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vovangra [49]
3 years ago
10

A.) it has no reflectional symmetry

Mathematics
1 answer:
coldgirl [10]3 years ago
5 0

Answer:

D.) It has rotational symmetry with an angle of rotation of 90 degrees.

Step-by-step explanation:

i) the shape shown in the figure has reflectional symmetry with four lines of symmetry. There are four lines of symmetry such that each line when drawn divides the shape into two exact halves such that if each half were too be folded across the line of symmetry it would produce the other half exactly.

Therefore Option A.) and Option B.) are not true

ii) It has  point symmetry which means if the shape is rotated by 180 degrees the shape does not change. Therefore Option C.) is not true.

iii) the shape has rotational symmetry because if the shape is rotated though any between 0 degrees and 360 degrees the shape appears to be unchanged.

Therefore the correct options are

D.) It has rotational symmetry with an angle of rotation of 90 degrees.

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The original price of a cell phone is $190. The sales tax is 4.9%. What is the total cost?
sashaice [31]

Answer:

$199.31

Step-by-step explanation:

To find the answer, you have to do 190 x 4.9%, which is $9.31. You can also do 190 x 4 9/10, which you need to make the 4 9/10 an improper fraction, which is 49/10. 190 x 49/10 is 9.31.   190 + 9.31 is the answer ($199.31)

6 0
3 years ago
140% of what number is 48
Montano1993 [528]
Percent means parts out of 100
140%=140/100=1.4
'of' means multiply
'is' means =
140% of what is 48 means
1.4 times what=48
divide both sides by 1.4
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3 years ago
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Solve the equation by completing the square.<br><br> 0 = 4x2 − 72x
Lyrx [107]

Answer:

B

Step-by-step explanation:

Given

4x² - 72x = 0 ← factor out 4 from each term

4(x² - 18x) = 0

To complete the square

add/subtract (half the coefficient of the x- term)² to x² - 18x

4(x² + 2(- 9)x + 81 - 81) = 0

4(x - 9)² - 4(81) = 0

4(x - 9)² - 324 = 0 ( add 324 to both sides )

4(x - 9)² = 324 ( divide both sides by 4 )

(x - 9)² = 81 ( take the square root of both sides )

x - 9 = ± \sqrt{81} = ± 9 ( add 9 to both sides )

x = 9 ± 9

Then

x = 9 - 9 = 0

x = 9 + 9 = 18

6 0
2 years ago
How do u calculate Pythagorean theorem and what is the formula
PIT_PIT [208]

Answer:

The formula is

Step-by-step explanation:

a^2 + b^2 = c^2

hope this helps

6 0
3 years ago
How do you graph inequalities on a number line?
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Step-by-step explanation:

the filled in circles are for anything less than or equal to or greater than or equal to.

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