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Katena32 [7]
3 years ago
7

Identify the transformation that maps the regular hexagon with a center (-7, 3.5) onto itself

Mathematics
2 answers:
Doss [256]3 years ago
8 0
The answer is D , because you rotate 120 degrees  clockwise 
mote1985 [20]3 years ago
4 0

Answer:

Option D - rotate 120° clockwise about (-7, 3.5) and reflect across the line x=-7              

Step-by-step explanation:

To identify : The transformation that maps the regular hexagon with a center (-7, 3.5) onto itself

Solution :

A regular hexagon which has 6 axes of symmetry.

So, the angle of rotational symmetry is given by 360 divides by number of sides.

\frac{360}{60}=60^\circ is the angle of rotational symmetry.

Since 90° is not a multiple of 60°, we will eliminate choices A and B.

120° is a multiple of 60°

So, it rotate clockwise 120°

Reflection across the line :

When you reflect a point across the line y = x, the x-coordinate and y-coordinate change places.

Which implies that the reflection across the line is x=-7

Therefore, Option D is correct that the transformation of a regular hexagon is

rotate 120° clockwise about (-7, 3.5) and reflect across the line x=-7

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3 years ago
Experts have predicted that approximately 1 in 12 tractor-trailer units will be involved in an accident this year. One reason fo
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Answer:

1. 564 tractor trailers

2. (0.2919, 0.4339)

3. It should be noted that there is 90% confidence that the true population proportion lies between 0.2919 and 0.4339.

Step-by-step explanation:

1)

Proportion= P = 0.8333333333333 (1/12)

Margin error= 0.06/2 = 0.03

Confidence level= 99

Significance level = α= (100 - 99)%= 1%= 0.01

α/2 = 0.01/2 = 0.0005

Sample size= n

= p(1 - p) (Z*/E)

=0.8333333333333 x (2.576/0.03)^2

=563.15

Approximately

=564

2) Sample size n= 124

Sample number of event x =45

Sample proportion = p= x/n

=45/124

= 0.3629

Standard error =√p(1 - p) /n

√(0.3629× (1 - 0.3629)/ 124

= 0.0432

Confidence level= 90

Significance level α= (100-90)% =0.01

Critical value Z* = 1.645

Margin of error = Z×Standard error= 1.645 × 0.0432= 0.07103

Lower limit = p- margin error= 0.3629 - 0.07103= 0.2919

Upper limit = p+margin error= 0.3629 + 0.07103= 0.4339

The answer is (0.2919, 0.4339)

3) It should be noted that there is 90% confidence that the true population proportion lies between 0.2919 and 0.4339.

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Answer:

\text{The scale is }\frac{1}{432}

Step-by-step explanation:

Length between the bases on a major league diamond = 90 feet

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