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neonofarm [45]
3 years ago
10

How many lines of symmetry does the letter x have

Mathematics
2 answers:
lana [24]3 years ago
8 0
The letter x has two lines of symmetry.
Amanda [17]3 years ago
8 0

Answer:

Step-by-step explanation:

I think it's got 4, one on the X axis, one on the y axis,   one on the y=x  line and one on the y =-x line  :P

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How many times longer is the wavelength of a sound wave with a frequency of 20 waves per second than the wavelength of a sound w
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The sound wave with a <u>frequency of 20</u> waves/sec is 800 longer than the wavelength of a sound wave with a <u>frequency of 16,000</u> waves/sec

<h3>Calculating wavelength </h3>

From the question, we are to determine how many times longer is the first sound wave compared to the second sound water

Using the formula,

v = fλ

∴ λ = v/f

Where v is the velocity

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and λ is the wavelength

For the first wave

f = 20 waves/sec

Then,

λ₁ = v/20

For the second wave

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Then,

The factor by which the first sound wave is longer than the second sound wave is

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= (v/20) × 16000/v)

= 16000/20

= 800

Hence, the sound wave with a <u>frequency of 20</u> waves/sec is 800 longer than the wavelength of a sound wave with a <u>frequency of 16,000</u> waves/sec

Learn more on Calculating wavelength here: brainly.com/question/16396485

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How r u so good at this
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Answer:

Step-by-step explanation:

Good at what?

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