find the area and perimeter of a 30-gon with a radius of 1

Answers

Answer 1

Answer:

Here :D

Step-by-step explanation:

look at one of the 30 central triangles.

Each will be isosceles with a vertex angle of 12°

base^2 = 1^2 + 1^2 - 2(1)(1)cos12°

= 2 - 2cos12°

so the perimeter is 30(2 - 2cos12°)

= 60 - 60cos12°

use your calculator if you need a decimal answer.


Related Questions

One lap around a track is equal to 1/4 of a mile. A horse ran a distance of 9 laps in 2 minutes and 30 seconds. What was the horse's average speed in miles per minute? Need Help!! ​

Answers

2:30 is equal to 150 seconds
So the horse ran 2.25 miles in 150 seconds
To find the mile time in seconds divide 150 by 2.25 which equals 66.7sec per mile but it’s asking miles per minute and one mile is over a min so he runs Less than one mile per minute. So now you must divide 60 by 66.7 to find that he runs .89 miles per min.

PLEASE ANSWER THIS QUESTION RIGHT.What do we call the graph of a quadratic?

Answers

Answer:

parabola

Step-by-step explanation:

Which description is paired with its correct expression? two less than the quotient of a number cubed and four, increased by eight; 2 minus StartFraction n cubed Over 4 EndFraction + 8 six times the difference of five and a number squared; 6 (n squared minus 5) three more than the quotient of nine and a number cubed, decreased by two; 3 + StartFraction 9 Over n cubed EndFraction minus 2 twice the difference of a number squared and three; 2 n squared minus 3

Answers

Answer:

Three more than the quotient of nine and a number cubed, decreased by two; 3 + StartFraction 9 Over n cubed EndFraction minus 2

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

i took the review

Describe the transformation f(x) = Vx+ 1 - 5 in words.
The parent function f(x) = V has been shifted
1 unit and
5 units

Answers

Answer:

The translation is 1  unit to the left and  5 units down

Step-by-step explanation:

The explanation is given below;

Given that

The transform function is [tex]f(x) = \sqrt{x+1} - 5[/tex]

It can be seen that

The parent function is

[tex]f(x) = \sqrt{x}[/tex]

After that

The parent function would be transform 1 units to the left [tex]\sqrt{x+1}[/tex]

And afterwards it would be transform in 5 units down [tex]\sqrt{x+1} - 5[/tex]

So

The parent function [tex]f(x) = \sqrt{x}[/tex] would be  translate in 1  unit to the left and  5 units down

Answer:

The translation is 1  unit to the left and  5 units down

Step-by-step explanation:

A telescope is being built using a hyperbolic mirror and parabolic mirror that share a focus. The hyperbolic mirror can be modeled using the equation (y-1)^2/144 - (x+4)^2/25 =1, and the parabolic mirror opens downward and has a vertex at (-4,-10). What are the coordinates of the focus they share?

Answers

Answer:

C. (-4, -12)

Step-by-step explanation:

Answer:

My fellows, I know how painful it is in Pearson so I want to help you guys.

1. B

2. D

3. A

4. D

5. C

Step-by-step explanation: 100% correct I took it

You get about 32 homework assignments every 4 weeks. Circle
equation that models this.


Use your equation to determine the number of homework
assignments you get after 9 weeks.

Answers

the answer is C, because your homework assignments (h) is equal to 8 (Amount of assignments in one week) times the number of weeks.

Which of the following is the graph of y= -√ x + 1?

Answers

Answer:

check

Step-by-step explanation:

y intercept = (0,1)

x intercept = (1,0)

Answer:

Answer below hopes it helps

Step-by-step explanation:

Asanji's school is selling tickets to a spring musical. On the first day of ticket sales the school
sold 1 adult ticket and 1 student ticket for a total of $18. The school took in $57 on the second
day by selling 3 adult tickets and 4 student tickets. Find the price of an adult ticket and the price
of a student ticket.

Answers

Answer:

j

Step-by-step explanation:

Answer: The price of adult ticket is $ 13and child ticket is $12.Hope this will help u.....

Step-by-step explanation:

For this polynomial identify the coefficients and degree of each term.

Answers

Step-by-step explanation:

first term

degree 1

coefficient 4

second term

degree. 2

coefficient 8

third term

degree 3

coefficient -5

fourth term

degree 4

coefficient -5

fifth term

degree 0

coefficient -5

match the graph to the equation

Answers

The first equation matches the last graph.

The second equation matches the first graph.

The last equation matches the second graph.

(I can’t upload the other two graphs but let me know if you want me to put the process, step by step)

What are the variables in the expression 2w + 11t + 4y

A 2, 11, and 4

B w, t, and y

C 17

D 2w, 11t, and 4y

Answers

9514 1404 393

Answer:

  B.  w, t, and y

Step-by-step explanation:

Delete the numbers and the math operators and what you have left are variables. You will want to eliminate any duplicates from the list (there aren't any duplicate).

The variables are w, t, y.

Answer:

Option B

Step-by-step explanation:

Definition of variables: Variables are terms that have no coefficients.

To look for variables in the expression 2w + 11t + 4y, simply look for the variables (letters) in the expression. We can see that the variables are w, t, and y, which matches Option B.

Hence, Option B is correct.

Please help!!! Will give brainliest!!!

Answers

Answer:

12 shares

Step-by-step explanation:

If and are the radi of two concentric circles and (r. > r.). If the chord
of the larger circle AB touches the inter circle. Find the value of AB​

Answers

Answer:

r1 and r2 are the radii of two concentric circles

To find:

The length of the chord of the larger circle.

Solution:

We have given the two concentric circles which means both the circles have the same centre.

The chord of the larger circle toches the inner circle so the chord of the larger circle will be the tangent of the smaller circle.

And we know that the radius of the circle is perpendicular to the tangent of the circle.

Let 2x be the length of the chord of the circle.

r1 is the radius of the larger circle.

r2 is the radius of the smaller circle.

So by the Pythagoras theorem,

The length of the half of the chord is given by:

r1² = x² + r2²

x² = r1² - r2²

x = √r1² - r2²

So,

The length of the chord will be 2x = 2√r1² - r2² units

Step-by-step explanation:

What is the difference between 49 8/9 and 17 1/3

Answers

Answer:

49 8/9 - 17 1/3 = -5/3 or -1 2/3

what theorem can be used to prove the 2 triangles similar?

Answers

Answer:

C. SSS

Step-by-step explanation:

[tex] \frac{AB}{SQ} = \frac{AC}{SR} = \frac{BC}{QR} = 2 [/tex]

Thus, the ratio of the corresponding side lengths of both triangles are equal. This implies that all three corresponding side lengths of both triangles are proportional to each other.

Consequently, based on the SSS Criterion, we can conclude that both triangles are similar to each other.

tell whether the sequence is arithmetic . if it is what is the comon difference -12, -7, -2 , 3

Answers

yes it’s arithmetic, common difference: +5

Answer:The derivative would relate to common differences or slope on a graph or acceleration of slope aka speed

Here +5

Step-by-step explanation:

Which graphs are inverses of one another? Graph A and B Graph A and C Graph B and C none of the graphs shown On a coordinate plane, graph A is in quadrants 1, 2, 3. Graph A is rotated across the x-axis to form graph B. Graph A is rotated and reflected across the axis to form Graph C.

Answers

Answer:

the answer is B (graph a and c)

just did the test on edg 21

Step-by-step explanation:

i hope this helps!! have an amazing day <3

If a graph is reflected across y = x then it will be an inverse graph so graphs B and C will be inverse.

What is the inverse of a function?

The inverse of a function is basically a reverse function or undo of the function.

For example y = f(x) then inverse will be x = f(y).

It means in the inverse function we need to interchange x and y.

Another example y = 3x² ⇒ x = √(y/3) will be the inverse.

An inverse function is a reflection of graph across y = x and due to that coordinate will interchange its that ;

( x ,y ) → ( y , x )

Since graph A is rotated about the x-axis to make graph B

Now,

Graph A is rotated( which is B ) and reflected across the axis y = x to form Graph C.

So B and C will be the inverse of each other.

Hence "If a graph is reflected across y = x then it will be an inverse graph so graphs B and C will be inverse".

For more information about the inverse of a function,

brainly.com/question/2541698

#SPJ2

The given question is incomplete complete question is ;

Which graphs are inverses of one another? Graph A and B Graph A and C Graph B and C none of the graphs shown On a coordinate plane, graph A is in quadrants 1, 2, and 3. Graph A is rotated across the x-axis to form graph B. Graph A is rotated and reflected across the axis y = x  to form Graph C.

Derrick needs to sell a minimum of 100 orders each month to make it into the sales winners circle. He has already sold 45 orders this month. He still needs to sell s more orders.

Which inequality can be used to find the possible values for s?

Answers

s>=55

He needs to sell a MINIMUM of 100 orders which means that he can send 100 or more. If he’s already sold 45 then he needs to sell AT LEAST 55 more which means that the variable s, sales left, is greater than or equal to 55

sin(x)=0.2 What is x

Answers

Solve the trigonometric equation by isolating the function and then taking the inverse. Use the period to find the full set of all solutions.
x
=
0.20135792
+
2
π
n
,
2.94023473
+
2
π
n
x
=
0.20135792
+
2
π
n
,
2.94023473
+
2
π
n
, for any integer

f(x) = x2 + 6x + 4
What is the increasing and decreasing

Answers

9514 1404 393

Answer:

decreasing: (-∞, -3)increasing: (-3, ∞)

Step-by-step explanation:

The leading coefficient is positive, so you know the parabola opens upward.

The ratio -b/(2a) is -6/(2·1) = -3, so you know the axis of symmetry is x = -3. The function will be decreasing from negative infinity to the vertex at x = -3, and will be increasing from there to positive infinity. At the vertex (x=-3), the function is neither increasing nor decreasing.

decreasing: (-∞, -3)increasing: (-3, ∞)

_____

Additional comment

For ax^2 +bx +c, the axis of symmetry is x=-b/(2a). The vertex (turning point) is on the axis of symmetry.

Solve for x, given the attached image.

Answers

Answer:

x = 8

Step-by-step explanation:

Central angle = measure of intercepted arc

Central angle = 47°

Arc measure = 7 + 5x

Therefore:

7 + 5x = 47

Subtract 7 form both sides

5x = 47 - 7

5x = 40

Divide both sides by 5

x = 40/5

x = 8

Find the perimeter of the polygon.

Answers

9514 1404 393

Answer:

  30 in

Step-by-step explanation:

The enclosing rectangle is 4 by 10, so has a perimeter of ...

  P = 2(L+W) = 2(10+4) = 28

The notch adds 2 inches to the perimeter, so the total of all side lengths is ...

  28 +2 = 30 . . . inches

the premiter of the polygon is 30 inches

1.
El año pasado, un orador motivacional llamado Rhiannon dio 20 charlas en el extranjero. Este año, dio
13 charlas en el extranjero. ¿Cuál es el porcentaje de disminución de las charlas en el extranjero del
año pasado a este año?
A. 75%
B. 40%
C. 35%

Answers

75% of the chakras en el extranjero

f(x)=2x-11
FIND x when f(x)= -17

Answers

F(x)=2x-11
2(-17)-11
-34-11
-45
The answer is x=-45

Answer:

[tex]f(x) = 2x - 11 \\ f (x)= 2( - 17) - 11 \\ \\ f(x) = - 34 - 11 \\ f(x) = - 45[/tex]

Pls help me #7thgrademath

Answers

ovovovovovovovovoovovoovovovovovovoovovovo

Answer:

68 degrees

Step-by-step explanation:

180 - 90 = 90

90 - 22 = 68

The angle is 68

Which measure of central tendency best describes the data set below?


{1, 2, 3, 4, 5, 6, 12, 23}

A. the mean, 7
B. the mode, 4
C. the range, 22
D. the median, 4.5

Answers

Answer:

It is the mean

Step-by-step explanation:

Which measure of central tendency best describes the data set below?

{1, 2, 3, 4, 5, 6, 12, 23}

=mean

56 Divided by 8=7 mean=7

It’s a. the mean, 7 Or d. the median, 4.5

Can someone please help

Answers

Answer:

340

Step-by-step explanation:

1) Base
2)Median
3)Altitude
4)Hypotenuse

Answers

Answer:

Altitude

Step-by-step explanation:

AD is the height\altitude. It shows the distance from the base to the highest point of a triangle.

Answer:

altitude

Step-by-step explanation:

What is the height of the cone below?

Answers

Answer:

Where's the cone at and I might be able to help

Step-by-step explanation:

Answer: Please put a picture of the cone underneath the question!

Step-by-step explanation:

Solve the equation d/3=11

Answers

Final Answer: [tex]d = 33[/tex]

Steps/Reasons/Explanation:

Question: Solve the equation [tex]\frac{d}{3} = 11[/tex].

Step 1: Multiply both sides by [tex]3[/tex].

[tex]d = 11[/tex] × [tex]3[/tex]

Step 2: Simplify [tex]11[/tex] × [tex]3[/tex] to [tex]33[/tex].

[tex]d = 33[/tex]

~I hope I helped you :)~

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