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3 years ago

Describe, in general, the steps for producing a frieze pattern.

Mathematics

1 answer:

IrinaK [193]3 years ago

5 0

An infinite strip with a symmetric pattern is called a frieze pattern.

There are only seven possible frieze pattern.

1. Translation symmetry only.

2. Glide reflection plus translation symmetry.

3. Reflection over a horizontal line plus translation.

4. Reflection over a vertical line plus translation.

5. Rotation (a half-turn about a point on the mid line of the strip) plus translation.

6. Reflection over a vertical line plus a reflection over a horizontal line plus translation.

7. Reflection over a vertical line plus glide reflection plus translation.

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Annabelle owns a small business selling clothing. She knows that in the last week 56 customers paid cash, 26 customers used a de

frosja888 [35]

Answer

23/51

Step-by-step explanation:

The probability of the next customer paying with a debit or credit card is =23/51

5 0

1 year ago

Bill's golf bag contains 9 white golf balls, 6 yellow golf balls, 1 orange golf ball, and 1 pink golf ball. Without looking, Tim

BaLLatris [955]

Answer:

The correct answer is 0.0330 and the events are independent.

Step-by-step explanation:

Total number of balls in Bill's golf bag = 17

Let A be the event of drawing a white ball and B be the event of drawing an orange ball.

Number of white balls Bill has in his bag is 9.

Probability of the event A in the first draw = $\frac{9}{17}$

Number of orange ball in Bill's bag is 1.

Probability of event B in the second draw = $\frac{1}{16}$

Thus total probability for Tim to tee off with a white ball and putt with an orange ball = $\frac{9}{272}$ = 0.0330

The above events are independent on each other.

4 0

3 years ago

When graphing y = 2x2 + 35x + 75, which viewing window would allow you to see all of the intercepts and the minimum as closely a

djverab [1.8K]

The intercept with the y-axes occurs when x = 0

f(0) = 2*02 + 35*0 + 75 = 0 + 0 + 75 = 75

So intercept with x axes is the point (0,75)

The intercept with the x-axes occurs when y=0

2x2 + 35x + 75 = 0

As there’s no direct way to find x, we can use the Bhaskara formula:

x=(-b+- square root (b2-4ac))/(2a)

This formula is for: ax2 +bx + c = 0

So:

a=2

b=35

c=75

x=(-35+- square root (35^2-4*2*75))/(2*2)

So x can be -2.5 or -15

So intercept with y axes are the points (-2.5,0) and (-15,0)

And there is also a formula to find the mínimum. The mínimum is always the vertex:

Xv = -b/(2*a) = -35/(2*2) = -8.75

Yv = f(Xv) = f(-8.75) = 2(-8.75)^2 + 35(-8.75) + 75 = -78.125

So the minimum is the point (-8.75, -78.125)

You can easily verify all these data with a graphic software such as GeoGebra.

Here is the complete list of all the points we need to see:

(0,75); (-2.5,0) ; (-15,0), (-8.75, -78.125)

So the mínimum X has to be -15 and the máximum X has to be 0

and the mínimum Y has to be -78.125 and the máximum Y has to be 75

So this leads to a different scale for X and for Y.

Window x = [ -15, 0] y = [ -78.125, 75]

5 0

3 years ago

Electric City is having a sale on compact discs. The regular price of $14.00 is decreased by 20%. What is the sale price?

rewona [7]

.20*14.00=2.80
14.00-2.80=11.20

8 0

3 years ago

Help I have one day to do this pleaseeeeeee

Sonbull [250]

I’m pretty sure the answer is c.

Since each I guess ‘layer, or cubes will have 12 cubes.

The height is 4

12*4=48

I hope this helps, I’m really sorry if the answer is wrong

6 0

3 years ago

Read 2 more answers