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3 years ago

Explain why not all regular polygons will tessellate.

1 answer:

4 0

No other regular polygon can tessellate because of the angles of the corners of the polygons. In order to tessellate a plane, an integer number of faces have to be able to meet at a point. For regular polygons, that means that the angle of the corners of the polygon has to divide 360 degrees.

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A coffee shop collected the following information regarding purchases from 110 of its customers 59 purchased coffee 39 purchased

Andrej [43]

Answer:

Let X be the number of customer purchased coffee

Let Y be the number of customer purchased donuts

Then $X\cap Y$ is the number of customer purchased both coffee and donuts

$X\cup Y$ is the number of customer purchased both coffee or donuts

The Number of customers purchased only Coffee:

Number of customers purchased only donuts =n(X -Y)

$n( X -Y) = n(X) - n(X \cap Y)$

n(X-Y) = 59 -16

n(Y - X) = 43

The Number of customers purchased only donuts:

Number of customers purchased only donuts =n(Y -X)

$n(Y - X) = n(Y) - n(X \cap Y)$

n(Y - X) = 39 -16

n(Y - X) = 23

The Number of customers did not purchase either of these items:

Number of customers did not purchase either of these items = $n(X\cup Y)^{\prime}$

First lets find $n(X\cup Y)$

$n(X\cup Y) = n(X) + n(Y) - n( X \cap Y)$

$n(X\cup Y) = 59 + 39 - 16$

$n(X\cup Y) = 82$

$n(X\cup Y)^{\prime}$ = $110 - n(X\cup Y)$ = 28

5 0

4 years ago

Put into mathematical equation: one fifth the sum of 7 and a number

pashok25 [27]

Answer:

(x+7)·.2

Step-by-step explanation:

The sum of x and 7 is x+7. The word sum indicates addition. Then it says multiply by 1/5, so i converted it to decimal which is .2

6 0

3 years ago

What single transformation was applied to triangle AAA to get triangle BBB?

UkoKoshka [18]

I assume c, because usually to get to the opposite you reflect the line or figure on the x axis

4 0

4 years ago

Which are the solutions of he quadratic equation ? x2 = 9x + 6

dedylja [7]

Put everything on the same side of the equals sign and set it equal to zero so you can factor it. $x^{2} -9x-6=0$ . In order to factor that you have no choice really but to put it into the quadratic formula. When you do that you find that your zeros are x = 9.623475383 and -.623475383

4 0

4 years ago

Read 2 more answers

Describe , Ella has 50 stacks of ten pennies in each stack.describe how to find how many pennies Ella has in all. For a 7 year o

Alex777 [14]

The Formula:Number of stacks multiplied by number of pennies in each stack
So 50x10=500
and talking money wise he has 5 dollars

6 0

3 years ago

Read 2 more answers