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
katrin2010 [14]
3 years ago
6

How many regular triangles meet at a vertex to form a regular tessellation?

Mathematics
2 answers:
erastovalidia [21]3 years ago
7 0
D.) Six <span>regular triangles meet at a vertex to form a regular tessellation

Hope this helps!</span>
nirvana33 [79]3 years ago
4 0
6 regular triangles meet at vertex to form a regular tessellation.

Answer is D.

Hope it helps!
You might be interested in
PLEASE HELP ILL MARK BRAINLIEST !!!
Alexus [3.1K]

Answer:

a) the common difference is 20

b) x_8=115 , x_{12}=195

c) the common difference is -13

d) a_{12}=52, a_{15}=13

Step-by-step explanation:

a) what is the common difference of the sequence xn

Looking at the table, we get x_3=16, x_4=36 and x_5= 56

Deterring the common difference by subtracting x_4 from x_3 we get

36-16 =20

So, the common difference is 20

b) what is x_8? what is x_12

The formula used is: x_n=x_1+(n-1)d

We know common difference d= 20, we need to find x_1

Using x_3=16 we can find x_1

x_n=x_1+(n-1)d\\x_3=x_1+(3-1)d\\15=x_1+2(20)\\15=x_1+40\\x_1=15-40\\x_1=-25

So, We have x_1 = -25

Now finding x_8

x_n=x_1+(n-1)d\\x_8=x_1+(8-1)d\\x_8=-25+7(20)\\x_8=-25+140\\x_8=115

So, \mathbf{x_8=115}

Now finding x_{12}

x_n=x_1+(n-1)d\\x_{12}=x_1+(12-1)d\\x_{12}=-25+11(20)\\x_{12}=-25+220\\x_{12}=195

So, \mathbf{x_{12}=195}

c) what is the common difference of the sequence a_m

Looking at the table, we get a_7=104, a_8=91 and a_9= 78

Deterring the common difference by subtracting a_7 from a_8 we get

91-104 =-13

So, the common difference is -13

d) what is a_12? what is a_15?

The formula used is: a_n=a_1+(n-1)d

We know common difference d= -13, we need to find a_1

Using a_7=104 we can find x_1

a_n=a_1+(n-1)d\\a_7=a_1+(7-1)d\\104=a_1+7(-13)\\104=a_1-91\\a_1=104+91\\a_1=195

So, We have a_1 = 195

Now finding a_{12} , put n=12

a_n=a_1+(n-1)d\\a_{12}=a_1+(12-1)d\\a_{12}=195+11(-13)\\a_{12}=195-143\\a_{12}=52

So, \mathbf{a_{12}=52}

Now finding a_{15} , put n=15

a_n=a_1+(n-1)d\\a_{15}=a_1+(15-1)d\\a_{15}=195+14(-13)\\a_{15}=195-182\\a_{15}=13

So, \mathbf{a_{15}=13}

5 0
3 years ago
What is the answer for -8n=13
KatRina [158]

Answer:

-13/8

Step-by-step explanation:

u divied by -8 to get n by itself

4 0
2 years ago
Read 2 more answers
A student used his place value chart to show a number. After the teacher instructed him to divide his number by 100,the chart sh
valina [46]

Answer: When you divide by 100 you are essentially moving the decimal of the number two places to the left. In undoing this you would have to move the decimal of the number two places to the right.

28.003 would then turn into 2,800.3

Step-by-step explanation:

Unfortunately I cannot draw a chart on here but that is the best I can do.

8 0
3 years ago
tenesa bought a 50 pound bag of flour for her bakery. she used 13.65 pounds of flour. how many pounds of flour are left in the b
saw5 [17]
Answer: 36.35


work:
50 - 13.65 = 36.35
4 0
2 years ago
Read 2 more answers
What are the coordinates of the fourth point that could be connected with (–8, 0), (1, 0), and (1, –5) to form a rectangle?
Ksju [112]
(-8,-5). If you think about it, for a rectangle, the x-coordinates must be the same in two pairs and the y-coordinates must be the same in two pairs. Since there are already 2 0's, 2 1's, you need a -8 and -5 to complete it. Hence, the last coordinate is (-8,-5)
5 0
3 years ago
Other questions:
  • Hurry!!! Determine whether the random variable described is discrete or continuous. The time of a randomly chosen city employee
    8·2 answers
  • Please answer asap!!!
    12·2 answers
  • Convert 300 Kelvin to Celsius. Write your answer using decimals.
    8·1 answer
  • Please help Please help<br> The side length of a cube is 6 cm. What is the volume of the cube?
    13·2 answers
  • Casey is a real estate agent. She earns 8.15% commission on each sale she makes. After working with a potential buyer for 3.5 mo
    8·1 answer
  • A dairy needs 230 gallons of milk containing 6% butterfat. How many gallons each of milk containing 8% butterfat and milk contai
    14·1 answer
  • Will give branist if done correctly..it would really help me out.. Thank you in advance!
    10·1 answer
  • Which item in nature does NOT follow the Fibonacci Sequence *
    10·1 answer
  • Evan took a math quiz last week. He got 8 problems correct and 72 problems incorrect. What percentage did Evan get correct?
    13·2 answers
  • The area of the hexagon pictured above is ___ units2. Round answer<br> to the hundredths.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!