac{0.9}{\sqrt{19} } } ~ t_1_8

                              = -2.422

Therefore, the test statistic (t-value) of this one-mean hypothesis test (with σ unknown) is -2.422.

8 0
3 years ago
One Solution<br> 6-3+4x+1=
Volgvan

+4x +2 = 0

4x = -2

x = -0.5 = -1/2

6 0
3 years ago
Read 2 more answers
12 POINTS 12 POINTS 12 POINTS 12 POINTS 12 POINTS 12 POINTS 12 POINTS 12 POINTS
Mashcka [7]
<h2>Answer:</h2>

m∠A = mDE - mBC

x° = 116° - 64°

x° = 52°.

Therefore, m∠A equal to 52°.

<u>Correct choice</u> - [D] 52°.

3 0
3 years ago
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Find the height of a cylinder with a volume of 410in and a radius of 4 inches. Round your answer to the nearest hundredth.
Ivahew [28]

Volume of a cylinder = pi x r^2 x height.

Using the given information:

410 = pi x 4^2 x height

410 = 50.24 x height

Height = 410/50.24

Height = 8.16 inches

3 0
3 years ago
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