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Marina CMI [18]
3 years ago
14

Through which angle of rotation does the image of a regular pentagon coincide with its preimage?

Mathematics
2 answers:
Volgvan3 years ago
6 0

Answer: B- 72

Step-by-step explanation:

STatiana [176]3 years ago
5 0

Answer:

Step-by-step explanation:

e

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Solve for x. x plus 15 = 60
Ilya [14]
X=45, if we use subtraction we see that 60-15 is 45 or X
6 0
3 years ago
Rewrite the function by completing the square. f(x)=x2−9x+14f(x)= x^{2} -9 x +14 f(x)=x 2 −9x+14 f, left parenthesis, x, right p
Volgvan

Answer:

x² - 9x + 14 by completing the square is (x - 9/2)² - 25/4

Step-by-step explanation:

Given x² - 9x + 14

To rewrite by completing the square, we need to write this in the form (a + b)² or (a - b)² without changing the value of the expression.

(a + b)² = a² + 2ab + b² (equation 1)

(a - b)² = a² - 2ab + b² (equation 2)

x² - 9x + 14 = x² - 2(x)(9/2) + (9/2)² - 25/4 (equation 3)

Comparing (equation 3) with (equation 1) and (equation 2), we can see that it takes the form of (equation 1), though, surplus of 25/4, where a = x, and b = 9/2.

So

x² - 2(x)(9/2) + (9/2)² = x² - 2(x)(9/2) + 81/4 = (x - 9/2)²

Which means

x² - 9x + 14

= x² - 2(x)(9/2) + 81/4 - 25/4

= x² - 2(x)(9/2) + (9/2)² - 25/4

= (x - 9/2)² - 25/4

And the square is completed.

6 0
3 years ago
9. A circle has a circumference of 34 meters. Which is the closest to its<br> radius?
UkoKoshka [18]

Answer:

5.414

Step-by-step explanation:

Formula to find circumference is 3.14 x 2r

So we can create a algebraic expression.

3.14 x 2r = 34 / 3.14 = 10.828 / 2 = 5.414

7 0
3 years ago
If the congruent angles of an isosceles triangle each measure 41°, what is the measure of
kotykmax [81]

Answer:

The third angle is equal to 98 degrees.

Step-by-step explanation:

All the angles add up to 180.

180 - (41 + 41) = 98

6 0
3 years ago
Rebecca is a Texas resident and she plans to attend Texas Tech for all 4 years of college. She has a yearly scholarship of $10,0
andrezito [222]

Answer:

To complete the required $m dollars for her college, she needs $(m - 60,000).

Step-by-step explanation:

Suppose Rebecca needs $m to complete her college education,

because she has a yearly scholarship of $10,000, she would have $10,000 × 4 = $40,000 for the four years she would spend in college.

Together with her savings of $20,000, she has $20,000 + $40,000 = $60,000 in total.

Therefore to complete the required $m dollars for her college, she needs $(m - 60,000).

5 0
3 years ago
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