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Karo-lina-s [1.5K]
3 years ago
5

The inverse variation equation shows the relationship between wavelength in meters, x, and frequency, y. y = 3x10^8/x What is th

e wavelength for radio waves with frequency 3 × 10^9?
Mathematics
2 answers:
Andreyy893 years ago
8 0

Answer:

.1 (or 1/10)

Step-by-step explanation:

3 * 10^9 = 3 * 10^8/x

<em>Use PEMDAS to interpret</em>

3* 10^9  = 3 * (10^8)/x

<em>Divide both sides by 3</em>

10^9 = (10^8)/x

<em>Divide both sides by 10^8</em>

10 = 1/x

<em>Find the reciprocal of both sides</em>

1/10 = x

Sveta_85 [38]3 years ago
7 0

Answer:

0.1 m

Step-by-step explanation:

y = (3x10⁸)/x

3 × 10⁹ = (3×10⁸)/x

x = (3×10⁸)/(3×10⁹)

x = 10^(8-9)

x = 10^-1

x = 1/10

x = 0.1

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A sporting goods manager was selling a ski set for a certain price. The manager offered the markdowns shown on the right, making
ra1l [238]

Answer:

The original selling price would be $ 515.87 ( approx )

Step-by-step explanation:

Consider the complete question is :

"A sporting goods store manager was selling a ski set for a certain price. The manager offered the markdowns​ shown, making the​ one-day sale price of the ski set ​$325. Find the original selling price of the ski set. It was marked down 10% and 30%"

Suppose x be the original selling price ( in dollars ),

After marking down 10%,

New selling price = x - 10% of x = x - 0.1x = 0.9x

Again after marking down 30%,

Final selling price = 0.9x - 30% of 0.9x

= 0.9x - 0.3 × 0.9x

= 0.9x - 0.27x

= 0.63x

According to the question,

0.63x = 325

\implies x =\frac{325}{0.63}=\$ 515.87

Therefore, the original selling price would be $ 515.87.

8 0
4 years ago
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Which figure shows an example of symmetry?
damaskus [11]

Answer:

It looks like B would be the correct answer.

Step-by-step explanation:

Hope this helps:)

4 0
3 years ago
Line A is represented by the equation given below:
MrMuchimi
To have infinitely many solutions they must describe the same line.  So any multiple or fraction of the reference line would indeed describe the same line, and thus "intersect" at each and every of an infinite number of points.

2(x+y=4)

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4 0
3 years ago
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Can someone please answer this for me I'm begging
GrogVix [38]
If the length of JK is 16.4 miles, it will be diameter of this circle, the radius will be JK/2 = 8.2 miles

As we know the length of circle is 2π*r  in this case r = 8.2

The arc JM is 1/4 length of the whole circle so arc JM = (2π*8.2)*(1/4) = 2π*8.2/4 = π*8.2/2 = π*4.1

if we assume that π=3.14 the answer will be 3.14 * 4.1 = 12.874.... And as the answer needs to be rounded to the nearest tenth it will be 12.874≈12.9

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4 years ago
What are solutions for the equation y=8x-5
Semmy [17]

Answer:

Multiple

Step-by-step explanation:

You put the equation in slope intercept form, therefore, the solutions are the entire line!

Every point on the line can be considered a solution.

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3 years ago
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