1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
MaRussiya [10]
2 years ago
14

A regular polygon has 15 sides. Which is a possible angle of rotational symmetry for the figure? 12° 45° 72° 90°

Mathematics
2 answers:
iren2701 [21]2 years ago
7 0

Answer:

Option (3). 72°

Step-by-step explanation:

Angle of rotational symmetry = Central angle of a polygon

That means when we rotate the regular polygon by a central angle, polygon overlaps itself.

Central angle of a polygon with n sides = \frac{360}{n}

Where n = number of sides of the polygon

Therefore, central angle of a polygon with 15 sides = \frac{360}{15}

                                                                                     = 24°

Central angle tells us that after every 24° of rotation, polygon overlaps itself.

Angle of rotational symmetry may be 48°, 72°, 96°.....

Therefore, Option (3) is the possible angle of rotational symmetry.

Luda [366]2 years ago
5 0

Answer:

72

Step-by-step explanation:

took the test and 72 was correct

You might be interested in
Consider the following hypothesis test.H0:μ1−μ2=0 Ha:μ1−μ2≠0The following results are for two independent samples taken from the
Julli [10]

Answer:

a) z =\frac{104-106}{\sqrt{\frac{8.4^2}{80} +\frac{7.6^2}{70}}}= -1.53  

b) p_v =2*P(z

c) Since the p value is higher than the significance level provided we have enogh evidence to FAIL to reject the null hypothesis and we can't conclude that the true means are different at 5% of significance

Step-by-step explanation:

Information given

\bar X_{1}= 104 represent the mean for 1

\bar X_{2}= 106 represent the mean for 2

\sigma_{1}= 8.4 represent the population standard deviation for 1

\sigma_{2}= 7.6 represent the population standard deviation for 2

n_{1}=80 sample size for the group 1

n_{2}=70 sample size for the group 2

z would represent the statistic

Hypothesis to test

We want to check if the two means for this case are equal or not, the system of hypothesis would be:

H0:\mu_{1}=\mu_{2}

H1:\mu_{1} \neq \mu_{2}

The statistic would be given by:

z =\frac{\bar X_1-\bar X_2}{\sqrt{\frac{\sigma^2_1^2}{n_1} +\frac{\sigma^2_2^2}{n_2}}}=(1)

Part a

Replacing we got:

z =\frac{104-106}{\sqrt{\frac{8.4^2}{80} +\frac{7.6^2}{70}}}= -1.53

Part b

The p value would be given by this probability:

p_v =2*P(z

Part c

Since the p value is higher than the significance level provided we have enogh evidence to FAIL to reject the null hypothesis and we can't conclude that the true means are different at 5% of significance

6 0
3 years ago
X+y=2 2x^2+xy+1 Plz answer
iren2701 [21]

Answer:

answer is y^2-6y+9

Step-by-step explanation:

first take out the value of x from equation 1 which is x=(2-y)

then put the value of x in equation 2 u will get ur answer as y^2-6y+9

6 0
3 years ago
phillip watched a beach volleyball game from 1:45 pm to 2:00pm how many degrees did the minute hand turn?
Iteru [2.4K]
The answer is 15 or 1/4

I hope this helps you
6 0
3 years ago
If two points have the same __ or ____ coordinate, then they lie under same ____of the coordinate plane
Marina CMI [18]
Answer:
x, y, quadrant
7 0
3 years ago
Write these numbers in order of size.<br> Start with the smallest number.<br> 52 102 25 120 55
Anton [14]
The answer is 25 52 55 102 120
8 0
2 years ago
Read 2 more answers
Other questions:
  • Ugh help plz I don’t get this
    8·1 answer
  • What is 2k + 12 = -4?​
    11·2 answers
  • HELP!! ASAP!! PLEASE
    13·1 answer
  • What are the restrictions of the domain gºh?
    9·2 answers
  • Camp Elim obtains a $125,000, 6%, five-year loan for a new camp bus on January 1, 2021. If the monthly payment is $2,416.60, by
    10·1 answer
  • Lori can do 42 push-ups. this is ten less than twice the amount of push-ups her sister can do. how many push-ups can her sister
    15·1 answer
  • What percent of the dollar did Quentin find
    12·1 answer
  • Which mathematical property does this equation model? 6×1=6
    9·1 answer
  • HELP ME PLS WALLAHI HELP PLS
    15·1 answer
  • James completed 18 math problems. This is 30% of the problems he has to do. How many total math problems must he complete to be
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!