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2 years ago

I need to solve for x

Mathematics

1 answer:

goblinko [34]2 years ago

4 0

Answer:

116

Step-by-step explanation

Its parallel so it's gonna be the same... so X= 116

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Who knows this? I need help ASAP

snow_lady [41]

Answer:

A=674.5cm square

Step-by-step explanation:

First, using pythagoras theorem:

Cos x =2/5-90=66.4

This is angle ACD.

Then 1/2 absinC=1/2(5x4)sin66.4

=664.2cm square

Next, find angle DCB by 90-23.578=66.4

And angle CBD by 180-30-66.4=23.578

Use sin23.578=4.58/H

H=11.45cm(length of d)

Now, use 1/2absinC again to find the area of another part of the triangle.

1/2 11.45x4.5sin23.6=10.31cm square

Lastly add them up!

A=664.2-10.31cm =674.5cm square.

6 0

2 years ago

Among 2165 passenger cars in a particular region, 235 had only rear license plates. Among 330 commercial trucks, 50 had only r

serg [7]

Using the z-distribution, it is found that the p-value is of 0.0192.

At the null hypothesis, it is tested if commercial trucks owners do not violate laws requiring front license plates at a higher rate than owners of passenger cars, that is, the subtraction is of at most 0, hence:

$H_0: p_2 - p_1 \leq 0$

At the alternative hypothesis, it is tested if commercial truck owners violate the laws more, that is, the subtraction is positive, hence:

$H_1: p_2 - p_1 > 0$

For each sample, the size, the proportion and the standard error are given by:

$n_1 = 2165, p_1 = \frac{235}{2165} = 0.1085, s_1 = \sqrt{\frac{0.1085(0.8915)}{2165}} = 0.0067$

$n_2 = 330, p_1 = \frac{50}{330} = 0.1515, s_1 = \sqrt{\frac{0.1515(0.8485)}{330}} = 0.0197$

For the distribution of differences, the mean and the standard error are given by:

$\overline{p} = p_2 - p_1 = 0.1515 - 0.1085 = 0.043$

$s = \sqrt{s_1^2 + s_2^2} = \sqrt{0.0067^2 + 0.0197^2} = 0.0208$

The test statistic is given by:

$z = \frac{\overline{p} - p}{s}$

In which $p = 0$ is the value tested at the null hypothesis.

Hence:

$z = \frac{\overline{p} - p}{s}$

$z = \frac{0.043 - 0}{0.0208}$

$z = 2.07$

The p-value is found using a z-distribution calculator, for a right-tailed test, as we are testing if the proportion is more than a value, with z = 2.07.

Using the calculator, the p-value is of 0.0192.

A similar problem is given at brainly.com/question/15545277

5 0

2 years ago

Raina spent $32.91 on three shirts. If each shirt cost the same amount, how much does one shirt cost?

Dovator [93]

Answer:

$10.97 each

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

Is the following statement true or false? The intersection of a plane and a ray can be a line segment.

Alona [7]

Answer:

False

Step-by-step explanation:

Is the following statement true or false?

The intersection of a plane and a ray can be a line segment.

It is false. Correct one is the point.

8 0

3 years ago

Marsha jogged 7.8 miles. erica jogged 0.5 times as far. how far did erica jog?

wolverine [178]

Solve:-

7.8 × 0.5 = How far Erica jogged
7.8 × 0.5 = 3.9
3.9 Miles

So, if Marsha jogged 7.8 miles, and Erica jogged 0.5 times as far, as Marsha, Erica jogged 3.9 Miles.

Hope I helped ya!! xD

6 0

2 years ago